(AIFESPYL2016) will be held between August 27-30, 2016 in Nanchang, ...... control program (NSCP) was implemented in 2005, whose goal was to reduce the.
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Advanced
International
Forum
on
Ecological
Security
of
Poyang
Lake
(AIFESPYL2016) will be held between August 27-30, 2016 in Nanchang, Jiangxi Province, China. Poyang Lake is the largest fresh water lake in China. Controlled by waters from the Lake tributaries and the Yangtze River, dynamic and seasonal variations of water present a unique landscape of fresh water lake-wetland ecosystem. Poyang Lake wetland is a key habitat site for wintering migratory birds with global importance. The lake plays an irreplaceable role for flood control, river shipping, city water supply and conservation of biological diversity of middle and lower reaches of Yangtze River. The central theme of the conference is ecological security of the Poyang Lake, in particular the associated ecological security issues of water, wetland and natural and human-induced environmental impacts. The AIFESPYL will include conference presentations, panel discussions and field trip to Poyang Lake and the surrounding area. Hosted by the Jiangxi Normal University (JXNU), the AIFESPYL will serve as a regional event of the European Space Agency (ESA) - Ministry of Sciences and Technology of China (MOST) Dragon Corporation Program to promote international collaborations in Poyang Lake studies.
Host Jiangxi Normal university (JXNU)
Sponsors National Remote Sensing Center of China (NRSCC) The European Space Agency (ESA)
Organizers Ministry of Education’s Key Laboratory of Poyang Lake Wetland and Watershed Research (JXNU) School of Geography and Environment, JXNU Collaborative Innovation Center for Major Ecological Security Issues of Jiangxi Province and Monitoring Implementation
Honorary Chairmen SUN Jiulin
Academician, Chinese Academy of Engineering
CHINA
GONG Jianya
Academician, Wuhan University
CHINA
ZHOU Chenghu
Academician, Chinese Academy of Sciences
CHINA
LIN Hui
The Chinese University of Hong Kong
CHINA
Chairmen
Members TAO Shu
Academician, Peking University
CHINA
GUO Renzhong
Academician, Chinese Academy of Engineering
CHINA
XIA Jun
Academician, Wuhan University
CHINA
CHEN Fahu
Academician, Lanzhou University
CHINA
TU Zongcai
Jiangxi Normal University
CHINA
HU Zhenpeng
Nanchang University
CHINA
LI Jiahong
Ministry of Science and Technology
CHINA
WANG Xiaohong
Jiangxi Academy of Science
CHINA
YANG Guishan
Chinese Academy of Sciences
CHINA
Herve Yesou
SERTIT, Université de Strasbourg
FRANCE
Claudia Kuenzer
The German Earth Observation Centre of The
GERMANY
German Aerospace Centre WANG Qiao
Ministry of Environmental Protection
CHINA
DAI Xingzhao
Mountain Rivers and Lakes in Jiangxi Province CHINA Commission Office
LU Guonian
Nanjing Normal University
CHINA
CHENG Xiao
Beijing Normal University
CHINA
XUE Desheng
Sun Yat-sen University
CHINA
LI Zengyuan
Chinese Academy of Forestry
CHINA
GAO Zhihai
Chinese Academy of Forestry
CHINA
CHEN Liangfu
Chinese Academy of Sciences
CHINA
YAN Bangyou
Jiangxi Provincial Department of Science and CHINA Technology
CHEN Xiaoling
Wuhan University
CHINA
LI Bin
Central Michigan University
USA
GONG Peng
Tsinghua University
USA
BAO Shuming
University of Michigan
USA
XIAO Xiangming
University of Oklahoma
USA
JI Wei
University of Missouri-Kansas City
USA
Bob SU
ITC of the University of Twente
HOLLAND
XU Bing
Tsinghua University
CHINA
YUE Tianxiang
Institute of Geographical Sciences and Natural CHINA Resources Research
Juliane Huth
The German Earth Observation Centre of The
GERMANY
German Aerospace Centre ZHOU Yuyu
IOWA State University
USA
Chairmen MEI Guoping
Jiangxi Normal University
CHINA
Secretary General WANG Yeqiao
Jiangxi Normal University
CHINA
FANG Chaoyang
Jiangxi Normal University
CHINA
LUO Jin
Jiangxi Normal University
CHINA
DING Hui
Jiangxi Normal University
CHINA
WANG Tao
Jiangxi Normal University
CHINA
XIAO Zhongmin
Jiangxi Normal University
CHINA
ZHANG Xiang ZHANG Qi
CHINA CHINA
PENG Kunguo
Wuhan University Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Jiangxi Provincial Geomatics Center Mountain Rivers and Lakes in Jiangxi Province Commission Office Jiangxi Academy of Environmental Sciences
LIU Jianxin
Hydrology Bureau of Jiangxi Province
CHINA
YIN Jianmin
Jiangxi Province Meteorological Bureau
CHINA
HU Jianmin
Jiangxi Institute of Soil and Water Conservation
CHINA
GE Gang CHEN Yuwei
CHINA CHINA
ZHENG Lin
Nanchang University Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences Administrative Bureau of Jiangxi Poyang Lake Nanji Wetland National Nature Reserve Jiangxi Normal University
LIU Ying
Jiangxi Normal University
CHINA
JIANG Meixin
Jiangxi Normal University
CHINA
LAI Geying
Jiangxi Normal University
CHINA
SHU Xiaobo
Jiangxi Normal University
CHINA
QI Shuhua
Jiangxi Normal University
CHINA
JIA Yulian
Jiangxi Normal University
CHINA
ZHAO Hongmei
Jiangxi Normal University
CHINA
LIAO Jinbao
Jiangxi Normal University
CHINA
GAO Dan
Jiangxi Normal University
CHINA
YE Minsheng
Jiangxi Normal University
CHINA
ZHANG Zhizhi
Jiangxi Normal University
CHINA
PAN Yanjiang
Jiangxi Normal University
CHINA
Co-ordinators
Members
LIAO Mingwei FANG Yu
HU Binhua
CHINA CHINA CHINA
CHINA CHINA
Secretary
Prof. SUN Jiulin Academician, Chinese Academy of Engineering
Prof. GONG Jianya Academician, Chinese Academy of Sciences, Wuhan University Speech title: Geospatial service web and its applications
Prof. CHEN Fahu Academician, Chinese Academy of Sciences Speech title: East Asian summer monsoon precipitation variability since the last deglaciation
Prof. LIN Hui The Chinese University of Hong Kong Speech Title :A study on VGE based simulation and evaluation of ecological safety
Prof. Herve Yesou SERTIT, Université de Strasbourg Speech Title : Sixteen years of over Poyang Lake monitoring exploiting satellite images applications to water resources analysis and biodiversity maintain
Prof. Claudia Kuenzer German Earth Observation Centre of The German Aerospace Centre Speech Title :The potential of innovative earth Observation approaches to assess ecologic dynamics in wetlands and their water sheds
Prof. GONG Peng Tsinghua University Speech Title : From the wetland dynamics of Poyang Lake to global mapping of dynamic land cover
Prof. BAO Shuming University of Michigan Speech Title : Poyang Lake ecosystem health assessment
Conference Venue Binjiang Hotel, Nanchang
Language The official language of the conference is English.
Name Badge Please wear the conference name badges for identification during the conference period.
Smoking Smoking is forbidden in the conference hall.
Mobile Phone As a courtesy to other participants and presenters, please ensure that all mobile device(s) is/are turned off or is/are in “SILENT” mode during the sessions.
