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《Acta Geographica Sinica》 2011-01
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Study of Ecological Instream Flow in Yellow River,Considering the Hydrological Change

LI Jianfeng,ZHANG Qiang,CHEN Xiaohong,JIANG Tao(Department of Water Resources and Environment,Sun Yat-Sen University;Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute,Sun Yat-Sen University,Guangzhou 510275,China)  
Climate changes and human activities can lead to hydrological change.Distributions of the samples before and after hydrological change are significantly different.It means the local hydrological condition has changed,which breaks the ecological balance.We use moving rank sum test(Mann-Whitney U Test) to analyse hydrological changes and their causes.Then,L-moment is used to evaluate the parameters of generalized extreme value(GEV) distribution of the monthly flow series before hydrological change,and to calculate the maximum probability density flow,as the ecological instream flow.We use this method to calculate ecological instream flows of 7 hydrometric stations in the Yellow River Basin.The result shows that ecological calculating method which considers the hydrological change is practicable.
【Fund】: 国家自然科学基金项目(41071020);; 中山大学理工科青年教师重点培育计划项目(2009-37000-1132381);; 广东省自然科学基金项目(4203384);; 国家自然科学基金重点资助项目(50839005)~~
【CateGory Index】: P333
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