Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model
Study region: The Yangtze River basin, China. Study focus: In this study, a large-scale coupled model of hydrological and hydrodynamic processes was developed via the Distributed Time Variant Gain Model and the hydrodynamics-operation coupled model. Two scenarios including operated by the Three Gorg...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581822000520 |
| _version_ | 1818288633886539776 |
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| author | Linhan Yang Sidong Zeng Jun Xia Yueling Wang Renyong Huang Minghao Chen |
| author_facet | Linhan Yang Sidong Zeng Jun Xia Yueling Wang Renyong Huang Minghao Chen |
| author_sort | Linhan Yang |
| collection | DOAJ |
| description | Study region: The Yangtze River basin, China. Study focus: In this study, a large-scale coupled model of hydrological and hydrodynamic processes was developed via the Distributed Time Variant Gain Model and the hydrodynamics-operation coupled model. Two scenarios including operated by the Three Gorges Dam (TGD) and natural condition hypothesis without the reservoir construction, were analyzed based on the coupled model to investigate the effects of TGD operation on the streamflow from 1970 to 2018. New hydrological insights: Results exhibited that the annual average relative deviation of flow operated by the TGD was approximately 24% compared with the natural state at Yichang, while the value of Chenglingji, Hankou, Hukou and Datong were 8.5~12.8%. During water supply period, the TGD operation increase the streamflow by 33% at Yichang, and the streamflow in downstream can gain about 6–17%. For impounding process, except Hukou, the others showed a decreasing trend, and the reduction ranged from about 7–20%. For flood season, the dam operation mainly intercepts high flood peaks while the average streamflow changes a little. The high flood peaks at Yichang can be reduced by 20%, and the changes of high flood peaks in downstream reduce to no more than 10% due to the influence of interval inflow. The deviations during drawdown period are almost below 10%. |
| first_indexed | 2024-12-13T01:59:29Z |
| format | Article |
| id | doaj.art-d5fab421255a4eb2afe55e56ec4637b5 |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-12-13T01:59:29Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-d5fab421255a4eb2afe55e56ec4637b52022-12-22T00:03:18ZengElsevierJournal of Hydrology: Regional Studies2214-58182022-04-0140101039Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled modelLinhan Yang0Sidong Zeng1Jun Xia2Yueling Wang3Renyong Huang4Minghao Chen5Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China; Corresponding author at: Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, 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, Chinese Academy of Sciences, Beijing 100101 ChinaKey Laboratory of Water Cycle and Related Land Surface Processes, Chinese Academy of Sciences, Beijing 100101 ChinaYangtze River Scientific Research Institute, Wuhan 430010, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, ChinaStudy region: The Yangtze River basin, China. Study focus: In this study, a large-scale coupled model of hydrological and hydrodynamic processes was developed via the Distributed Time Variant Gain Model and the hydrodynamics-operation coupled model. Two scenarios including operated by the Three Gorges Dam (TGD) and natural condition hypothesis without the reservoir construction, were analyzed based on the coupled model to investigate the effects of TGD operation on the streamflow from 1970 to 2018. New hydrological insights: Results exhibited that the annual average relative deviation of flow operated by the TGD was approximately 24% compared with the natural state at Yichang, while the value of Chenglingji, Hankou, Hukou and Datong were 8.5~12.8%. During water supply period, the TGD operation increase the streamflow by 33% at Yichang, and the streamflow in downstream can gain about 6–17%. For impounding process, except Hukou, the others showed a decreasing trend, and the reduction ranged from about 7–20%. For flood season, the dam operation mainly intercepts high flood peaks while the average streamflow changes a little. The high flood peaks at Yichang can be reduced by 20%, and the changes of high flood peaks in downstream reduce to no more than 10% due to the influence of interval inflow. The deviations during drawdown period are almost below 10%.http://www.sciencedirect.com/science/article/pii/S2214581822000520Coupling of hydrologic and hydrodynamic processesThree Gorges Reservoir areaMid-lower reach of Yangtze RiverFlow regime |
| spellingShingle | Linhan Yang Sidong Zeng Jun Xia Yueling Wang Renyong Huang Minghao Chen Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model Journal of Hydrology: Regional Studies Coupling of hydrologic and hydrodynamic processes Three Gorges Reservoir area Mid-lower reach of Yangtze River Flow regime |
| title | Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model |
| title_full | Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model |
| title_fullStr | Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model |
| title_full_unstemmed | Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model |
| title_short | Effects of the Three Gorges Dam on the downstream streamflow based on a large-scale hydrological and hydrodynamics coupled model |
| title_sort | effects of the three gorges dam on the downstream streamflow based on a large scale hydrological and hydrodynamics coupled model |
| topic | Coupling of hydrologic and hydrodynamic processes Three Gorges Reservoir area Mid-lower reach of Yangtze River Flow regime |
| url | http://www.sciencedirect.com/science/article/pii/S2214581822000520 |
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