Transportation From
To
Vehicle
time
Nanchang
Bus
100 minutes
Airport
Taxi
45
Bus
100 minutes
Railway station
Taxi
45
minutes
Nanchang
Bus
50
minutes
Railway station
Taxi
25
minutes
Nanchang West
Binjiang Hotel
minutes
27 August 2016 (Saturday) 09:00-10:00
Opening Ceremony
10:00-10:15
Group Photo
Binjiang Hotel
Keynote Speech ： East Asian summer monsoon precipitation variability 10:30-11:10
since the last deglaciation Academician, Prof. CHEN Fahu, Lanzhou University Keynote Speech：Sixteen years of over Poyang Lake monitoring exploiting
11:15-12:00
satellite images applications to water resources analysis and biodiversity maintain Prof. Herve Yesou, SERTIT, Université de Strasbourg
12:00-13:30
Lunch Keynote Speech ： A study on
13:30-14:15
VGE based simulation and evaluation of
ecological safety Academician of Eurasian Academy of Sciences, Prof. LIN Hui Chinese University of Hong Kong Keynote Speech: From the wetland dynamics of Poyang Lake to global
14:20-15:00
mapping of dynamic land cover Prof. GONG Peng, Tsinghua University
15:00-15:20
Tea Break Wetland Ecosystem and Ecological Security (S2)
15:20-15:40
Numerical simulation of vertical water movements in a typical wetland of Lake Poyang Prof. ZHANG Qi,
Nanjing Institute of Geography and Limnology
Water Ecological Security (S1) 15:40-16:00
Simulation Study for the Impact of Poyang Lake Hydro Project on the Flow of the Yangtze River Main Stream Prof. LAI Geying,
Jiangxi Normal University
Regional Development and Sustainable Use of Resources (S6) 16:00-16:20
A
MODIS-based
retrieval
model
of
suspended
particulate
concentration for the two largest freshwater lakes in China Prof. WU Guofeng, Shenzhen University Regional Development and Sustainable Use of Resources (S6)
16:20-16:40
Impacts on Sediments Budget in Poyang Lake from Human Activities Prof. QI Shuhua, Jiangxi Normal University Regional Development and Sustainable Use of Resources (S6)
16:40-17:00
Process and characteristics of recession of Poyang Dr. JIA Yulian，Jiangxi Normal University
17:00-18:00
Poster Session
18:00-20:00
Dinner
matter
28 August 2016 (Sunday) 08:30-09:15
Venue:Binjiang Hotel
Keynote Speech: Geospatial service web and its applications Academician, Prof. GONG Jianya, Wuhan University Keynote Speech：The potential of innovative earth Observation
09:15-10:00
approaches to assess ecologic dynamics in wetlands and their water sheds Prof. Claudia Kuenzer / Dr. Juliane Huth German Earth Observation Centre of The German Aerospace Centre
10:00-10:20 10:20-11:05
Tea Break Keynote Speech: Poyang Lake ecosystem health assessment Prof. BAO Shuming, University of Michigan Wetland Ecosystem and Ecological Security (S2)
11:05-11:25
Water System Modeling of Poyang Lake Watershed Prof. ZHANG Xiang,
Wuhan University
Ecological Security and Economy Development (S5) 11:25-11:45
Developing a Vegetation-Based Index of Biotic Integrity to Assess the Ecological Health of Poyang Lake Wetland, China Dr. YANG Wenjing, Jiangxi Normal University
12:00-13:30
Lunch Ecological Security and Environment Monitoring Technology and
13:30-13:50
Application (S4) Research on Rainstorms Events in Poyang Lake Basin Dr. ZHAN Mingjing, Climate Center of Jiangxi Province Landuse/Land-cover Change and Ecological Security (S3)
13:50-14:10
Simulation of Land-use Change in the Poyang Lake Region Based on CA-Markov Model Dr. HU Bisong, Jiangxi Normal University Ecological Security and Environment Monitoring Technology and Application (S4)
14:10-14:30
Maximum entropy model versus remote sensing-based methods for extracting snail habitats in Poyang Lake zone Dr. ZHANG Zhijie, Fudan University Ecological Security and Economy Development (S5)
14:30-14:50
Rethinking the Land policy of returning farmland to lake around Poyang Lake, China Dr. XIE Zhenglei, Jiangxi Normal University Ecological Security and Environment Monitoring Technology and Application (S4)
14:50-15:10
Modeling phosphorus transport and its response to climate change at upper stream of Poyang lake-Le'An catchment. Dr. JIANG Sanyuan, Nanjing Institute of Geography and Limnology
15:10-15:30 15:30-15:50
Tea Break Wetland Ecosystem and Ecological Security (S2) Food web persistence in fragmented landscapes
Dr. LIAO Jinbao, Jiangxi Normal University Ecological Security and Economy Development (S5) 15:50-16:10
estimate the spatial and temporal patterns of ET in Poyang Lake basin Dr. LIU Chong, Jiangxi Normal University Ecological Security and Economy Development (S5)
16:10-16:30
Multi-scale variability of water discharge and sediment load in Poyang Lake during 1956-2014 Dr. HE Lei, Jiangxi Normal University Regional Development and Sustainable Use of Resources (S6)
16:30-16:50
Preliminary study on benthic macro invertebrate index of biotic integrity (B-IBI) for the health assessment in the Poyang Lake, China Dr. HUANG Qi, Jiangxi Normal University
17:00-19:30
Dinner & Certificate Award 29-30 August 2016 (Monday-Tuesday)
Field Trip
Session 1: Water Ecological Security (S1) Simulation Study for the Impact of Poyang Lake Hydro Project on the Flow of the Yangtze River Main Stream LAI Geying Jiangxi Normal University
Material flux is an important basis for maintaining the relationship between lakes and rivers, while the core of material flux is the water flux. By adopting a 2D hydrodynamic model, targeting the Poyang Lake Hydro Project (PLHP) to be built and the water level regulating scheme under planning, this paper carried out quantitative analysis on the potential impact of water level regulating schemes of Hydro Projects under 3 typical year patterns (wet, normal and dry seasons) on the flow of the Yangtze River main stream. This analysis is done by adopting the Pearson Type III hydrologic frequency analysis targeting the wet and dry seasons respectively, and based on simulation of 2 scenarios, namely, the one with hydro project and the one without. As indicated by the simulation results, in a PLHP water level regulating period, the difference is very small in terms of the total flow discharged from the lake to the Yangtze River main stream under two scenarios (with or without the hydro project); the water flow under those two scenarios is basically maintained in a state of balance, though the distribution times for water flow being discharged from the lake to the Yangtze River main stream is changed. During the dry season, the Project has minor impact on the flow of The Yangtze River, or even increases the amount of water discharged. Moreover, the flow increasing effect presents a descending order during dry, normal and wet years. During wet seasons, if the water level of the lake is far less than the highest regulating water level of 15m, the existing hydro project regulation scheme which proposes to regulate the water level to 14 - 15m on September 15 is obviously defective and requires further optimization. Keywords: Poyang Lake, hydro project, The Yangtze River, flo，
Spatial characterization, risk assessment and statistical source identification of the dissolved trace elements in the Ganjiang River—feeding tributary of the Poyang Lake, China ZHANG Hua Jiangxi Normal University
Surface water samples were collected from 20 sampling sites throughout the Ganjiang River during pre-monsoon, monsoon and post-monsoon seasons, the concentrations of dissolved trace elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS) for the spatial and seasonal variations, risk assessment, source identification, and categorization for risk area. The result demonstrated that concentrations of the elements exhibited significant seasonality. The high total element concentrations were detected at sites close to
the intensive mining and urban activities. The concentrations of the elements were under the permissible limits as prescribed by related standards with a few exceptions. The most of HPI values were lower than the critical index limit, indicating the basically clean water used as habitat for aquatic life. As was identified as the priority pollutant of non-carcinogenic and carcinogenic concerns and the inhabitants ingesting the surface water at particular site might be subjected to the integrated health risks for exposure to the mixed trace elements. Multivariate statistical analyses confirmed that Zn, As, Cd, and Tl derived from mining and urban activities, V, Cd, and Pb exhibited mixed origin, and Co, Ni, and Cu mainly resulted from natural processes. Three categorized risk areas corresponded to high, moderate, and low risk, respectively. As a whole, the upstream of the Ganjiang River was identified as the high risk area relatively. Keywords: Ganjiang River; trace element; Surface water; risk
Spatial-temporal patterns detection in Hulun Lake Changes of lake area play an important role in global water cycling and aquatic ecosystem development. Surface area of inland lakes, particularly closed lakes are known to be sensitive to climate change and environmental variability, thus they can be used as a proxy for current even future climate changes monitoring in principle. In this study, Hulun Lake, the largest lake in the cold and arid Hulunbeir grassland of Inner Mongolia Autonomous Region, was selected to indicate the dynamic water surface area in the seasonal and long term change through remotely sensed images. Landsat images and MODIS 8-day images from 2000 to 2014 were used to monitor lake surface area change. A locally adaptive unmixing method and objected based method were combined to extract lake-water area with high accuracy and change detection. Jason T-P satellite data was used to obtain the information of lake topography and lake-water level. Furthermore, climatic change characteristics were used to analysis driving forces for Hulun Lake area change. The relationship between monthly water level and water area was analyzed as well .The results showed that the area of lake-water decreased over 500km2 from 2000 to 2014. The dramatic change mostly occurred in the northeast and south of the lake. This study provides long-term and seasonal baseline data to monitor future changes in Hulun Lake’s area in timely, particularly quantifying the extreme drought conditions. Keywords: Hulun lake, Spatial-temporal patterns, MODIS imagey
Chinese freshwater fisheries carbon sink capacity WU Bin Fisheries Research Institute of Jiangxi Province
lives on natural fishes that feed on natural food. Assuming that 20% of the total production of grass carp ， crucian carp ， common carp and blunthead bream Megalobrama amblycephala from aquaculture feeding on the natural food. In order to know the freshwater fisheries carbon sink capacity，they were analyzed based on the data of “Chinese Fishery Statistical Yearbook ”from 2011 to 2015.
