Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China
It is anticipated that global warming will modify precipitation and evapotranspiration patterns, consequently affecting water availability. Changes in water availability pose challenges to freshwater supply, food security, and ecosystem sustainability. However, the variations and driving mechanisms...
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MDPI AG
2024-11-01
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| author | Xiaoyu Han Yaning Chen Gonghuan Fang Zhi Li Yupeng Li Yanfeng Di |
| author_facet | Xiaoyu Han Yaning Chen Gonghuan Fang Zhi Li Yupeng Li Yanfeng Di |
| author_sort | Xiaoyu Han |
| collection | DOAJ |
| description | It is anticipated that global warming will modify precipitation and evapotranspiration patterns, consequently affecting water availability. Changes in water availability pose challenges to freshwater supply, food security, and ecosystem sustainability. However, the variations and driving mechanisms of water availability in the arid and semiarid regions of Northern China remain unclear. This study evaluates the accuracy of three evapotranspiration products and analyzes the changes in water availability in the arid and semiarid regions of Northern China over the past 39 years (1982–2020) along with their driving factors. The results indicate that during this period, precipitation increased at a rate of 7.5 mm/decade, while evapotranspiration rose at a higher rate of 13 mm/decade, resulting in a decline in water availability of 5.5 mm/decade. Spatially, approximately 30.17% of the area exhibited a significant downward trend in water availability, while 65.65% remained relatively stable. Evapotranspiration is the dominant factor leading to the decrease in water availability, with a contribution rate of 63.41%. The increase in evapotranspiration was primarily driven by temperature (32.53% contribution) and the saturation vapor pressure deficit (24.72% contribution). The decline in water availability may further exacerbate drought risks in arid and semiarid regions. The research results can provide a scientific basis for developing water resource management strategies and ecological restoration strategies under environmental change. |
| format | Article |
| id | doaj-art-f856b6fa14e7405f9a910a57c05a66d1 |
| institution | Kabale University |
| issn | 2072-4292 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-f856b6fa14e7405f9a910a57c05a66d12024-11-26T18:20:24ZengMDPI AGRemote Sensing2072-42922024-11-011622431810.3390/rs16224318Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern ChinaXiaoyu Han0Yaning Chen1Gonghuan Fang2Zhi Li3Yupeng Li4Yanfeng Di5State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaIt is anticipated that global warming will modify precipitation and evapotranspiration patterns, consequently affecting water availability. Changes in water availability pose challenges to freshwater supply, food security, and ecosystem sustainability. However, the variations and driving mechanisms of water availability in the arid and semiarid regions of Northern China remain unclear. This study evaluates the accuracy of three evapotranspiration products and analyzes the changes in water availability in the arid and semiarid regions of Northern China over the past 39 years (1982–2020) along with their driving factors. The results indicate that during this period, precipitation increased at a rate of 7.5 mm/decade, while evapotranspiration rose at a higher rate of 13 mm/decade, resulting in a decline in water availability of 5.5 mm/decade. Spatially, approximately 30.17% of the area exhibited a significant downward trend in water availability, while 65.65% remained relatively stable. Evapotranspiration is the dominant factor leading to the decrease in water availability, with a contribution rate of 63.41%. The increase in evapotranspiration was primarily driven by temperature (32.53% contribution) and the saturation vapor pressure deficit (24.72% contribution). The decline in water availability may further exacerbate drought risks in arid and semiarid regions. The research results can provide a scientific basis for developing water resource management strategies and ecological restoration strategies under environmental change.https://www.mdpi.com/2072-4292/16/22/4318water availabilityevapotranspirationattribution analysisglobal climate changevegetation dynamics |
| spellingShingle | Xiaoyu Han Yaning Chen Gonghuan Fang Zhi Li Yupeng Li Yanfeng Di Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China Remote Sensing water availability evapotranspiration attribution analysis global climate change vegetation dynamics |
| title | Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China |
| title_full | Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China |
| title_fullStr | Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China |
| title_full_unstemmed | Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China |
| title_short | Spatiotemporal Variations and Driving Factors of Water Availability in the Arid and Semiarid Regions of Northern China |
| title_sort | spatiotemporal variations and driving factors of water availability in the arid and semiarid regions of northern china |
| topic | water availability evapotranspiration attribution analysis global climate change vegetation dynamics |
| url | https://www.mdpi.com/2072-4292/16/22/4318 |
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