Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought
Study region: Poyang Lake, China's largest freshwater lake Study focus: The water level variations of Poyang Lake and the combined effects of the upstream rivers and the Yangtze River during extreme drought events are not yet fully understood. In this study, the temporal and spatial variations...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581824005147 |
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| author | Hexiang Chen Guangqiu Jin Hongwu Tang Jinran Wu You-Gan Wang Zhongtian Zhang Yanqing Deng Siyi Zhang |
| author_facet | Hexiang Chen Guangqiu Jin Hongwu Tang Jinran Wu You-Gan Wang Zhongtian Zhang Yanqing Deng Siyi Zhang |
| author_sort | Hexiang Chen |
| collection | DOAJ |
| description | Study region: Poyang Lake, China's largest freshwater lake Study focus: The water level variations of Poyang Lake and the combined effects of the upstream rivers and the Yangtze River during extreme drought events are not yet fully understood. In this study, the temporal and spatial variations of Poyang Lake's water level and the river-lake interactions were investigated using mathematical statistics and regression models. New hydrological insights for the region: Extreme drought occurrences in Poyang Lake have increased over fourfold compared to previous periods since the 21st century. The 2022 extreme drought represents the most intense, severe, and prolonged drought event in Poyang Lake since 1956. It is characterized by unprecedented low water levels during both the flood and dry seasons. The study further emphasizes the changes in river-lake interactions during the extreme drought, indicating a reduced blocking effect of the Yangtze River on Poyang Lake during the flood season and a diminished emptying effect during the retreating and dry seasons. Compared to multi-year averages, reduced upstream discharge, Yangtze River flow, and the Three Gorges Dam operations during this drought contributed 23.68 %, 38.10 %, and 38.22 % respectively to the water level decline. During the drought period, both natural precipitation-driven flow increase in upstream rivers and water released from the dam provided short-term relief, though insufficient to fully mitigate the drought conditions. |
| format | Article |
| id | doaj-art-28edfb69353b467c8ce6ea81a71a3b81 |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-28edfb69353b467c8ce6ea81a71a3b812025-01-22T05:42:17ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102165Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme droughtHexiang Chen0Guangqiu Jin1Hongwu Tang2Jinran Wu3You-Gan Wang4Zhongtian Zhang5Yanqing Deng6Siyi Zhang7The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, ChinaThe National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China; Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources, Hohai University, Nanjing, China; Corresponding author at: The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, ChinaThe National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China; Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources, Hohai University, Nanjing, ChinaInstitute for Positive Psychology and Education, Australian Catholic University, Banyo, QLD 4014, AustraliaSchool of Mathematics and Physics, The University of Queensland, Brisbane, QLD 4067, AustraliaThe National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; Jiangsu Taihu Water Conservancy Planning and Design Institute Co., Ld., Suzhou 215006, ChinaJiangxi Hydrological Monitoring Center, Nanchang 330008, China; Jiangxi Provincal Key Laboratory of Ecohydrological Monitoring Research in Poyang Lake Basin, Nanchang, China; Hohai University, Nanjing 210098, ChinaThe National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, ChinaStudy region: Poyang Lake, China's largest freshwater lake Study focus: The water level variations of Poyang Lake and the combined effects of the upstream rivers and the Yangtze River during extreme drought events are not yet fully understood. In this study, the temporal and spatial variations of Poyang Lake's water level and the river-lake interactions were investigated using mathematical statistics and regression models. New hydrological insights for the region: Extreme drought occurrences in Poyang Lake have increased over fourfold compared to previous periods since the 21st century. The 2022 extreme drought represents the most intense, severe, and prolonged drought event in Poyang Lake since 1956. It is characterized by unprecedented low water levels during both the flood and dry seasons. The study further emphasizes the changes in river-lake interactions during the extreme drought, indicating a reduced blocking effect of the Yangtze River on Poyang Lake during the flood season and a diminished emptying effect during the retreating and dry seasons. Compared to multi-year averages, reduced upstream discharge, Yangtze River flow, and the Three Gorges Dam operations during this drought contributed 23.68 %, 38.10 %, and 38.22 % respectively to the water level decline. During the drought period, both natural precipitation-driven flow increase in upstream rivers and water released from the dam provided short-term relief, though insufficient to fully mitigate the drought conditions.http://www.sciencedirect.com/science/article/pii/S2214581824005147Extreme droughtPoyang LakeThree Gorges DamRiver-lake interactionWater level |
| spellingShingle | Hexiang Chen Guangqiu Jin Hongwu Tang Jinran Wu You-Gan Wang Zhongtian Zhang Yanqing Deng Siyi Zhang Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought Journal of Hydrology: Regional Studies Extreme drought Poyang Lake Three Gorges Dam River-lake interaction Water level |
| title | Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought |
| title_full | Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought |
| title_fullStr | Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought |
| title_full_unstemmed | Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought |
| title_short | Spatiotemporal variations of water levels and river-lake interaction in the Poyang Lake basin under the extreme drought |
| title_sort | spatiotemporal variations of water levels and river lake interaction in the poyang lake basin under the extreme drought |
| topic | Extreme drought Poyang Lake Three Gorges Dam River-lake interaction Water level |
| url | http://www.sciencedirect.com/science/article/pii/S2214581824005147 |
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