【 Result 】 The annual carbon sink capacity for national freshwater aquaculture were 13.63, 14.06, 14.58, 15.30 and 16.45 hundred thousand tons respectively from 2010 to 2014. There has been a continuation in the upward trend in sale, The average was 14.80 hundred thousand tons. The annual carbon sink capacity for national freshwater fishing were 2.93, 2.86, 2.95, 2.97 and 2.97 hundred thousand tons respectively, the average was 2.93 hundred thousand tons. 【 Conclusion and significance 】 With reducing resources, the development of carbon sink fishery will definitely become the mainstream of global fisheries economic development. This paper had important significance for sustainable development of freshwater carbon sink fishery ， and divided carbon sink developing path of freshwater fishery into following aspects, such as indirect carbon sink function of food chain, direct carbon sink function of freshwater life and the transformation of fishery activities with carbon sink technique. Keywords: freshwater fisheries; carbon sink capacity;
Water Extraction Using Polarimetric data CHEN Jiehong Jiangxi Normal University
Water is an important factor of Poyang Lake Basin. Hence, we use two new polarimetric features to extract water area based on quad-polarization data. Polarimetric features, phase angle, elliplicity and orientation angle, are first extracted from coherence matrix via unitary special rotation under target scattering reflection symmetry and rotation symmetry. Then targets are classified by polarimetric characteristrics preserved classier based on polarimetric features. After classification, the targets are classified into many categories. In order to recognize water objects, we use the water coherence matrix and a fluctuation coefficient to identify the classification result, therefore the water object is extracted. Keywords: Water extraction, Polarimetric data
Evaluating runoff variability using SWAT model and IHACRES model in the Ganjiang River watershed of Jiangxi province LIU Guihua Jiangxi Normal University
Water supply availability has significant impacts on the Poyang Lake watershed. As the largest river of Poyang Lake basin, the hydrological regime changes of Ganjiang River had an effect on water ecosystem health of Poyang Lake Basin. The SWAT (Soil and Water Assessment Tool) model and IHACRES (Identification of unit Hydrographs and Component flows from Rainfall, Evapotranspiration and Streamflow data) model were used for modelling runoff variability in Ganjiang River watershed to determine the applicability of hydrological models to the Poyang Lake basin. Both SWAT and IHACRES models represented observed runoff well that R2 (coefficient of determination) and NS (Nash-Sutcliffe) were both greater than 0.7 and PBIAS (percent bias) was smaller than 25. IHACRES model
was easy to be used for less data-preparation in primeval times of 1955-1979 while performed unfavorable during 1980-2010. This would attribute to climate change and human activities experienced in the watershed recent decades which had significantly impacts on hydrological cycle. By contrast, the complex, processes-based SWAT was a better choice to simultaneously simulate runoff variability and evaluate the effects of land use change and human activities in the basin where agricultural activities are intensive. It was possibly suitable for water resource planning and management. Keywords: Hydrological modeling, Ganjiang River watershed, r
Dynamics of carbon, nitrogen and phosphorus stoichiometry of dominant plants in a Poyang Lake wetland KUANG Wei Jiangxi Normal University
Currently, our knowledge of the temporal variability of carbon(C), nitrogen (N) and phosphorus (P) stoichiometry is much less developed than its spatial pattern. Besides, it remains unknown whether there is consistent temporal pattern for various ecosystems. In this study, different organs (e.g. leaves, stems, roots) of 9 dominant plant species were sampled along water table gradient in a typical Poyang Lake wetland from 2013 to 2015. Subsequently, C, N and P of various organs were measured. The objectives were to (1) determine the dynamics of C, N and P stoichiometry of dominant species, and (2) clarify the difference and links of C, N, P stoichiometry among various organs. The results indicated that C、N、 P contents of dominant plants showed clear intra- and inter annual variability. For example, mean C, N and P contents in the fall of 2013 were 354.92, 16.89 and 1.67mg•g-1, respectively, but the counterparts were 339.86, 23.22 and 2.08mg•g-1 in 2014. The inter-annual CV of C, N and P was similar to intra-annual CV, with CV value of less than 10% for C and N, but more than 20% for P. Moreover, C, N and P contents and associated C: N, C: P and N: P stoichiometry differed significantly among the organs. No significant correlations of C: N: P stoichiometry among leaves stems and roots were found. Among the three organs, leaf N: P ratio had largest seasonal variation, whereas root N: P ratio maintained relatively stable. Keywords: Poyang Lake; Stoichiometry; Nitrogen; Phosphorus; Yan
Analysis of suitable water level in the Poyang Lake lake of winter migratory birds GUO Yuyin, LIU Fagen, SI Wuwei, WANG Yang Poyang Lake hydrology bureau of Jiangxi Province
Poyang Lake is an important international wetland, to perching and foraging, the winter migratory birds represented by crane, has certain requirements on the condition of water-level. How to determine the suitable water level to maximize wetland functions of Poyang Lake, is very important to the ecological protection. Through analysis of terrain data and measured
water
level data from
river-communicating lakes area and typical dish-shaped lake, we found that the suitable water area for winter migratory birds of river-communicating lake is acceptable, but by the dispersed and large amplitude range of water area, it is not conducive to migratory birds for a long time stable habitat. The water level changed smaller at the typical dish-shaped lakes where the migratory birds habitated, and the suitable water level of each were not identical. The time that suitable water level appeared different, which is good for the stability of winter migratory birds to perch and forage overwintering. Keywords: Poyang Lake; winter migratory birds; suitable wate
Session 2: Wetland Ecosystem and Ecological Security (S2) Food web persistence in fragmented landscapes LIAO Jinbao, Jiangxi Normal University
Ongoing habitat destruction has become one of the leading drivers of biodiversity loss. Numerous studies have explored the effect of patch loss on food web persistence, while ignoring the critical role of patch fragmentation. We construct an extended patch-dynamic framework for different food webs incorporating species dispersal range and patch connectivity. We find that species at different trophic levels display different sensitivities to patch loss and fragmentation separately, which can be altered by the trophic structure where species are embedded. Relative to other food web motifs, omnivory structure significantly increases system robustness, as feeding on different trophic levels increases the omnivore’s persistence. In addition, a dispersal-competition tradeoff results in intermediate patch loss and fragmentation maintaining highest species diversity in the food web with exploitative or apparent competition. As a result, species extinction thresholds depend not only on landscape properties, competition-dispersal abilities, but also on food web structure. Variation in species feeding preference/pressure changes species extinction thresholds in fragmented landscapes,
therefore altering
community patterns. Concerning species conservation and management, we theoretically demonstrate that maximizing patch connectivity is not always effective for biodiversity maintenance especially in those food webs containing indirect competition, even leading to more species loss. Overall, our extended modelling framework provides a promising way to advance the spatial food web theory in heterogeneous
landscapes,
thereby
offering
new
insights
into biodiversity
conservation. Keywords: species dispersal, patch loss, patch fragmentation, food webs, competition-dispersal tradeoff, omnivory, patch-dynamic model
Ecological risk pattern of Poyang Lake basin based on land use XU Yu Jiangxi Normal University
This study takes Poyang Lake basin as a case study to explore the impact of land use change on ecological risk. Based on an ecological risk assessment model derived from land use structure, the study tries to explore ecological security pattern and provide a scientific reference for optimizing land utilization in Poyang Lake basin. The characteristics of land use changes in Poyang Lake watershed were analyzed quantitatively
based
on
land
use
data
during
2005—2013.
Then,
the
spatial-temporal variation of the ecological risk and the relationship between ecological risk and terrain factors were investigated by GIS techniques. The result shows that about 9.2% of the total areas experienced land use changes, which 68.5% occurred among farmland, construction land and forests, showing a remarkable trend of non-agricultural transformation. The average ecological risk index (ERI) increased from 0.237 in 2005 to 0.246 in 2013, probably as the consequence of farmland reduction and rapid expansion of construction land. The ERI showed a positive spatial autocorrelation and obvious local spatial clustering, and generally decreased significantly from north to south. Based on the spatial interpolation of ERI, the study area was divided into five grades: low risk region (ERI Keywords: ecological risk; land use; spatial pattern; Poyang
Numerical simulation of vertical water movements in a typical wetland of Lake Poyang ZHANG Qi Nanjing Institute of Geography and Limnology
Water movement through the soil-plant-atmosphere continuum (SPAC) plays an important role in maintaining wetland energy and nutrient balance. To better understand the vertical water fluxes through SPAC and quantify the water supply and drainage relationship for a typical vegetation community, numerical simulations were performed, using HYDRUS-1D model for a typical reed community wetland in Poyang Lake. The results showed that: (1) The simulated soil moisture were in a good agreement with the measured data, with a root mean square error (RMSE) of 0.03-0.04 cm3 /cm3 and a relative error (RE) of 0-3%; (2) Under average hydrological conditions, the main water supply of root zone soil is rainfall infiltration (1450 mm) and the upward flow from deep soil below the root zone (609 mm). The main drainage is via deep leakage (1053 mm), transpiration (926 mm) and soil evaporation (176 mm); (3) The rainfall infiltration and soil water drainage mainly occurred in April-June and accounted for 65% and 73% of the annual amount, respectively. The soil evaporation and vegetation transpiration were highest in July-August, accounting for 30% and 47% of the annual amount, respectively. The upward fluxes from deep soil mainly occurred in June-August, accounting for 76% of the annual amount; (4) Projected simulations indicated that rainfall infiltration, soil water drainage and vegetation transpiration increased with an increasing rainfall intensity. The upward flow from deep soil and vegetation transpiration were found to decrease by 172 mm and 127 mm if the lake level decreased from 17.5 m to 15.5 m. These results were the first to quantify the water fluxes in the SPAC system of Poyang Lake. The findings imply that the wetland vegetation is highly dependent on
the root zone soil water availability, which is supplied via rainfall infiltration and deep aquifers. Variations in rainfall intensity, air temperature and lake water level may change the water balance of the SPAC system significantly, and potentially the structure of vegetation communities. Keywords: Soil water, water supply and drainage process
Water System Modeling of Poyang Lake Watershed ZHANG Xiang Wuhan University
Poyang Lake is a complex lake system interacted by inflow, outflow and regulation. The analysis on changes of discharges of inflow and outflow and especially water storage of Poyang Lake has significant scientific meaning for ecological and environmental protection of Poyang Lake wetlands. In this paper, the 1953-2013 daily series of discharges and the water levels were used to analyze the hydrologic trends of Poyang Lake with three methods, the Moving Average method, Kendall Trend Test and Mann-Kendall Mutation Test. Based on the trend analysis, the difference between discharges of inflow and outflow of Poyang Lake (Qin-Qout) and the change of water volume were proposed as two indexes which are respectively related to the discharges and water levels to characterize the changes of water storage of Poyang Lake. The results showed that the discharges of inflow and outflow in September presented an obvious increasing trend. The lake water level had a significant decreasing trend in the long sequence, and decreased heavily since 1995, and the low water level of the lake appeared earlier and lasted a longer time than before. The two indexes revealed similar change trend where there were no significant changes in the water storage over the years. The changes in September and October were relatively large, might be mutated in the 1990s, and related to the storage and operation of Three Gorges Reservoir for the years after 2003. Keywords: Poyang Lake; changes of water storage
Study of Coupling Relationship Among Cropland，Food and Population of Poyang Lake Ecological Economic Zone Based on The Econometric Analysis LIAO Fuqiang Jiangxi Normal University
This paper mainly study the relationship changing between the total grain output, cropland resources quantity and population change from 1992 to 2013 through econometric analysis method. Firstly directly stability test on the three variables of the original sequence, proving these variables are not smooth. Then must do the difference test again, this test result conforms to the request of stability test, proving these three are same order integration and showing that three non-stationary time series it is possible to exist between the long-term stable equilibrium relationship and then study JJ cointegration test on the three variables, carried out a conclusion that a long-term equilibrium relationship is possible between grain output, number of cropland resources, and population. Secondly
Granger causality test, proved that the population change is the Granger reason of cropland resources quantity and the total grain output between 1992 and 2013 the population of Poyang Lake ecological economic zone. In order to quantitatively study the interaction relationship between them, finally using the vector error correction model, variance decomposition and impulse response analysis method on the further analysis and forecasting, coming out the impact of the change of total grain output is greater than the number of cultivated land resource change on the impacts of food production. But over time, the impact of cropland resource to grain output will wane; Population quantity change will has a negative impact of cropland land resources quantity change. Keywords: Food; Cropland; Population; Econometric analysis;
Study on Ecological Dynamic Monitoring Service System for Poyang Lake basin LIAO Ming Jiangxi Provincial Geometrics Center
The ecological environment dynamic monitoring is the necessary means and precondition of ecological security and ecological civilization construction. The following problems of ecological environment monitoring exist: multi-source and multi-scale data acquisition and integration is pre-requisite; quick processing and analysis of huge amounts of satellite images subject to semi-automatic condition of quantitative remote sensing model , as well as A static snapshot service is difficult to express the spatiotemporal dynamic change process. Aimed at these present situation, This paper presents the lake basin ecological environment dynamic monitoring service system, considering the aspects of data real-time diversified acquisition based on the sensor network, ecological information themed dynamic gathering based on data warehouse, information sharing and intelligence services based on cloud computing, the dynamic simulation and knowledge-based applications based on VGE. Eventually validated in Poyang lake area, it provide support services for ecological monitoring of Poyang lake basin. Keywords: ecological monitoring; national geographic conditions monitoring；data warehouse；virtual geographical environment
Influence of retention time on constructed wetlands for the treatment in landscape water of Haizhu wetland LIU Wen Zhongkai University of Agriculture and Engineering
Calamus and canna were planted in the horizontal flow constructed wetland systems respectively to study the influence of retention time on horizontal flow constructed wetland for the treatment in the contaminated landscape water of Haizhu wetland. The results shown that (1) with the extension of retention time, the removal efficiency of system had increased gradually. (2)the removal efficiecy of NH4+-N,TN and COD in calamus constructed wetland are better than those in canna constructed wetland that at retention time = 5d, the removal rates can reach up to
85.92%、68.63% and 86%, respectively, while the removal of TP is less efficient in calamus constructed wetland than in canna constructed wetland. Keywords: constructed wetland; removal efficiency; HRT
Information Extraction of Wetlands Using Object-oriented Method and Gaofen-1 Images—A Case Study in Poyang Lake TAO Zhanghua Jiangxi Normal University
As important natural ecosystem, wetlands play significant roles in maintaining environment stability, adjusting flood and preserving biodiversity, et al. Therefore accurate wetland mapping information is important for understanding wetland functions and monitoring their response to environmental changes. Due to high dynamic changes of water level in Poyang Lake, wetland landscape is in rapid seasonal changes. And the variation of wetland landscape directly affect the selection of the migratory bird habitats. In this study, we took the Poyang lake wetland as research region, and chose GF-1 WFV image as the data source. The object-oriented classification method was applied to extract the wetland types information.
