Separating the impacts of climate variability,land-use change and large reservoir operations on streamflow in the Yangtze River basin,China,using a hydrological modeling approach

作     者：Ning Nie Wanchang Zhang Min Liu Hao Chen Dengzhong Zhao 

作者机构：Key Laboratory of Geographic Information Science of the Ministry of EducationSchool of Geographic SciencesEast China Normal UniversityShanghaiPeople’s Republic of China Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China Institute of Eco-Chongming(IEC)ShanghaiPeople’s Republic of China Institute of Surface-Earth System ScienceSchool of Earth System ScienceTianjin UniversityTianjinPeople’s Republic of China Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai RimTianjin UniversityTianjinPeople’s Republic of China Changjiang River Scientific Research InstituteWuhanPeople’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2期

页      面：231-249页

核心收录：

学科分类：08[工学] 081501[工学-水文学及水资源] 0708[理学-地球物理学] 0815[工学-水利工程] 0835[工学-软件工程] 0704[理学-天文学] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Key R&D Program of China[grant numbers 2017YFE0100700,2016YFA0602302 and 2017YFC1503001] the National Natural Science Foundation of China[grant numbers 41901228,41761144062 and 41730646]. 

主　　题：Climate variability land-use change reservoirs streamflow Yangtze River Basin 

摘      要：Separating the individual effects of climate variability and human activities on streamflow is more important than just knowing their combined effects.In this paper,using a scenario-based hydrological simulation approach,the streamflow changes caused by climate variability and two different types of human activities(i.***.land-use change and large reservoirs operations)as well as the contribution rates of these three factors over 272 sub-basins in the Yangtze river basin were quantified and compared among 5 different periods(i.e.1988–1992(P1),1993–1997(P2),1998–2002(P3),2003–2007(P4)and 2008–2012(P5)).Results demonstrate that,at the annual scale,climate variability played a leading role in the change in outflow of most sub-basins.With regard to the seasonal variations in discharge at Datong station,climate factors played a predominant role during P1-P2 and P2-P3.Since the Three Gorges Reservoir began operating in 2003,the discharge was enhanced by reservoirs in January-May and reduced by reservoirs in JulyDecember.Reservoir and climate factors codetermined seasonal streamflow change during P3-P4 and P4-P5.Land-use change made the smallest contribution to seasonal discharge fluctuations.This study can support decision-making in regional water resources planning and management.