Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China
AbstractHydrodynamics and socio-economic impacts of compound floods as the result of co-occurring pluvial and fluvial floods, have not been well studied, which challenges conventional urban flood risk management that treats different types of floods separately. This study generates a high-resolution...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | Geomatics, Natural Hazards & Risk |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19475705.2023.2218012 |
| _version_ | 1797389204967129088 |
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| author | Lilai Xu Xue Yang Shenghui Cui Jianxiong Tang Shengping Ding Xiaomeng Zhang |
| author_facet | Lilai Xu Xue Yang Shenghui Cui Jianxiong Tang Shengping Ding Xiaomeng Zhang |
| author_sort | Lilai Xu |
| collection | DOAJ |
| description | AbstractHydrodynamics and socio-economic impacts of compound floods as the result of co-occurring pluvial and fluvial floods, have not been well studied, which challenges conventional urban flood risk management that treats different types of floods separately. This study generates a high-resolution land surface digital surface model based on images from unmanned aerial vehicles, and incorporates it into a combined flooding model that integrates the 1D river hydrodynamic model, 1D urban drainage hydrodynamic model and 2D overland flow model, in order to simulate the inundation characteristics of extreme floods when local pluvial floods coincide with upstream fluvial floods, and in a further step to quantify the direct economic losses on urban physical systems. As demonstrated by an empirical study of Longyan, China, the combination of pluvial and fluvial floods leads to substantial exacerbation in inundation extent and depth. Consequently, the joining of pluvial and fluvial floods greatly amplifies economic losses to urban physical systems, indicating that ignoring co-occurrence of different types of floods will potentially lead to underestimation of flood risk and insufficient adaptation. Our study emphasizes the need to account for the co-occurrence of multiple types of floods in flood risk assessment and management, to avoid the shortcomings of fragmented responses. |
| first_indexed | 2024-03-08T22:52:28Z |
| format | Article |
| id | doaj.art-5790487aae764051b1947c6b42b06b85 |
| institution | Directory Open Access Journal |
| issn | 1947-5705 1947-5713 |
| language | English |
| last_indexed | 2024-03-08T22:52:28Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj.art-5790487aae764051b1947c6b42b06b852023-12-16T08:49:46ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132023-12-0114110.1080/19475705.2023.2218012Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, ChinaLilai Xu0Xue Yang1Shenghui Cui2Jianxiong Tang3Shengping Ding4Xiaomeng Zhang5Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu, ChinaInstitute for Disaster Management and Reconstruction, Sichuan University, Chengdu, ChinaKey Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, ChinaXiamen Municipal Natural Resources and Planning Bureau, Xiamen, ChinaDepartment of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, DenmarkInstitute for Disaster Management and Reconstruction, Sichuan University, Chengdu, ChinaAbstractHydrodynamics and socio-economic impacts of compound floods as the result of co-occurring pluvial and fluvial floods, have not been well studied, which challenges conventional urban flood risk management that treats different types of floods separately. This study generates a high-resolution land surface digital surface model based on images from unmanned aerial vehicles, and incorporates it into a combined flooding model that integrates the 1D river hydrodynamic model, 1D urban drainage hydrodynamic model and 2D overland flow model, in order to simulate the inundation characteristics of extreme floods when local pluvial floods coincide with upstream fluvial floods, and in a further step to quantify the direct economic losses on urban physical systems. As demonstrated by an empirical study of Longyan, China, the combination of pluvial and fluvial floods leads to substantial exacerbation in inundation extent and depth. Consequently, the joining of pluvial and fluvial floods greatly amplifies economic losses to urban physical systems, indicating that ignoring co-occurrence of different types of floods will potentially lead to underestimation of flood risk and insufficient adaptation. Our study emphasizes the need to account for the co-occurrence of multiple types of floods in flood risk assessment and management, to avoid the shortcomings of fragmented responses.https://www.tandfonline.com/doi/10.1080/19475705.2023.2218012Compound floodsunmanned aerial vehicles remote sensingdirect economic damagesurban physical systemintegrated flood model |
| spellingShingle | Lilai Xu Xue Yang Shenghui Cui Jianxiong Tang Shengping Ding Xiaomeng Zhang Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China Geomatics, Natural Hazards & Risk Compound floods unmanned aerial vehicles remote sensing direct economic damages urban physical system integrated flood model |
| title | Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China |
| title_full | Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China |
| title_fullStr | Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China |
| title_full_unstemmed | Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China |
| title_short | Co-occurrence of pluvial and fluvial floods exacerbates inundation and economic losses: evidence from a scenario-based analysis in Longyan, China |
| title_sort | co occurrence of pluvial and fluvial floods exacerbates inundation and economic losses evidence from a scenario based analysis in longyan china |
| topic | Compound floods unmanned aerial vehicles remote sensing direct economic damages urban physical system integrated flood model |
| url | https://www.tandfonline.com/doi/10.1080/19475705.2023.2218012 |
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