We
calculated
the
wetland
types
transformation
matrix
and
quantitative analyzed spatiotemporal changes of all the wetland types. The results of this study illustrate that the object-oriented method has distinct ability for dealing with mixed pixels, it obtains a higher overall accuracy of 92.3% and Kappa coefficient of 0.86 comparing with other traditional classification method results. The change detection results show the area of water, grassland and mudflat vary significant, also with remarkable transformation among other different wetland types. The result of this study have profound meaning for the protection of migratory bird habitats and maintenance of wetland ecological harmony on Poyang Lake. Keywords: Object-oriented classification, GF-1,Poyang Lake
Preliminary Study on Vegetation Index of Biotic Integrity (V-IBI) Assessment for Poyang Lake Wetland XU Liting Jiangxi Normal University
An index of biotic integrity (IBI) is a widely and frequently used approach for assessing ecological integrity of wetland, this method is easy to implement and highly robust, and the output is easy to be understood by the public. Poyang Lake Wetland, as the Wetland Nature Reserve of Jiangxi Province, plays an important role in biodiversity protection. A preliminary vegetation based index of biotic integrity (V-IBI) was developed by means of data collected from 30 sites in Poyang Lake Wetland in the autumn of 2015. 49 candidate vegetation metrics were tested for their ability to discriminate between the least disturbed condition and impaired condition. 8 metrics were eventually selected, and then they were transformed into uniform scores using the ratio score method, the sum of the metric scores at a site becomes the V-IBI scores. Based on the 95% percentile of value in all sites, the criteria of health ranking is determined. The distribution range below 95%
percentile is divided into 4 quarters. Result shows that among all sites, 6 were healthy, 6 were sub healthy, 11 were good-to-fair, 5 were fair and 1 was poor. Correlation analysis shows that V-IBI value is related to water quality, qualitative habitat evaluation index (QHEI) and landscape development intensity (LDI). The result suggested that the V-IBI approach was feasible for assessing the health of Poyang Lake Wetland. Keywords: V-IBI; ecological integrity; health assessment; Poyang Lake Wetland
Spatial-temporal Pattern of Vegetation Index Change and The Relationship to Land Surface Temperature in Zoige CHEN Zheng Beijing University
The Zoige wetland is the largest alpine peat wetland in China, and it has been degrading since 1960s. MODIS Enhance Vegetation Index (EVI) and Land Surface Temperature (LST) products in late august from 2000 to 2014 were employed to explore vegetation index and land surface temperature change tendency and to perform Temperature Vegetation Dryness Index (TVDI). The correlation between the annual mean of EVI and annual mean of LST was also calculated at pixel scale. The main purpose of this study is to explore the relationship between wetland degradation and climate change. The main conclusions are as follows: (1) Average EVI in Zoige plateau tended to be decreasing from 2000 to 2014, especially after 2007. In wetland areas, the annual mean of EVI were negative, while the slope were positive. It showed that the water storage of wetlands in Zoige plateau had been decreasing in the past 15 years and will keep decreasing in the future. (2) Overall, LST in the whole Zoige plateau had been increasing since 2000. While the minimum TVDI increased from 2000 to 2008 and then decreased. The change of TVDI suggested that drought should be a main factor that lead to wetland degradation in Zoige. (3) The uneven distribution of the correlation between EVI and LST suggested that LST is also one of the main reasons of wetland degradation. Keywords: Wetland Degradation, Vegetation Index, Land Surface Temperature, Zoige
Session 3: Land Use/Land Cover Change and Ecological Security (S3) Simulation of Land-use Change in the Poyang Lake Region Based on CA-Markov Model HU Bisong Jiangxi Normal University
Taking the Poyang Lake region as an example, we applied the Logistic regression to calculate the driving effects between the various factors and the land use types, and by combining the Markov method and the Cellular Automata model, built up the CA-Markov model fit to of simulating the land-use change in the Poyang Lake region. Furthermore, we finished the precision tests of the proposed model and predicted
the developing trends of the land-use change in the region. This study had the following conclusions: 1) The variation of the land use types in the Poyang Lake region had an obvious ascending trend from 2000 to 2010, the grassland was the most active land-use type, the area of the cultivated land had sharply declined, and the expansion of the residential land kept stable. 2) The driving directions and the explanatory abilities of the different factors influencing the various land-use types had significant differences, and the overall explanatory effect was satisfying with all the ROC values higher than 0.81. 3) The CA-Markov model had an overall Kappa index higher than 0.85 and an overall precision index over 75%, which indicated the model had a high-precision simulation effect, and especially performed better effects in simulating the changes of the woodland，cultivated land and water. 4) The variations of the land-use types in the Poyang Lake region increased from 2010 to 2025, but their active levels had a stable trend. 5) The area decreasing of the cultivated land and woodland were mainly caused by the area increasing of the residential land from 2010 to 2025, the land-use changing pattern performed a significant one-way transmission trend from other land-use types to the residential land, and the regional urbanization accelerated obviously which mainly distributed in the Nanchang-Jiujiang metropolitan area. 6) The area decreasing of the grassland and unused land mainly focused on the boundary areas of the counties from 2010 to 2025, the regional urbanization had nice measures for the grassland protection, but still could easily cause the wasting of the cultivated land and woodland. Keywords: land-use change; Logistic regression; CA-Markov
Changing land use and its impact on the habitat suitability for wintering Anseriformes in China's Poyang Lake region TANG Xuguang, Chinese Academy of Sciences
As an internationally important wetland for migratory waterbirds, China's Poyang Lake region has experienced substantial changes in land use during the past two decades owing to climate change and anthropogenic disturbances. Recent dam constructions on the Yangtze River and its tributaries for agriculture and hydroelectric power exert strong effects on the hydrological regimes of this lake. However, few studies have investigated how the land-use changes through time affect the habitat suitability for wintering Anseriformes—the largest community in this region. Thus, it is necessary to timely monitor changes in the habitat quality and understand the potential factors that alter it. In this study, three periods (1995, 2005 and 2014) of typical environmental indicators that have direct impacts on foraging and resting for the Anserformes, including proximity to water (density of lakes, rivers and ponds), human disturbances (density of residences and various road networks), preferred land cover types and food availability (NDVI), are integrated to develop a habitat suitability index model for habitat mapping. The results indicate that long-term lake shrinkage in low-water periods led to greatly expanded wetlands in these years, which provided more suitable habitat for migratory waterfowl. The amount of highly suitable habitat in 2014 was nearly twice
as much as in 1995. Recent survey data from 1997 to 2013 also revealed an increase in the population size, and confirmed the improvement of habitat suitability in the Poyang Lake region. Spatial analysis revealed that land use changes contributed most to the improved habitat coverage between 1995 and 2014. However, the relative significances of these transformations for highly suitable and moderately suitable habitats are strikingly different. Increases in wetland and paddy field area are the main reasons for explaining these improvements, respectively. The framework model proposed in this study will help governments to evaluate habitat conservation and restoration for protecting waterbirds in a spatially explicit way. Keywords: habitat suitability; remote sensing; biodiversity;
C, N and P stoichiometry in different organs of Vitex rotundifolia in a sandy hill along Poyang Lake ZHOU Hongyan Jiangxi Normal University
There are some sandy hills distributed along Poyang Lake that belong to typical southern desertification. As located in subtropical climate zone, the sandy hills differed in vegetation and soil from northern deserts. During the past 30 years, Vitex rotundifolia was successfully introduced in these sandy hills for vegetation restoration. In this study, different organs (e.g. flowers, leaves, twigs, creeping stems, fine roots) of Vitex rotundifolia were sampled along desertification intensity gradient in Duobao sandy hill, Poyang Lake. Subsequently, carbon(C), nitrogen (N) and phosphorus (P) of various organs were measured. The objectives were to (1) clarify the responses of C, N and P stoichiometry of Vitex rotundifolia to desertification intensity variation, and (2) determine the C, N and P stoichiometric relationship among the organs. The results showed C, N and P content of different organs ranged from 378.9 to 475.7 mg•g-1, 5.41 to 36.59 mg•g-1 and 0.62 to1.74 mg•g-1, respectively. The maximum N and P content were found in flowers. Moreover, organs, rather than desertification intensity mainly controlled the C, N and P content and their stoichiometry variability. Irrespective desertification intensity, N:P stoichiometry of Vitex rotundifolia maintained relatively stable. In addition, significant correlations of C, N and P among organs were mainly found in the above-ground parts. For example, C, N, P contents in twigs were all significantly correlated with that in creeping stems. For the underground parts, the contents of P and C:P ratio in fine roots were significantly negatively related to that in the twigs. Keywords: Poyang Lake; Sand hill; Plant organs; Nutrient; St
The study of spatial-temporal land use change in Poyang lake desertification area QIAO Huijiao Jiangxi Normal University
It has a significant importance to evaluate temporal and spatial characteristics of land use in desertification areas on ecological treatment, rehabilitation and
sustainable development. Based on Landsat TM/ETM+ image data, using the theory and method of landscape ecology, the paper analyses land use dynamic in Poyang Lake desertification area from 1980 to 2010 at the four aspects: Land use distribution，Land use transfer，Changes of the dynamic degree of different land use ， Landscape dynamic of each land use type. The results show that: (1)The number of land for ecology is gradually diminishing, but an increasing number of production land in the study area for the 30 years ;(2) Six land use types are always transferring, but there is a significant difference between different periods. From the year of 1980 to 2000, the amount was smaller, after the year of 2005, land use types transfers more frequent, and the amount and rate of transferring are the largest. The most obvious is the building-land which mainly transfers from cultivated land. (3) In addition to waters, the patch density of other land use types are increasing, and the average area and settlement landscape are decreasing. The entire study area landscape pattern presents the trend of " The large amount but small pieces ". Keywords: desertification area of Poyang Lake; land use; spatial-temporal
