Impact of climate change and human activities on the spatiotemporal dynamics of surface water area in Gansu Province, ChinaOACSTPCD
Understanding the dynamics of surface water area and their drivers is crucial for human survival and ecosystem stability in inland arid and semi-arid areas.This study took Gansu Province,China,a typical area with complex terrain and variable climate,as the research subject.Based on Google Earth Engine,we used Landsat data and the Open-surface Water Detection Method with Enhanced Impurity Control method to monitor the spatiotemporal dynamics of surface water area in Gansu Province from 1985 to 2022,and quantitatively analyzed the main causes of regional differences in surface water area.The findings revealed that surface water area in Gansu Province expanded by 406.88 km2 from 1985 to 2022.Seasonal surface water area exhibited significant fluctuations,while permanent surface water area showed a steady increase.Notably,terrestrial water storage exhibited a trend of first decreasing and then increasing,correlated with the dynamics of surface water area.Climate change and human activities jointly affected surface hydrological processes,with the impact of climate change being slightly higher than that of human activities.Spatially,climate change affected the''source''of surface water to a greater extent,while human activities tended to affect the''destination''of surface water.Challenges of surface water resources faced by inland arid and semi-arid areas like Gansu Province are multifaceted.Therefore,we summarized the surface hydrology patterns typical in inland arid and semi-arid areas and tailored surface water''supply-demand''balance strategies.The study not only sheds light on the dynamics of surface water area in Gansu Province,but also offers valuable insights for ecological protection and surface water resource management in inland arid and semi-arid areas facing water scarcity.
LU Haitian;ZHAO Ruifeng;ZHAO Liu;LIU Jiaxin;LYU Binyang;YANG Xinyue;
College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,ChinaCollege of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China Key Laboratory of Resource Environment and Sustainable Development of Oasis,Gansu Province,Lanzhou 730070,ChinaSchool of Geography,Planning and Spatial Sciences,University of Tasmania,Hobart TAS 7005,AustraliaSchool of Chinese Language and Literature,Xi''an International Studies University,Xi''an 710128,ChinaDepartment of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen 518055,ChinaSchool of Design and Built Environment,Curtin University,Perth 6102,Australia
水利科学
surface water areaterrestrial water storageOpen-surface Water Detection Method with Enhanced Impurity Control methodGoogle Earth Engineclimate changehuman activitiesinland arid and semi-arid areas
《Journal of Arid Land》 2024 (006)
P.798-815 / 18
This research was supported by the Third Xinjiang Scientific Expedition Program(2021xjkk010102);the National Natural Science Foundation of China(41261047,41761043);the Science and Technology Plan of Gansu Province,China(20YF3FA042);the Youth Teacher Scientific Capability Promoting Project of Northwest Normal University,Gansu Province,China(NWNU-LKQN-17-7).We thank all the people related to this study.
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