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Flood impacts on urban road connectivity in southern China

Effective measures to improve road accessibility during storms are required as traffic congestion caused by storm floods increasingly constrains the efficiency of urban commuting. However, flood impacts on urban road connectivity are not yet well assessed due to inaccurate simulation of flood proces...

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Autores principales: Zhou, Ruitao, Zheng, Hang, Liu, Yueyi, Xie, Guanti, Wan, Wenhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9547071/
https://www.ncbi.nlm.nih.gov/pubmed/36207408
http://dx.doi.org/10.1038/s41598-022-20882-5
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author Zhou, Ruitao
Zheng, Hang
Liu, Yueyi
Xie, Guanti
Wan, Wenhua
author_facet Zhou, Ruitao
Zheng, Hang
Liu, Yueyi
Xie, Guanti
Wan, Wenhua
author_sort Zhou, Ruitao
collection PubMed
description Effective measures to improve road accessibility during storms are required as traffic congestion caused by storm floods increasingly constrains the efficiency of urban commuting. However, flood impacts on urban road connectivity are not yet well assessed due to inaccurate simulation of flood processes in urban areas where high-resolution data for drainage networks and gauged hydrological data are insufficient. Thus, this study assesses flood impacts on road network connectivity in an urban area of southern China through joint modeling of 1-D hydrodynamic processes in drainage networks and 2-D flood inundation processes on roads using MIKE Urban and MIKE 21. High-resolution DEM images of 5 m and a drainage network of 5635 pipelines were used for urban hydrological simulation. Flood depths were gauged for model calibration and validation by recruited volunteers in the context of citizen science. The results show that road network connectivity decreases as rainfall increases. More than 40% of road connectivity is lost in the study area when a 1-in-100-year return period rainfall occurs. The study results can help to inform more adaptive strategies for local flood control. The study methods are also applicable to improving urban hydrological modeling in broader regions.
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spelling pubmed-95470712022-10-09 Flood impacts on urban road connectivity in southern China Zhou, Ruitao Zheng, Hang Liu, Yueyi Xie, Guanti Wan, Wenhua Sci Rep Article Effective measures to improve road accessibility during storms are required as traffic congestion caused by storm floods increasingly constrains the efficiency of urban commuting. However, flood impacts on urban road connectivity are not yet well assessed due to inaccurate simulation of flood processes in urban areas where high-resolution data for drainage networks and gauged hydrological data are insufficient. Thus, this study assesses flood impacts on road network connectivity in an urban area of southern China through joint modeling of 1-D hydrodynamic processes in drainage networks and 2-D flood inundation processes on roads using MIKE Urban and MIKE 21. High-resolution DEM images of 5 m and a drainage network of 5635 pipelines were used for urban hydrological simulation. Flood depths were gauged for model calibration and validation by recruited volunteers in the context of citizen science. The results show that road network connectivity decreases as rainfall increases. More than 40% of road connectivity is lost in the study area when a 1-in-100-year return period rainfall occurs. The study results can help to inform more adaptive strategies for local flood control. The study methods are also applicable to improving urban hydrological modeling in broader regions. Nature Publishing Group UK 2022-10-07 /pmc/articles/PMC9547071/ /pubmed/36207408 http://dx.doi.org/10.1038/s41598-022-20882-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Zhou, Ruitao
Zheng, Hang
Liu, Yueyi
Xie, Guanti
Wan, Wenhua
Flood impacts on urban road connectivity in southern China
title Flood impacts on urban road connectivity in southern China
title_full Flood impacts on urban road connectivity in southern China
title_fullStr Flood impacts on urban road connectivity in southern China
title_full_unstemmed Flood impacts on urban road connectivity in southern China
title_short Flood impacts on urban road connectivity in southern China
title_sort flood impacts on urban road connectivity in southern china
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9547071/
https://www.ncbi.nlm.nih.gov/pubmed/36207408
http://dx.doi.org/10.1038/s41598-022-20882-5
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