Session 4: Ecological Security and Environment Monitoring Technology and Application (S4) Research on Poyang Lake abnormal flooding by ultra WAN Zhiwei Jiangxi Normal University
It is one of the important directions in the global change research that the reconstruction of time serial of paleoflood and the flood peak flow or the scale of flood. This may caused by the reason that it is very hard to find long time serial of paleoflood deposition or slack water deposition. And the common paleoflood deposition may had interruption or low resolution which may resulting in bad reconstruction results. In this research, fluvial floodplain deposition from GJ profile were processed to reconstruct the Poyang Lake abnormal flooding by ultra-high resolution recording for the last 140 years based on the time scale of AMS-14C+137Cs/210Pb and a number of size indicators and parameters such as average particle diameter, median diameter, sand and coarse silt components (sand and coarse silt)/(clay + fine sand), C-M diagram, cumulative frequency curve and probability curve. With the ultra-high resolution recording, about 0.3 yr per sample, we can compare the abnormal flooding in Poyang Lake region to the ENSO, and these results can be induced. 1) Precipitation since meteorological records and deposition recorded reflect abnormal flood time have a good consistency in the years with probability density Keywords: Poyang Lake; sediment size; records of flood; ultr
Research on Rainstorms Events in Poyang Lake Basin ZHAN Mingjin
Climate Center of Jiangxi Province Based on daily precipitation data (1961-2014) from 81 meteorological stations over Poyang Lake Basin, the 50mm of effective daily precipitation is selected as the rainstorm threshold. The regional rainstorm event is defined as a precipitation event which exceeds the threshold on continuous area at a given time scale. By taking the spatial and temporal continuity characteristics of rainstorm events into account, Intensity-Area-Duration (IAD) method is applied to study the features of rainstorm events at different duration and the population/GDP exposed to rainstorm events. The research findings show that: 1) The top 3 years of the highest number of rainstorm events are 1999, 1983 and 1996. 2) The coverage of rainstorm events has increased during 1961-2014 significantly and the top 3 years are 1998, 2010 and 1999. 3) The population and GDP exposed to rainstorm events have shown a significant increasing trend. The exposed population reached 34.64 million people in 2010. The exposed GDP reached 4.86 billion Yuan in 1999. Keywords: Rainstorm, IAD method, Exposure, Poyang Lake
Characteristics of aquatic bacterial community and the influencing factors in the Ganjiang river WANG Peng Jiangxi Normal University
Bacteria play a critical role in environmental and ecological processes in river ecosystems. We studied the bacterial community in the Ganjiang River, a major tributary of the Yangtze River, as it flowed through Nanchang, the largest city in the Ganjiang River basin. Water was sampled at five sites monthly during the wet season,
and
the
bacterial
community
was
characterized
using
Illumina
high-throughput sequencing. A total of 811 operational taxonomic units (OTUs) were observed for all samples, ranging from 321 to 519 for each sample. The bacterial communities were maintained by a core of OTUs that persisted longitudinally and monthly. Actinobacteria (41.17% of total sequences) and Proteobacteria (31.80%) were the dominant phyla, while Firmicutes (mostly genus Lactococcus) became most abundant during flooding. Temperature and flow rate, rather than water chemistry, were the main factors influencing the bacterial community in river water. Temperature was the best individual parameter explaining the variations in OTU abundance, while flow rate was the best individual parameter
explaining
the
variations
in
phylum
abundance.
Except
for
Proteobacteria, the relative abundance of bacterial phyla did not differ significantly between sites, and the degrees of influence of urban landscape on the bacterial community were estimated to be 17%–34%. Keywords: Ganjiang river; high-throughput sequencing; water
The Efficiencies and Their Changes of Jiangxi’s Cities Employing DEA and Malmquist Index Models LIAO Chuanqing Jiangxi Normal University
Spatial pattern of cities has a typical effect on the cities’ efficiencies. Jiangxi has experienced unprecedented urbanization over the past decades, resulting in a great change of its cities’ scale. By employing the models of DEA and Malmquist Index, this paper estimates the efficiencies and their changes of Jiangxi cities from 2001a to 2010a. The conclusions can be drawn as follows: 1) while only three cities’ efficiencies prove to be DEA efficient, the overall efficiency of Jiangxi Province proves to be DEA inefficient and moves towards the optimal production efficiency, and there is great room for improvement of urban management and development scale. 2) The city efficiency growth rate of Jiangxi Province slows down and there is still a huge gap between the city and town scale of Jiangxi Province and the optimal production efficiency. 3) Benefited from expansion of the city and town scale, allocation of the city and town development elements by city and town administrators and improvement of the administration level, the city efficiency growth rate in South Jiangxi is faster than that in North Jiangxi. 4) This research divides the 11 cities in Jiangxi Province into three types, namely cities and towns with increasing returns to scale, cities and towns with unchanged returns to scale and cities and towns with varying returns to scale, according to their returns to scale, and puts forward relevant improvement methods. Keywords: DEA-Malmquist model, urban efficiency, urban patte
Maximum entropy model versus remote sensing-based methods for extracting snail habitats in Poyang Lake zone ZHANG Zhijie Fudan University
Objective Exploring the technique of maximum entropy model for extracting snail habitats in Poyang Lake zone. Methods Snail habitats information and related environment factors collected in Poyang Lake zone were integrated to set up the maximum entropy based species model and generate snail habitats distribution map; Two Landsat 7 ETM+ remote sensing images of both wet and drought seasons in Poyang Lake zone were obtained, where the two indices of modified normalized difference water index (MNDWI) and normalized difference vegetation index (NDVI) was applied to extract snail habitats; ROC curve, sensitivities and specificities were applied to assess their results. Also, the importance of the variables for snail habitats were analyzed using Jackknife approach. Results Evaluation results showed that areas under receiver operating characteristic curve(AUC) of testing data by remote sensing-based method was only 0.56, sensitivity and specificity were 0.23 and 0.89 respectively. Nevertheless, which of maximum entropy model was 0.876, 0.89 and 0.74 respectively; The main concentration of snail habitats in Poyang Lake zone covered northeast of Yongxiu county, northwest of Yugan county, southwest of Poyang county and middle part of Xinjian county, and elevation was the most important environment variable affecting the distribution of snails, next is land surface temperature(LST). Conclusions Maximum entropy model was proved more reliable and accuracy than remote sensing-based method for the sake of extracting snail habitats, which had certain guiding significance for the relevant departments
to carry out measures to prevent and control high-risk snail habitats. Keywords: Oncomelania hupensis; Poyang Lake; Maximus entropy
Carbon dioxide and methane fluxes from Poyang Lake determined by eddy covariance technique MIAO Yuqing Anhui Normal University
Recent evidences have shown that boreal and high latitude lakes emit substantial amount of carbon dioxide (CO2) and methane (CH4) into the atmosphere. However, little is known about the patterns of CO2 and CH4 fluxes from large lakes in sub-tropic region. In the present study, fluxes of CO2 and CH4 were measured using open-path eddy covariance (OPEC) method at a sub-tropical lake (Poyang Lake) in China. Firstly, the performance of OPEC instrumentation was evaluated according to FLUXNET standard procedures. The integral turbulent tests suggested that the quality of raw data obtained by the OPEC instruments satisfied fluxes calculation. The co-spectra and power spectra analysis suggested that the effects of instruments including sensors separation, the dynamic frequency response of the sonic anemometer did not restrain the high-frequency fluctuations. The energy balance closure of Poyang Lake reached 64% without consideration of water and soil heat indicated that it was valid for assessing the quality of fluxes. Then, CO2 and CH4 fluxes were calculated as 30 min block-averaged covariances between the scalars and the vertical wind velocity according to commonly accepted procedures. The mean flux of CO2 during the measurement period of 2015 was -0.09 µg m-2 s-1, indicating that Poyang Lake acted as net sink of CO2. Distinct diurnal variation of CO2 has been detected, which experiencing carbon release in nighttime and carbon uptake in daytime with the maximum usually reached between 12:00 and 14:00. Unlike other ecosystems, monthly CO2 emissions during the summer and CO2 absorptions during the spring and autumn were observed. The possible explanation was that Poyang Lake experience two growing seasons in the spring and autumn. Furthermore, Poyang Lake acted as net source of CH4, and the measured flux averaged over the observation period (0.05 µg m-2 s-1) was much higher that from boreal lakes. Due to the equipment malfunction, we could not obtain enough data to explore the actual relationships between CO2 and CH4 fluxes and lake limnological parameters or environmental factors. Overall, more endeavor should be made to obtain high-quality data to distinguish the determinants on lake CO2 and CH4 fluxes and to accurately evaluate the gaseous carbon budget of Poyang Lake on an annual basis. Keywords: Wetland, Poyang Lake, eddy covariance, methane
A Design of Fixed Wing UAV based on Ardupilot YAN Jilin, YANG Liu Jiangxi Normal University
This paper is based on the open source flight control: Ardupilot, to design a low cost, efficient operation of fixed wing UAV. It contains the power system, radio data
transmission system, the ground station system, positioning system, etc.. Map survey tasks can be applied to wetland landscape changes of typical areas of Poyang Lake. Keywords: UAV, APM, Ardupilot, Map Survey
Research on Inversion Model of Pulverized-coal Concentration of Water Body in Coal Mine Based on Measured Spectrum HU Xin Northeastern University
In recent years, remote sensing has been used widely as a important vehicle for the aquatic environment monitoring, while less researches on water suspension are being conducted aimed at the con-centration of pulverized coal in the mining waters. In this article, several water samples containing various concentration of pulverized coal have been tested, utilizing the portable spectrometer, and we obtained their spectrum in the visible and near infrared band, simultaneously. Analyzing the relationship between the spectral characteristics and concentrations of samples, we have drawn the following conclusions: specifically, with the pulverized-coal concentration increasing, the spectral reflectance of samples is gradually reduced, while a distinct absorption valley in 740 nm band were discovered for spectral curves of diverse water samples, which proven to be a close relation a close relationship between the coal content and absorption depth. On the basis of the analyses above, a linear correlation model, involving two variables-Spectral Absorption Index and Concentration of pulverized coal is constructed as a remote-sensing inversion model for backcalculating the content of pulverized coal in water body. Validation results indicate that the model is of high inversion precision and its average relative error is 6.3%, suitable for pulverized-coal concentration of samples ranging from 200 milligrams per liter to 700 milligrams per liter. The results of our investigation will provide neoteric perspectives into the field of water quality surveillance by remote sensing in coal-mining districts. Keywords: coal mine; water quality surveillance; pulverized-coal suspension; spectrum; inversion model
