Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data

Global climate change and rapid urbanization have caused increases in urban floods. Urban flood risk assessment is a vital method for preventing and controlling such disasters. This paper takes the central region of Cangzhou city in Hebei Province as an example. Detailed topographical information, s...

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Autores principales:	Lidong Zhao, Ting Zhang, Jun Fu, Jianzhu Li, Zhengxiong Cao, Ping Feng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	urban flood damage curve risk assessment GF-2 data coupled model Science Q
Acceso en línea:	https://doaj.org/article/52e44b99b720409588912c5b910b006b
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spelling	oai:doaj.org-article:52e44b99b720409588912c5b910b006b2021-11-11T18:55:08ZRisk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data10.3390/rs132143812072-4292https://doaj.org/article/52e44b99b720409588912c5b910b006b2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4381https://doaj.org/toc/2072-4292Global climate change and rapid urbanization have caused increases in urban floods. Urban flood risk assessment is a vital method for preventing and controlling such disasters. This paper takes the central region of Cangzhou city in Hebei Province as an example. Detailed topographical information, such as the buildings and roads in the study area, was extracted from GF-2 data. By coupling the two models, the SWMM and MIKE21, the spatial distribution of the inundation region, and the water depth in the study area under different return periods, were simulated in detail. The results showed that, for the different return periods, the inundation region was generally consistent. However, there was a large increase in the mean inundation depth within a 10-to-30-year return period, and the increase in the maximum inundation depth and inundation area remained steady. The comprehensive runoff coefficient in all of the scenarios exceeded 0.8, indicating that the drainage system in the study area is insufficient and has a higher flood risk. The flood risk of the study area was evaluated based on the damage curve, which was obtained from field investigations. The results demonstrate that the loss per unit area was less than CNY 250/m<sup>2</sup> in each return period in the majority of the damaged areas. Additionally, the total loss was mainly influenced by the damaged area, but, in commercial areas, the total loss was highly sensitive to the inundation depth.Lidong ZhaoTing ZhangJun FuJianzhu LiZhengxiong CaoPing FengMDPI AGarticleurban flooddamage curverisk assessmentGF-2 datacoupled modelScienceQENRemote Sensing, Vol 13, Iss 4381, p 4381 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	urban flood damage curve risk assessment GF-2 data coupled model Science Q
spellingShingle	urban flood damage curve risk assessment GF-2 data coupled model Science Q Lidong Zhao Ting Zhang Jun Fu Jianzhu Li Zhengxiong Cao Ping Feng Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data
description	Global climate change and rapid urbanization have caused increases in urban floods. Urban flood risk assessment is a vital method for preventing and controlling such disasters. This paper takes the central region of Cangzhou city in Hebei Province as an example. Detailed topographical information, such as the buildings and roads in the study area, was extracted from GF-2 data. By coupling the two models, the SWMM and MIKE21, the spatial distribution of the inundation region, and the water depth in the study area under different return periods, were simulated in detail. The results showed that, for the different return periods, the inundation region was generally consistent. However, there was a large increase in the mean inundation depth within a 10-to-30-year return period, and the increase in the maximum inundation depth and inundation area remained steady. The comprehensive runoff coefficient in all of the scenarios exceeded 0.8, indicating that the drainage system in the study area is insufficient and has a higher flood risk. The flood risk of the study area was evaluated based on the damage curve, which was obtained from field investigations. The results demonstrate that the loss per unit area was less than CNY 250/m<sup>2</sup> in each return period in the majority of the damaged areas. Additionally, the total loss was mainly influenced by the damaged area, but, in commercial areas, the total loss was highly sensitive to the inundation depth.
format	article
author	Lidong Zhao Ting Zhang Jun Fu Jianzhu Li Zhengxiong Cao Ping Feng
author_facet	Lidong Zhao Ting Zhang Jun Fu Jianzhu Li Zhengxiong Cao Ping Feng
author_sort	Lidong Zhao
title	Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data
title_short	Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data
title_full	Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data
title_fullStr	Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data
title_full_unstemmed	Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data
title_sort	risk assessment of urban floods based on a swmm-mike21-coupled model using gf-2 data
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/52e44b99b720409588912c5b910b006b
work_keys_str_mv	AT lidongzhao riskassessmentofurbanfloodsbasedonaswmmmike21coupledmodelusinggf2data AT tingzhang riskassessmentofurbanfloodsbasedonaswmmmike21coupledmodelusinggf2data AT junfu riskassessmentofurbanfloodsbasedonaswmmmike21coupledmodelusinggf2data AT jianzhuli riskassessmentofurbanfloodsbasedonaswmmmike21coupledmodelusinggf2data AT zhengxiongcao riskassessmentofurbanfloodsbasedonaswmmmike21coupledmodelusinggf2data AT pingfeng riskassessmentofurbanfloodsbasedonaswmmmike21coupledmodelusinggf2data
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Risk Assessment of Urban Floods Based on a SWMM-MIKE21-Coupled Model Using GF-2 Data

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