首页|Effects of precipitation on vegetation and surface water in the Yellow River Basin during 2000-2021
Effects of precipitation on vegetation and surface water in the Yellow River Basin during 2000-2021
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The Yellow River Basin(YRB)is a vital ecological zone in China owing to its sensi-tive and fragile environment.Under the long-term influence of climate changes and artificial factors,the relationship between precipitation,vegetation,and surface water in the YRB has changed drastically,ultimately affecting the water resources and environmental management.Therefore,we applied multivariate statistical analysis to investigate the precipitation,nor-malized difference vegetation index(NDVI),and surface water changes in the YRB from 2000 to 2021.Furthermore,we attempted to clarify the ecological effects of precipitation by ex-plaining the relationship between precipitation and vegetation in terms of the time-lag rela-tionship using the Integrated Multi-satellite Retrievals for Global Precipitation Measurement algorithm,Moderate Resolution Imaging Spectroradiometer,and hydrological databases.Precipitation,vegetation,and area of surface water in the YRB showed increasing trends from 2000-2021(e.g.,7.215 mm/yr,0.004 NDVI/yr,and 0.932 km2/yr,respectively).The water level in the upper reaches of the YRB showed a downward trend,whereas that in the middle and lower reaches exhibited an upward trend.Changes in precipitation had a positive effect on vegetation and surface water in the YRB,with correlation coefficients of 0.63 and 0.51,respectively.The responses of NDVI and surface water elevation to precipitation were heterogeneous and delayed,with the majority showing a lag time of approximately ≤16 days.Moreover,the lag times of Longyangxia Lake and Ngoring-Co Lake were 0 and 8 days,re-spectively.We showed that precipitation variability can effectively explain vegetation im-provement and increases in surface water elevation,while providing a proven scenario for pre-dicting the surface water and vegetation productivity under the influence of climate change.
precipitationvegetation coversurface waterspatial and temporal variationYellow River Basin
SHI Xiaorui、YANG Peng、XIA Jun、ZHANG Yongyong、HUANG Heqing、ZHU Yanchao
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Hubei Key Laboratory of Regional Ecology and Environmental Change,School of Geography and Infor-mation Engineering,China University of Geosciences,Wuhan 430074,China
National Engineering Research Center for Geographic Information System,China University of Geosciences,Wuhan 430074,China
State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China
Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China
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国家重点研发计划国家自然科学基金Joint Open Research Fund Program of State Key Laboratory of Hydroscience and Engineering and Tsinghua
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