Nanjishan Wetland Reserve Landscape Aanalyse Using Polarimetric Larmetric Radarsat-2 Data SHEN Guozhuang RADI, Chinese Academy of Sciences
This paper analysis the landscape of Nanjishan Wetland Reserve using RADARSAT-2 polarimetric SAR (PolSAR) data acquired on March 24, 2010, April 7, 2013, April 4, 2015 and March 19, 2016. H-A-Wishart polarimetric SAR data classification method was used to classify the PolSAR data. Then, the landscape was mapped based on the classification result. The landscape was compared to the landscape retrieved from the Landsat ETM+ data acquired on Dec. 26, 1999. To quantify the landscape pattern, some representative indices in entire region and different patch type scale were selected to analyze the wetland landscape. The result shows that RADARSAT-2
PolSAR data are suitable for landscape mapping in Poyang Lake Wetland. According to the analysis of driving forces, seasonal changes in water levels were the main influences on changes in the wetlands landscape. Keywords: PolSAR, Wetland, Landscape, Landscape indices
CO2 Flux changes in the Nanjishan wetland YANG Tao Jiangxi Normal University
Poyang Lake’s water rises and falls annually. Usually it increases in April to May, and decreases in August to September. During the ascending period, rainny days depress the local vegetation processing the photosynthesis. It is harder to store nutrition, and easier to consume. Meanwhile the water buries the plants, with the water rising, plants couldn’t obtain enough oxygen and experiences the choking phase. CO2 discharge first decrease, then Increase, and decrease at the last, till the net ecosystem exchange reduce and maintain to a low level. Plants remain respiration, however, its exhaled CO2 dilute and spread in water. On the opposite, during the descending period, survival plants begin slowly to recover. CO2 discharge increase first, then decrease, and back to the normal flucation. When the water level rises near/over the vegetation’s leaf canopy, the CO2 flux is affected intensively. Local vegetation has adapted to the Long-term and regular inundation. Keywords: CO2 flux
Ecological risk pattern of Poyang Lake basin based on land use XU Yu Jiangxi Normal University
The ecological impact of different land use types and intensity could reveal on regional ecosystem structure changes directly, and the changes of structure and function of land ecosystem would profoundly affect regional ecosystem health. Therefore, ecological risk assessment in terms of landscape structure is an effective method to study regional ecological risk pattern. Poyang Lake, the largest freshwater lake in China, plays an essential role in biodiversity protection and water ecological security in Yangtze River basin. However, irrational development and construction activities have resulted in significant landscape changes in recent years, which may aggravate regional ecological risk. This study takes Poyang Lake basin as a case study to explore the impact of land use change on ecological risk. Based on an ecological risk assessment model derived from land use structure, the study tries to explore ecological security pattern and provide a scientific reference for optimizing land utilization in Poyang Lake basin. The characteristics of land use changes in Poyang Lake watershed were analyzed quantitatively based on land use data during 2005—2013. Then, the spatial-temporal variation of the ecological risk and the relationship between ecological risk and terrain factors were investigated by GIS techniques. The result shows that about 9.2% of the total areas experienced land use changes, which 68.5% occurred among farmland, construction land and forests. The major types of land transformation are mutual conversion between
forests and farmland, and the conversion of farmland to construction land, showing a remarkable trend of non-agricultural transformation. The average ecological risk index (ERI) increased from 0.237 in 2005 to 0.246 in 2013, probably as the consequence of farmland reduction and rapid expansion of construction land. The ERI showed a positive spatial autocorrelation and obvious local spatial clustering, and generally decreased significantly from north to south. . Based on the spatial interpolation of ERI, the study area was divided into five grades: low risk region (ERI Keywords: ecological risk; land use; spatial pattern; Poyang
Design and Research Monitoring Database
of
Jiangxi
Provincal
Ecological
Security
ZHANG Caixia Jiangxi Normal University
This paper briefly analyzed the characteristics of ecological security monitoring data in Jiangxi province and key technologies for construction of ecological security monitoring database. The paper is to regulate, summarize and integrate various types of existing historical data and real-time monitoring data, and to achieve security storage and seamless management of massive spatial data and attribute data with the geospatial data interface of integrated "space-air-ground". The system realized the real-time inquiry, data maintenance and management functions of ecological security monitoring data in Jiangxi province, which provide data support for water ecological security, regional ecological security of land use pattern, ecological environment and natural disasters and other scientific researches in Jiangxi. Keywords: Jiangxi province; ecological security; integrated
Ecological Risk and Development Protection of Main Industries in Gannan DAI Xingzhao，,XIA Yu Mountain Rivers and Lakes in Jiangxi Province Commission Office
Gannan is the main biological protective screen of Chang River and Zhuang River catchment because it is located in headstream area of Ganjiang River and Dongjiang River. Soil erosion has been a serious problem for decades in this area. During the last 20 years, the blooming development of mineral and fruit production has increased the ecological risk. This paper focused on environment hazard caused by mining and fruit production, strengthened the necessary of ecological protection, and proposed green development idea. This study is aim to achieve the environmental protection goal of “both the protection and development, protection of priority” in Gannan area. Key words: Gannan area; Ecological risk; Green development
Session 5: Ecological Security and Economy Development (S5)
stimate the spatial and temporal patterns of ET in Poyang Lake basin LIU Chong Jiangxi Normal University
The Main objective of the study is to estimate the spatial and temporal patterns of ET in Poyang Lake basin and quantitatively evaluate the impacts from different factors. We producted a long-term (1983–2011) ET record and investigated multidecadal changes in evapotranspiration and underlying causes in Poyang Lake Basin with the use of WaSSI-C ecosystem model, which was driven by meteorological data, leave area index data and basic soil parameter data. The modeled ET results were validated at different spatial scales and exhibited overall reasonable accuracies. Over the 29-year study period, ET record showed an upward global trend of 1.495 mm a-1. The non-parameter Mann-Kendall test showed that there was an increasing mutation in the year 1992. Substantial variations were also detected in the spatial patterns of multi-year mean ET value (741~914 mm) and its dynamics (-0.64~4.21 mm a-1). Our factorial analysis further indicated that all changes of vegetation, precipitation and air temperature will lead to the positive ET responses while the joint effect of precipitation and air temperature will lead to a negative ET response. The overall upward trend of ET was largely derived from the contribution of vegetation restoration while climate change, on the other hand, primarily explained its inter-annual variation. Keywords: Evapotranspiration, Spatiotemporal pattern, Climat
Developing a Vegetation-Based Index of Biotic Integrity to Assess the Ecological Health of Poyang Lake Wetland, China YANG Wenjing Jiangxi Normal University
Ecological health assessment can provide indispensable information for wetland protection and management. Poyang Lake is the largest fresh-water lake in China. The wetland is recognized as one of the most important wetlands in the world because it provides habitats for many unique species and its great ecological and economic importance to millions of people in the middle and lower Yangtze region. Currently, there is no indicator framework to determine the status and trends of Poyang Lake wetland condition at a basin scale. The index of biotic integrity (IBI) is the most widely-used method for wetland monitoring in North America. Plants are well-suited as indicators of ecological health because they are immobile and respond to anthropogenic disturbance on an ecological time scale. In the study, we aim to develop a vegetation-based index of biotic integrity (V-IBI) and to assess the health condition of Poyang Lake wetland. V-IBI was based on samples at 30 sites that were randomly selected. Metrics related to plant richness, composition, life form and disturbance tolerance were screened by sensitivity and redundancy tests. Five metrics were finally included in the V-IBI framework. The V-IBI scores were obtained by combining the rating categories (excellent, good, fair, poor, and very poor). The general ecological status of Poyang Lake wetland was rated lower than “good”. Sites in nature reserves were rated as the best, while those close to
intensive farming lands and big cities were the worst. The V-IBI provides a useful tool for long-term ecological monitoring in Poyang Lake wetland. Keywords: ecological health; Index of biotic integrity; plan
Multi-scale variability of water discharge and sediment load in Poyang Lake during 1956-2014 HE Lei Jiangxi Normal University
On the basis of situ data observed at six stations in Poyang Lake from 1956 to 2014, the regional differences and abrupt changes of water discharge and sediment load are divided into different phases using the methods of order clustering. The abrupt change of water discharge and sediment load into Poyang lake is in 1992, and that of out of Poyang Lake is in 1969. Discharge of out of Poyang Lake decreased insignificantly from 1985 to 2014. The characteristics of the periodicities of water discharge and sediment load of Poyang Lake are studied by using power-spectrum, cross-wavelet analysis. The periodic oscillations of water discharge and sediment load into and out of Poyang Lake are found at inter-annual scale and decadal scale. The significant correlation coefficients between water discharge and sediment load into Poyang Lake occur at the scales of 0.3a，0.6-1.2a and 3.3-8.3a; While that of out of Poyang Lake occur at the scales of 0.5a, 0.8-1.2a and 5.3a. The phase characteristics of water discharge and sediment load are related to the precipitation and human activities; after the 1980s the decreases are mainly induced by human activities, especially due to the use of the reservoirs, water diversion and engineering projects related with soil and water conservation. Moreover, the inter-annual and decadal fluctuation of water discharge and sediment load of Poyang Lake are caused directly by the oscillation of the precipitation at the drainage basin, and the rudimentary mechanism of multi-scale fluctuations are due to the northwest Pacific subtropical high, whose location oscillates in inter-annual and decadal periods. Keywords: water discharge and sediment load; multi-scale osc
