Response of flood events to extreme precipitation: two case studies in Taihu Basin, China
Flood events are typically triggered by extreme precipitation in rain-dominant basins. In this study, to better understand the genetic mechanisms and characteristics of floods, copula functions are used to analyze the response of flood events to extreme precipitation. The coincidence probabilities o...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-06-01
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| Series: | Water Supply |
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| Online Access: | http://ws.iwaponline.com/content/21/4/1629 |
| _version_ | 1818749486464237568 |
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| author | Feiqing Jiang Zengchuan Dong Yun Luo Moyang Liu Tao Zhou Xinkui Wang Zhenye Zhu |
| author_facet | Feiqing Jiang Zengchuan Dong Yun Luo Moyang Liu Tao Zhou Xinkui Wang Zhenye Zhu |
| author_sort | Feiqing Jiang |
| collection | DOAJ |
| description | Flood events are typically triggered by extreme precipitation in rain-dominant basins. In this study, to better understand the genetic mechanisms and characteristics of floods, copula functions are used to analyze the response of flood events to extreme precipitation. The coincidence probabilities of the typical extreme flood and precipitation events are calculated; different return periods of their arbitrary combinations are calculated, whereas the dangerous domains for flood control under different return periods are identified; furthermore, flood risk analysis under different extreme precipitation scenarios is performed via their conditional exceedance probabilities. The Xitiaoxi catchment (XC) and Dongtiaoxi catchment (DC) in the Zhexi Region of the Taihu Basin are selected as the study area. The results show that in four scenarios with precipitation frequencies of 80%, 90%, 93.33%, and 95%, the probabilities of the dangerous flood are 9.72%, 10.57%, 10.86%, and 11.01% in the XC, respectively, and 5.91%, 6.31%, 6.44%, and 6.51% in the DC, respectively. This study provides a practical basis and guidance for the computation of rainstorm designs, management of flood control safety, and water resource scheduling in the Taihu Basin. HIGHLIGHTS
This study focused on the flood risk in the main water source of Taihu Lake, i.e., the Zhexi Region, which had a direct and significant impact on the floods in the Taihu Basin.;
Extreme hydrological and meteorological events were considered as the objects of this study. Their joint probability distribution and combined effects were directly related to the degree of flood risk.; |
| first_indexed | 2024-12-18T04:04:33Z |
| format | Article |
| id | doaj.art-c18c5d6f62694382b644960334de176c |
| institution | Directory Open Access Journal |
| issn | 1606-9749 1607-0798 |
| language | English |
| last_indexed | 2024-12-18T04:04:33Z |
| publishDate | 2021-06-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Supply |
| spelling | doaj.art-c18c5d6f62694382b644960334de176c2022-12-21T21:21:36ZengIWA PublishingWater Supply1606-97491607-07982021-06-012141629164810.2166/ws.2021.001001Response of flood events to extreme precipitation: two case studies in Taihu Basin, ChinaFeiqing Jiang0Zengchuan Dong1Yun Luo2Moyang Liu3Tao Zhou4Xinkui Wang5Zhenye Zhu6 Department of Hydrology and Water Resources, Hohai University, No. 1 of Xikang Road, Nanjing, Jiangsu, China Department of Hydrology and Water Resources, Hohai University, No. 1 of Xikang Road, Nanjing, Jiangsu, China Department of Hydrology and Water Resources, Hohai University, No. 1 of Xikang Road, Nanjing, Jiangsu, China Hanjiang River Bureau of Hydrology and Water Resources Survey, Bureau of Hydrology, Changjiang Water Resources Commission, Xiangyang, Hubei, China Changjiang River Scientific Research Institute, No. 23 of Huangpu Road, Wuhan, Hubei, China Department of Hydrology and Water Resources, Hohai University, No. 1 of Xikang Road, Nanjing, Jiangsu, China West Lake Construction Investment Group, No. 333 Lihuang Street, Hangzhou, Zhejiang, China Flood events are typically triggered by extreme precipitation in rain-dominant basins. In this study, to better understand the genetic mechanisms and characteristics of floods, copula functions are used to analyze the response of flood events to extreme precipitation. The coincidence probabilities of the typical extreme flood and precipitation events are calculated; different return periods of their arbitrary combinations are calculated, whereas the dangerous domains for flood control under different return periods are identified; furthermore, flood risk analysis under different extreme precipitation scenarios is performed via their conditional exceedance probabilities. The Xitiaoxi catchment (XC) and Dongtiaoxi catchment (DC) in the Zhexi Region of the Taihu Basin are selected as the study area. The results show that in four scenarios with precipitation frequencies of 80%, 90%, 93.33%, and 95%, the probabilities of the dangerous flood are 9.72%, 10.57%, 10.86%, and 11.01% in the XC, respectively, and 5.91%, 6.31%, 6.44%, and 6.51% in the DC, respectively. This study provides a practical basis and guidance for the computation of rainstorm designs, management of flood control safety, and water resource scheduling in the Taihu Basin. HIGHLIGHTS This study focused on the flood risk in the main water source of Taihu Lake, i.e., the Zhexi Region, which had a direct and significant impact on the floods in the Taihu Basin.; Extreme hydrological and meteorological events were considered as the objects of this study. Their joint probability distribution and combined effects were directly related to the degree of flood risk.;http://ws.iwaponline.com/content/21/4/1629bivariate frequencycopulaextreme precipitationflood risk analysisreturn periodstaihu basin |
| spellingShingle | Feiqing Jiang Zengchuan Dong Yun Luo Moyang Liu Tao Zhou Xinkui Wang Zhenye Zhu Response of flood events to extreme precipitation: two case studies in Taihu Basin, China Water Supply bivariate frequency copula extreme precipitation flood risk analysis return periods taihu basin |
| title | Response of flood events to extreme precipitation: two case studies in Taihu Basin, China |
| title_full | Response of flood events to extreme precipitation: two case studies in Taihu Basin, China |
| title_fullStr | Response of flood events to extreme precipitation: two case studies in Taihu Basin, China |
| title_full_unstemmed | Response of flood events to extreme precipitation: two case studies in Taihu Basin, China |
| title_short | Response of flood events to extreme precipitation: two case studies in Taihu Basin, China |
| title_sort | response of flood events to extreme precipitation two case studies in taihu basin china |
| topic | bivariate frequency copula extreme precipitation flood risk analysis return periods taihu basin |
| url | http://ws.iwaponline.com/content/21/4/1629 |
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