Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis
Among the various natural disasters encountered by cities, rainstorm waterlogging has become a serious disaster, affecting the sustainable development of cities. Taking Guangzhou as the research object, based on disaster system theory and risk triangle theory, the evaluation framework “risk of hazar...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/18/2899 |
| _version_ | 1797481237008351232 |
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| author | Shuai Xie Wan Liu Zhe Yuan Hongyun Zhang Hang Lin Yongqiang Wang |
| author_facet | Shuai Xie Wan Liu Zhe Yuan Hongyun Zhang Hang Lin Yongqiang Wang |
| author_sort | Shuai Xie |
| collection | DOAJ |
| description | Among the various natural disasters encountered by cities, rainstorm waterlogging has become a serious disaster, affecting the sustainable development of cities. Taking Guangzhou as the research object, based on disaster system theory and risk triangle theory, the evaluation framework “risk of hazard causing factors—sensitivity of disaster environment—vulnerability of hazard bearing body” was selected to construct the waterlogging risk assessment model of Guangzhou. The weighted comprehensive evaluation method (AHP) was used to determine the index weight, and the rainfall runoff inundation range under different rainstorm scenarios was deduced through a Soil Conservation Service (SCS) runoff generation model and GIS local equal volume passive inundation simulation. The results show that when the precipitation in 2 h is less than 100 mm, the inundation range increases by 3.4 km<sup>2</sup> for every 10 mm increase in precipitation; When the precipitation in 2 h is greater than 100 mm, the inundation range will increase by 18 km<sup>2</sup> for every 10 mm increase in precipitation. The total area of medium and high flood risk in Guangzhou is 441.3 km<sup>2</sup>, mainly concentrated in Yuexiu District, Liwan District, Haizhu District and Tianhe District. |
| first_indexed | 2024-03-09T22:11:37Z |
| format | Article |
| id | doaj.art-af670f7977d64e95b15328c98d045870 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T22:11:37Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-af670f7977d64e95b15328c98d0458702023-11-23T19:31:55ZengMDPI AGWater2073-44412022-09-011418289910.3390/w14182899Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario AnalysisShuai Xie0Wan Liu1Zhe Yuan2Hongyun Zhang3Hang Lin4Yongqiang Wang5Changjiang River Scientifific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, ChinaChangjiang River Scientifific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, ChinaChangjiang River Scientifific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, ChinaAnhui Provincial Traffic Survey and Design Institute Co., Ltd., Hefei 230011, ChinaChangjiang River Scientifific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, ChinaChangjiang River Scientifific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, ChinaAmong the various natural disasters encountered by cities, rainstorm waterlogging has become a serious disaster, affecting the sustainable development of cities. Taking Guangzhou as the research object, based on disaster system theory and risk triangle theory, the evaluation framework “risk of hazard causing factors—sensitivity of disaster environment—vulnerability of hazard bearing body” was selected to construct the waterlogging risk assessment model of Guangzhou. The weighted comprehensive evaluation method (AHP) was used to determine the index weight, and the rainfall runoff inundation range under different rainstorm scenarios was deduced through a Soil Conservation Service (SCS) runoff generation model and GIS local equal volume passive inundation simulation. The results show that when the precipitation in 2 h is less than 100 mm, the inundation range increases by 3.4 km<sup>2</sup> for every 10 mm increase in precipitation; When the precipitation in 2 h is greater than 100 mm, the inundation range will increase by 18 km<sup>2</sup> for every 10 mm increase in precipitation. The total area of medium and high flood risk in Guangzhou is 441.3 km<sup>2</sup>, mainly concentrated in Yuexiu District, Liwan District, Haizhu District and Tianhe District.https://www.mdpi.com/2073-4441/14/18/2899waterlogging risk assessmentSCS runoff generation modelvolumetric methodGuangzhou |
| spellingShingle | Shuai Xie Wan Liu Zhe Yuan Hongyun Zhang Hang Lin Yongqiang Wang Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis Water waterlogging risk assessment SCS runoff generation model volumetric method Guangzhou |
| title | Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis |
| title_full | Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis |
| title_fullStr | Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis |
| title_full_unstemmed | Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis |
| title_short | Integrated Risk Assessment of Waterlogging in Guangzhou Based on Runoff Modeling, AHP, GIS and Scenario Analysis |
| title_sort | integrated risk assessment of waterlogging in guangzhou based on runoff modeling ahp gis and scenario analysis |
| topic | waterlogging risk assessment SCS runoff generation model volumetric method Guangzhou |
| url | https://www.mdpi.com/2073-4441/14/18/2899 |
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