Rethinking the Land policy of returning farmland to lake around Poyang Lake, China XIE Zhenglei Jiangxi Normal University
Rethinking the Land policy of returning farmland to lake around Poyang Lake, China ZhengLXiea, Liu Yanga, Xiuxiu Zhanga, Shuhua Qia*, Junbang Wangb, Hua Zhanga a Key Laboratory of Poyang Lake Wetland & Watershed Research, Ministry of Education (Jiangxi Normal University), School of Geography & Environment, Jiangxi Normal University, Nanchang 330022, P.R.China ； The Collaborative Innovation Center for Major Ecological Security Issues of Jiangxi Province and Monitoring Implementation; bKey Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China Since the 1998 Yangtze River basin flood, the government has
proposed the policy of "returning farmland to lake" (RFTL) in Poyang Lake to restore the lake’s ability to mitigate flooding. Due to the implemented ecological restoration policies, significant changes have taken place in land use patterns and people's livelihood. This study combined remote sensing images with a household survey to investigate land-use status, agricultural status, the transfer of farmland and the driving forces behind farming activities in the "double levee" (such as the water level caused by the operations of the Three Gorge Dam, sand mining, livelihood, and soil quality). The land in the “double levee” of the Poyang lake area embodies the universal phenomenon of farming and aquaculture. The current land use types in the levees do not function as wetlands. Thus, it is necessary to re-examine the standard of “the complete levee” and to implement cultivated land treatment for the area that is not suitable for conducting “double levee” activities to the cultivated land. Thus, we should implement national agricultural subsidy policy based on “double levee” land usage policy. Keywords: Returning farmland to lake; Land use policy; Agric
The Present Situation，Problems and the Measures GAN Jiangying Nanchang Academy of Social Science
In recent years, Jiangxi agricultural industry to "green emerging" for the development of the concept, to "hundred county, hundred garden" for the upgrading of the carrier, up to now modern agriculture of Jiangxi has been enlarging, but compared with other provinces in the middle reaches of the Yangtze River, Jiangxi agricultural is big but not strong, and is relatively poor efficiency. In present situation, it has not been fundamentally changed. Therefore, Jiangxi must attaches great importance to the intention to build the industrial chain of agriculture, promote the transformation and upgrading of agriculture, coordinate the work of agricultural supply side structural reform. Keywords: Jiangxi, agriculture, "green emerging"
Characteristics of household-based rice cropping systems and its responding strategy in the Poyang Lake Region XIAO Chiwei Jiangxi Normal University
Researching the differences and spatial characteristics of household decision behavior in rice cropping systems is the basis of the put forward coping strategies, the key to know the rules of the paddy rice dynamic change and maintaining regional food security. With the methods of field study and statistic analysis as well as the basis of questionnaires of 402 farmer households in Poyang Lake Region (PLR), we got the following results: (1) Spatially, both rice types were distributed across the study area but showing a general distribution feature, with single- and double cropping rice in the northwest and southeast part respectively. (2) Household decision of rice cropping systems vary in different parts of the PLR, the double- rice cropping system was still the dominant type, about 63.57% of the
respondent households in the PLR cultivated double cropping rice. However, the multiple cropping index of paddy rice is only 154.9%. Based on the above findings, the government should guide the farmers’ paddy field cultivation behavior by increasing comparative efficiency of rice production, promoting appropriate scale operation and conversion of land and optimizing the rice planting conditions to improve cropping index and enhance food provision service. And then the improvement of land use efficiency and sustainable use of land resources. Keywords: rice cropping systems; responding strategy; househ
Effects on Perception of urban built environment on walking behavior WU Yan Jiangxi Normal University
It has been an important goal of urban construction to meet people safe, convenient, comfortable walking travel demand, especially in the context of rapid growth of motor vehicles, within walkability has become an important criterion for reflection of low-carbon travel and street vitality. North American cities use walkability index measurement methods to measure derived walk within walking distance of the city provides a standard level, while the domestic research has just started. Nanchang is in the change of transition rail transit construction and development of urban green. As the major city of Poyang Lake Urban Agglomeration, improving the environment for walking and the walking trip rate can reduce urban carbon emissions. It has a great influence on promote the Poyang Lake Ecological Protection. Our data came from 2 ways, questionnaire and GIS. Firstly, based on The Rail Transit Line, we choosed 3 station and delimited their 800 m radius as the study sample region. Combined with the specific circumstances of Nanchang, modify and develop community walking environment scale. The scale can be a questionnaire to obtain the results of the built environment perception residents. It includes the week of travel memories、basic personal information (height and weight, age, income level ， education) 、 while walking one week intensity physical activity 、 psychological measurement、 neighborhood facilities、long perceived neighborhood environment. Secondly, based on the principle of walkability measurement using, GIS is used to process and compute for data, to get the walk-scores of the starting point of neighborhood, and through spatial interpolation to visualize the expression of the walkability measurement results. Through research questionnaires and statistical methods such as observation, the effectiveness of the method is certified to measure the walkability. The measure results including the walkability of neighborhood on the overall and the blocks of the neighborhood were analysised and comparied. We can compare the strength of association of objective and subjective measures of environment with walking sufficiently for health. Finally, according to the results of Nanchang improve pedestrian environment and the health of urban construction advice in the hope of improving the Poyang Lake Ecological helpful. Keywords: built environment ,walking, Low carbon
Session 6: Regional Development Sustainable Use of Resources (S6)
and
Process and characteristics of recession of Poyang JIA Yulian Jiangxi Normal University
As one of the largest lake-wetland morphological units in Asia, Poyang lake has attracted great concern on hydrological and environmental changes. Controversy about the details of birth, evolution and recession of Poyang Lake during the Holocene that continue to this today, which involve the development strategy of regional environment, and will deeply influence the regional society and human activity, are a focal problem of the regional environmental change. Based on AMS-14Corg and 137Cs/210Pb dating methods, this paper analyzes characters of the sedimentary facies and grain size of 16 sedimentary sections on the floodplain of Poyang Lake between 15-19 meters a.s.l(the Yellow Sea elevation system) and reveals that: 1）Poyang Lake might be at one stage of the Holocene enlarging during the little ice age(A.D.1400~A.D.1900).For many sedimentary sections at that period were lacustrine facies ,which suggested that the high degree of spatiotemporal variation of modern Poyang lake was not significant at that time. At the beginning of the twentieth century, Poyang Lake started to shrink when sedimentary
stratigraphy
changed
into
floodplain
facies.
Thus,
the
large
spatiotemporal hydrological variation like the modern Poyang Lake has become more and more significant. 2) Sedimentary stratigraphy on the floodplain presents a trend of grain-size coarsening during the past century, indicating a gradual recession (or drought) of Poyang Lake. A high-resolution sedimentary record reveals that this process was made up of two grain size cycles of fine to coarse. One is from A.D. 1900 to A.D. 1970, the other from A.D. 1970 to the present day. And in c.a. A.D.2005, a few sections indicated a abrupt change of grain size, corresponding to a abrupt shift of the lake state. Based on comparative analysis of granularity of sediments and hydrological information, we suggests that annually longer time interval of exposure of floodplains brings about grain size coarsening of sediments. 3) Coarsening of grain size of floodplain deposits and hydrological situation of Poyang lake during the last 60 years indicate that Poyang Lake has come into being a rapid decline condition: both of high water level(>18 m) stage annually and low water level stage( Keywords: Poyang lake, Sediment, Coarsening of grain size
Preliminary study on benthic macroinvertebrate index of biotic integrity (B-IBI) for the health assessment in the Poyang Lake, China HUANG Qi Jiangxi Normal University
The water and habitat quality in Poyang Lake are being degraded by the global environmental change and anthropogenic impact. Thus, the need for standards, especially those examining the biological attributes of lake systems, are urgently
required. A preliminary benthic macroinvertebrate index of biotic integrity (B-IBI) was developed to evaluate the ecosystem health of Poyang Lake in winter by means of the data that were collected from 15 sites in October and January in 2012 to 2014 in the central of Poyang Lake. The method of the least disturbed condition was used to find the reference sites. Four metrics were selected from five categories (50 metrics). We then calculated the total MMI scores by summing metrics for each site after transformation by 0-1 scaling system. The final B-IBI include the total taxa number, (Crustacea+ Mollusca) taxa, the Berger-parker’s index and biotic index. Then the ecological conditions of the sampling sites were evaluated based on the B-IBI scores, which were transformed into a uniform score by ratio score method and summing up. Overall, the ecological conditions of references sites were “Good”, B-IBI scores were significantly reduced at impaired sites, where affected by anthropogenic impact. Health condition of center region in the Poyang Lake was found to decline gradually from 2012 to 2014．Sand mining and water pollution were suggested as the major factors affected B-IBI. Our results suggest that long-term data would benefit the development of a robust B-IBI and its use in practice of Poyang Lake health assessment． Keywords: benthic macroinvertebrate; IBI
A MODIS-based retrieval model of suspended particulate matter concentration for the two largest freshwater lakes in China CHEN Fangyuan , WU Guofeng Wuhan University, Shenzhen University
Suspended particulate matter concentration (CSPM) is a key parameter describing case-II water quality. Empirical and semi-empirical models are frequently developed and applied for estimating CSPM values from remote sensing images; however, they are usually region- or season-dependent. This study aimed to develop a
Moderate Resolution Imaging Spectroradiometer
(MODIS)-based
