Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China
Study region: Zhaotong City, located in the Jinsha River Watershed in southwest China, features a developed river network, mountainous terrain, and significant elevation changes. The region experiences a low-latitude plateau monsoon climate, with rainfall concentrated in the wet season. Study focus:...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-06-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581825001892 |
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| author | Jinjun Zhou Chunxin Sun Jiahong Liu Ruirui Sun Songyun Jin Chenrui Qin Hao Wang |
| author_facet | Jinjun Zhou Chunxin Sun Jiahong Liu Ruirui Sun Songyun Jin Chenrui Qin Hao Wang |
| author_sort | Jinjun Zhou |
| collection | DOAJ |
| description | Study region: Zhaotong City, located in the Jinsha River Watershed in southwest China, features a developed river network, mountainous terrain, and significant elevation changes. The region experiences a low-latitude plateau monsoon climate, with rainfall concentrated in the wet season. Study focus: This study uses a 2D hydrodynamic model and a dam-break flood model to assess flood risks of parallel reservoirs and quantify direct economic losses under different scenarios. It also explores the causes of risk and loss variations across scenarios. New hydrological insights for the region: Differences in dam site locations and downstream topography result in significant variations in inundation areas, with extreme cases differing by nearly twofold. Dam-break flood losses depend on inundation extent, water depth, and land value. Variations in high-value land inundation, such as residential, commercial, and industrial areas, are the main reason for differences in direct economic losses. The fatality area of a dam-break flood from parallel reservoirs is smaller than the sum of individual reservoirs due to river confluence effects, delaying the flood's arrival at the city center. Overall, parallel reservoir dam-break risks are influenced by multiple factors, requiring case-specific analysis rather than simple risk summation. |
| format | Article |
| id | doaj-art-fd1b97dc0bea4c9f9c462136e1c3c53d |
| institution | OA Journals |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-fd1b97dc0bea4c9f9c462136e1c3c53d2025-08-20T02:25:26ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-06-015910236410.1016/j.ejrh.2025.102364Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in ChinaJinjun Zhou0Chunxin Sun1Jiahong Liu2Ruirui Sun3Songyun Jin4Chenrui Qin5Hao Wang6College of Architecture and Civil Engineering, Beijing University Of Technology, Beijing 100124, ChinaCollege of Architecture and Civil Engineering, Beijing University Of Technology, Beijing 100124, ChinaChina Institute of Water Resources and Hydropower Research State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing 100038, ChinaCollege of Architecture and Civil Engineering, Beijing University Of Technology, Beijing 100124, ChinaCollege of Architecture and Civil Engineering, Beijing University Of Technology, Beijing 100124, ChinaCollege of Architecture and Civil Engineering, Beijing University Of Technology, Beijing 100124, ChinaCollege of Architecture and Civil Engineering, Beijing University Of Technology, Beijing 100124, China; Correspondence to: Beijing University of Technology, Faculty of Architecture, Civil and Transportation Engineering, Beijing, People's Republic of China.Study region: Zhaotong City, located in the Jinsha River Watershed in southwest China, features a developed river network, mountainous terrain, and significant elevation changes. The region experiences a low-latitude plateau monsoon climate, with rainfall concentrated in the wet season. Study focus: This study uses a 2D hydrodynamic model and a dam-break flood model to assess flood risks of parallel reservoirs and quantify direct economic losses under different scenarios. It also explores the causes of risk and loss variations across scenarios. New hydrological insights for the region: Differences in dam site locations and downstream topography result in significant variations in inundation areas, with extreme cases differing by nearly twofold. Dam-break flood losses depend on inundation extent, water depth, and land value. Variations in high-value land inundation, such as residential, commercial, and industrial areas, are the main reason for differences in direct economic losses. The fatality area of a dam-break flood from parallel reservoirs is smaller than the sum of individual reservoirs due to river confluence effects, delaying the flood's arrival at the city center. Overall, parallel reservoir dam-break risks are influenced by multiple factors, requiring case-specific analysis rather than simple risk summation.http://www.sciencedirect.com/science/article/pii/S2214581825001892Dam-break flood riskParallel reservoir systemsDam-break flood lossesNumerical modeling |
| spellingShingle | Jinjun Zhou Chunxin Sun Jiahong Liu Ruirui Sun Songyun Jin Chenrui Qin Hao Wang Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China Journal of Hydrology: Regional Studies Dam-break flood risk Parallel reservoir systems Dam-break flood losses Numerical modeling |
| title | Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China |
| title_full | Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China |
| title_fullStr | Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China |
| title_full_unstemmed | Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China |
| title_short | Risk spatial distribution and economic loss assessment for parallel reservoir group dam-break floods: A case study of southwest river basin in China |
| title_sort | risk spatial distribution and economic loss assessment for parallel reservoir group dam break floods a case study of southwest river basin in china |
| topic | Dam-break flood risk Parallel reservoir systems Dam-break flood losses Numerical modeling |
| url | http://www.sciencedirect.com/science/article/pii/S2214581825001892 |
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