Adequacy assessment of an urban drainage system considering future land use and climate change scenario

Dhaka, the capital of Bangladesh, has been experiencing severe water-logging and urban flooding in the last few decades. In this paper, we estimate the peak storm runoff of Hatirjheel-Begunbari canal – the largest drainage system of the city – under different operational, land use and climate scenar...

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Autores principales:	S. Afrin, M. M. Islam, M. M. Rahman
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	catchment delineation climate change hatirjheel-begunbari canal land use stormwater runoff waterlogging Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/4b909c2fccff491ba130ad32af1a38a3
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id	oai:doaj.org-article:4b909c2fccff491ba130ad32af1a38a3
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spelling	oai:doaj.org-article:4b909c2fccff491ba130ad32af1a38a32021-11-05T19:02:13ZAdequacy assessment of an urban drainage system considering future land use and climate change scenario2040-22442408-935410.2166/wcc.2020.369https://doaj.org/article/4b909c2fccff491ba130ad32af1a38a32021-08-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/5/1944https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Dhaka, the capital of Bangladesh, has been experiencing severe water-logging and urban flooding in the last few decades. In this paper, we estimate the peak storm runoff of Hatirjheel-Begunbari canal – the largest drainage system of the city – under different operational, land use and climate scenarios (2013, 2025 and 2040). Our method includes digital elevation model (DEM) reconditioning, watershed delineation, and development of future land use scenario. We apply HEC-RAS to check the adequacy of Begunbari canal cross-sections to carry peak runoff for the scenarios considered here. The Hatirjheel-Begunbari system is found to drain stormwater from ∼25% of the city. Within the system, built-up areas are increasing linearly by 0.8 Km2/year, whereas water body and wetlands are decreasing exponentially, which might increase the runoff coefficient by 11% in 2040 relative to 2013. Climate-induced change in rainfall intensity along with land-use change show three times higher runoff in 2040 than in 2013. Around 58% of canal cross-sections appear to be overflown at both banks while carrying a 5-year return period peak runoff under the 2013 scenario. For future scenarios, all sections seem to cause an overflow, which is alarming. HIGHLIGHTS Digital elevation model (DEM) reconditioning and catchment delineation of Hatirjheel-Begunbari (HB) – the largest drainage system of Dhaka.; Estimation of recent and future runoff intensity considering future precipitation variability due to climate change.; Development of future land use scenario.; Estimation of peak stormwater runoff and capacity assessment of Begunbari canal using HEC-RAS.;S. AfrinM. M. IslamM. M. RahmanIWA Publishingarticlecatchment delineationclimate changehatirjheel-begunbari canalland usestormwater runoffwaterloggingEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 5, Pp 1944-1957 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	catchment delineation climate change hatirjheel-begunbari canal land use stormwater runoff waterlogging Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	catchment delineation climate change hatirjheel-begunbari canal land use stormwater runoff waterlogging Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 S. Afrin M. M. Islam M. M. Rahman Adequacy assessment of an urban drainage system considering future land use and climate change scenario
description	Dhaka, the capital of Bangladesh, has been experiencing severe water-logging and urban flooding in the last few decades. In this paper, we estimate the peak storm runoff of Hatirjheel-Begunbari canal – the largest drainage system of the city – under different operational, land use and climate scenarios (2013, 2025 and 2040). Our method includes digital elevation model (DEM) reconditioning, watershed delineation, and development of future land use scenario. We apply HEC-RAS to check the adequacy of Begunbari canal cross-sections to carry peak runoff for the scenarios considered here. The Hatirjheel-Begunbari system is found to drain stormwater from ∼25% of the city. Within the system, built-up areas are increasing linearly by 0.8 Km2/year, whereas water body and wetlands are decreasing exponentially, which might increase the runoff coefficient by 11% in 2040 relative to 2013. Climate-induced change in rainfall intensity along with land-use change show three times higher runoff in 2040 than in 2013. Around 58% of canal cross-sections appear to be overflown at both banks while carrying a 5-year return period peak runoff under the 2013 scenario. For future scenarios, all sections seem to cause an overflow, which is alarming. HIGHLIGHTS Digital elevation model (DEM) reconditioning and catchment delineation of Hatirjheel-Begunbari (HB) – the largest drainage system of Dhaka.; Estimation of recent and future runoff intensity considering future precipitation variability due to climate change.; Development of future land use scenario.; Estimation of peak stormwater runoff and capacity assessment of Begunbari canal using HEC-RAS.;
format	article
author	S. Afrin M. M. Islam M. M. Rahman
author_facet	S. Afrin M. M. Islam M. M. Rahman
author_sort	S. Afrin
title	Adequacy assessment of an urban drainage system considering future land use and climate change scenario
title_short	Adequacy assessment of an urban drainage system considering future land use and climate change scenario
title_full	Adequacy assessment of an urban drainage system considering future land use and climate change scenario
title_fullStr	Adequacy assessment of an urban drainage system considering future land use and climate change scenario
title_full_unstemmed	Adequacy assessment of an urban drainage system considering future land use and climate change scenario
title_sort	adequacy assessment of an urban drainage system considering future land use and climate change scenario
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/4b909c2fccff491ba130ad32af1a38a3
work_keys_str_mv	AT safrin adequacyassessmentofanurbandrainagesystemconsideringfuturelanduseandclimatechangescenario AT mmislam adequacyassessmentofanurbandrainagesystemconsideringfuturelanduseandclimatechangescenario AT mmrahman adequacyassessmentofanurbandrainagesystemconsideringfuturelanduseandclimatechangescenario
_version_	1718444036103077888

Adequacy assessment of an urban drainage system considering future land use and climate change scenario

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