retrieval model of CSPM for Poyang and Dongting Lake together. The 89 CSPM measurements in Poyang and Dongting Lake as well as their corresponding MODIS Terra images were used to calibrate CSPM retrieval models, and the calibration results showed that the exponential models of MODIS red band and red minus shortwave infrared (SWIR) band at 1240 nm both explained about 76% of the variation of CSPM of Poyang and Dongting Lake together. When the two models were applied to the validation datasets, the results indicated that the exponential model of red band obtained more stable CSPM estimations with no bias at a significance level of 0.05 in both lakes. The MODIS red band-based model achieved acceptable results for estimating CSPM in both Poyang and Dongting Lake, and it provided a foundation for obtaining comparable spatiotemporal information of CSPM, which will be helpful for comparing, understanding, managing and protecting the two aquatic ecosystems. Keywords: Lake management; Water quality; Remote sensing; Empirical model
An Analysis of environmental factors impact on oncomelania snails in
Poyang Lake
RAO Didi Jiangxi Normal University Oncomelania is the only intermediate host of schistosoma, It has important significance to control the spreading of schistosomiasis and cure of oncomelania snails . This paper selects eight lake counties such as Poyang、Duchang、Xingzi、 Yongxiu、Xinjian、Nanchang、Jinxian and Yugan etc as the study area, 3S technology and the way of field research are used to monitoring oncomelania snails habitats and discussing its distribution based on the impact of environmental factors (vegetation index 、 humidity etc.);Using SPSS19.0 to analysis the correlation between environmental factors of schistosomiasis transmission and propagation of oncomelania snails. Our research result demonstrated:(1) 450 samples of snail distribution in bottomland is gathered, while the distribution of bottomland where have oncomelania snails is discrete, it appears that the distances between bottomland where have oncomelania snails and residential areas is inconsistent, The minimum average distance is 0.51km which is to Xingzi county, while the maximum is to Yugan county, the value of it is 3.1km; (2) More than 80% of the snail breeding grounds of vegetation index is between 0.100 to 0.375, Growth of snail is suitable for the average temperature range between 20 ℃ to 25 ℃, 94.5% of the snail area distribution in 14 to 17 m elevation (wusong elevation) of the bottomland; (3) The correlation between environmental factors (Humidity, vegetation index and elevation, temperature and other factors)and distribution of oncomelania snails appears parabolic or parabolic curve, the vegetation index affect the most significant. Environment factor analysis can provide basic data for remote sensing monitoring of oncomelania breeding sites . Keywords: environmental factors; schistosomiasis; 3S technol
Impacts from Human Activities on Sediments Budget in Poyang Lake QI Shuhua Jiangxi Normal University
Poyang Lake is the largest fresh water lake in China. The sediments disposition is important in providing medium for wetland vegetation and benthic animals. In this paper, the water discharge and sediment content gauged by the hydrostations in the main five tributaries(named as Gan River, Fu River, Xin River, Rao River and Xiu River)in Poyang Lake watershed were used to investigate the sediment budget in Poyang Lake. The following results was showed: (1) The total sediments loaded into Poyang lake from the main five tributaries was about 811.687Mt during 1955~2010, in which Gan River accounted for 59.7%, Xin River accounted for 13.7%, Xiu River accounted for 10.2%, Fu River accounted for 9.7 and Rao River accounted for 6.7%； (2) The annual sediments loaded into Poyang lake was mainly decided by water discharged into Poyang Lake. And the inputted sediments were synchronized to the water discharge seasonally. (3) Sediments loaded into Poyang Lake decreased sharply caused by reservoir interception, though forest coverage changes also contributed to the decrease of sediments; (4) The total sediments loaded into
Yangtze River from Poyang Lake was about 560.103Mt during 1955~2010. And it showed a decreasing trend during 1955~2000, but the trend was interrupted by the practice of sand mining in the new century; (5)Affected by the backflow from Yangtze River in flood period, sediments loaded into Yangtze River were asynchronous with water discharge seasonally. And the sediments loaded by the backflow from Yangtze River was reduced dramatically because of the emplacement of Three Gorges Dam;（6）The sediments budget in Poyang Lake was changed by sand mining. Sediments deposit was estimated about 1.408mm/a during 1955~2000, but outputted sediments showed greater than the inputted sediments during 2001~2010 because of the practice of sand mining. Keywords: Poyang Lake; Sediments budget; Reservoir
Effect Of Different Initial Density On The Growth Of Microcystis aeruginosa In Carex cinerascens Soaking Liquid LI Lin Key Laboratory of Poyang Lake Wetland and Watershed, Ministry of Education Jiangxi Normal University
The allelopathy of different initial densities on Microcystis aeruginosa in soaking liquid culture of Poyang Lake Carex cinerascens at 3 different immersion height were studied by batch culture. The results showed that, the different initial algal density of Microcystis aeruginosa were inhibited in every Poyang Lake Carex cinerascens soaking liquid, the maximum specific growth rate of initial density lower than 10 × 104cell/mL were higher than the control groups, the inhibition rate gradually decreased from the highest 88.8% to less than 50%, the specific growth rate and inhibition rate of Microcystis aeruginosa decreased with the increase of initial algal density in each experimental group. The reasons for this phenomenon might be, in the culture medium in the eutrophication, the growth of Microcystis aeruginosa were influenced by allelochemicals and nutrients in culture, The lower initial algal density were mainly affected by allelopathic, and allelopathy weakening then nutrient limitation strengthen with initial algal density increasing. This study revealed that the effects of plant soaking liquid on different initial algal density in eutrophic culture, the results provided a scientific basis for the effective controlled of water bloom. Keywords：Carex cinerascens; Microcystis aeruginosa
Effect of heavy metals in the sediment of Poyang Lake estuary on micriobial communities structure base on Mi-seq sequencing NI Caiying Jiangxi Normal University
A high-throughout miseq sequencing technology was used in this study to analyze sediment microbial communities from Poyang Lake estuaries including Xinjiang river (XS)，Raohe river (RS)，Xiushui river (SS) and Ganjiang river (GS) polluted by heavy metals, in order to understand how microbial community composition change response to heavy metals (Cu、Zn、Cd、Pb、Cr and Mn) . Results showed that contents
of Cu and Zn in RS and XS were significantly higher than those in other rivers (SS and GS), content of Mn was the highest in GS, and content of Mehlich-3 extractable Pb was the highest in XS. There was no significant difference for total Pb, total Cd, Mehlich-3 extractable Cd, total Cr and Mehlich-3 extractable Cr among four rivers. The microbial communities as explored by 16S rRNA gene sequencing were distributed into five broad taxonomic groups, mainly including Proteobacteria (32.54-50.35%), Acidobacteria (6.13-13.13%), Bacteroidetes (4.38-14.92%), Verrucomicrobia (6.42-10.70%) and Chloroflexi (3.21-11.73%). The microbial diversity index from SS and GS was much higher than that from the RS, while RS had much higher heavy metals than SS or GS. Correlation analysis showed that heavy metals had significantly correlation with 138 OTUs, and Cu and Zn had the most numbers of correlated OTUs classified to phylum or genus. In Proteobacteria, nine genera were positively related with Mehlich-3 extractable Cu and five positively related with Mehlich-3 extractable Cd, which may be the important species resources for restoration of heavy metals pollution. Keywords: Mi-seq sequencing；Soil microbe；Heavy metals；Poyang
Distributed Hydrological Model Environment Integration Research
Oriented
to
Virtual
Geographic
GU Suwen Jiangxi Normal University
Simulation of the lake watershed hydrological processes supported by scientific hydrological model, is an important method in the research of data acquisition and analysis, lake watershed ecological security monitoring. But traditional hydrological models are restricted by the format of the input data and the complexity of using the software, also in the application of universality, timeliness and convenience are limited. However, Virtual Geographic Environment can be used to simulate and analyze complex geological processes and phenomena, support collaborative work, knowledge
sharing
and
group
decision
in
integrated
Virtual
Geographic
Environment and work space. Which can solve the hydrological ecological safety of sudden and complexity. Proposed in this paper to SWAT hydrological model as an example to establish the Virtual Geographic Environment platform, simulation and visualization of hydrological process efficiently, provide multi-source data and multi-type user interaction and coordination, to maximize the use of data resources and data sharing results, provide service for the water environment monitoring and feedback. Keywords: Virtual Geographic Environment, Distributed Hydro
Dynamic assessment of the latest national schistosomiasis control program under uncertainty in the Yangtze River Basin, China, using a Bayesian spatio-temporal model ZHANG Zhijie Fudan University
Schistosomiasis still remains a major public health problem in east China,
particularly along the Yangtze River Basin. The latest national schistosomiasis control program (NSCP) was implemented in 2005, whose goal was to reduce the rate of infection to less than 5% and 1% by 2008 and 2015, respectively. The progress of the NSCP, however, might be challenged by presence of infected snails along the Yangtze River. In this context, assessment of this progress is urgently needed. In this study, we applied a Bayesian spatio-temporal model to describe dynamics of schistosomiasis risk in Guichi, Anhui Province, China, using annual parasitological and environmental data for the period 2005-2011. Predictive maps of schistosomiasis showed that the disease risk remains constant and low. Results of uncertainty analysis, in the form of probability contour maps (PCMs), indicated that the first goal of “infection rate less 5% by 2008” was fully achieved in the study area while the other goal was not during the current study period and more longitudinal data for schistosomiasis are needed for this assessment. Compared to traditional way of mapping uncertainty (e.g., variance or mean-square error), the PCM provides more realistic information in schistosomiasis control. Keywords: schistosomiasis, Bayesian spatio-temporal model,t
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Binjiang hotel is well connected with public transport. Guests can take taxi or bus to get to the hotel.
Nanchang is a historical city and famous for its natural and culture scenes. Including: -
The Bayi (August 1st) square The Monument of August 1st 1927 Nanchang Uprising Tengwang Pavilion Aixihu Wetland Park
Scenes of Nanchang
Transportation Variety of public transportation are available in Nanchang. Subway No.1 Line and bus routes are the most popular ways of public transportation in Nanchang.
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Currency & Currency Exchange RMB is the official currency. It is pegged to the US dollar at ￥6.66 is freely convertible. Traveler’s checks are honored at most banks, hotels and shops .Major credit cards are also widely accepted and ATM (ETC) facilities are widespread.
Weather Nanchang is humid subtropical monsoon climate, moderate climate, with mildly cold winter and humid summer. A T-shirt and light jacket is recommended for air conditioned restaurants and hotels. An umbrella is recommended in case of rain. The most updated information of weather can be found in the website of CHINA Observatory: http://jx.weather.com.cn/
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