Variation of water body in Dongting Lake from in situ measurements and MODIS observations in recent decades

作     者：Liu Yang Lunche Wang Ming Zhang Zigeng Niu Rui Yao Deqing Yu Chang’an Li Qiuhua He 

作者机构：Hunan Key Laboratory of Remote Sensing of Ecological Environment in Dongting Lake AreaSchool of Geography and Information EngineeringChina University of GeosciencesWuhanPeople’s Republic of China Key Laboratory of Regional Ecology and Environmental ChangeSchool of Geography and Information EngineeringChina University of GeosciencesWuhanPeople’s Republic of China Hubei Key Laboratory of Critical Zone EvolutionSchool of Geography and Information EngineeringChina University of GeosciencesWuhanPeople’s Republic of China Hunan Key Laboratory of Remote Sensing of Ecological Environment in Dongting Lake AreaHunan Natural Resources Affairs CenterChangshaPeople’s Republic of China 

出 版 物：《International Journal of Digital Earth》 (国际数字地球学报（英文）)

年 卷 期：2021年第14卷第8期

页      面：959-984页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：funded by the National Natural Science Foundation of China(grant numbers 41975044 41801021 41871019 41672355) 

主　　题：Dongting Lake dynamic changes driving factors Three Gorges Dam MODIS 

摘      要：Identifying the spatiotemporal dynamics of the water body in Dongting Lake,the second largest freshwater lake in China,is crucial for water resource *** this study,the variations of the water body were comprehensively analyzed based on remote sensing images and in situ measurements from 2000 to *** breakpoint detection approaches were integrated to analyze the change trends and explore the related driving forces behind the *** results showed that significant intra-and inter-annual fluctuations of the water body were found from 2000 to *** water area and volume decreased at rates of 1.26 km^(2)/a and 16.65×10^(6)m^(3)/a,*** the entire study period,the outflow at Chenglingji station(CLJ),the inflow from three outlets of the Yangtze River(Inflow2),and the inundation conditions during the last period(Arealag)made the largest relative contributions to the water area variation(around 25%,27%and 24%,respectively).A breakpoint was detected around 2004,corresponding to the operation period of the Three Gorges Dam(TGD).The regulation of TGD profoundly affected the hydrological characteristics at the three outlets and CLJ,and may have indirectly caused the water area to expand by 2.41 km^(2)/a during the dry seasons between 2004 and *** results provide valuable insight into how natural and anthropogenic factors affect water body variation and may offer a practical reference for the local government to adjust management strategies.