International Conference on Sustainable Infrastructure 2019
Urban Flood Hazard Modeling and Mapping Using PCSWMM
Publication: International Conference on Sustainable Infrastructure 2019: Leading Resilient Communities through the 21st Century
ABSTRACT
“Urban flood” during monsoon becomes an unavoidable experience due to land use changes along with uneven rainfall distribution and the existing drainage system often fails to dispose stagnant water. In this connection, personal computer stormwater management model (PCSWMM) 2D software was adopted as a predictive tool to estimate flood depth for Chittagong, Bangladesh. Firstly, the non-parametric Mann-Kendall trend test was used to analyse rainfall amount and extreme events during 1949–2016. Secondly, magnitudes of the changes in rainfall events were acquired. Thirdly, daily as well as consecutive days’ annual maximum rainfall data in the different return periods were estimated by Weibull’s and Gumble’s methods to develop a rainfall intensity-duration-frequency curve. Finally, PCSWMM simulated flood depths were used to prepare the flood hazard map using ArcGIS10.1. Based on the inundation depths, inundated areas were classified into eight qualitative hazard classes. Therefore, it is envisaged that the applied approach could be a useful means.
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ACKNOWLEDGEMENTS
This study has been carried out under the Department of Disaster and Environmental Engineering, Chittagong University of Engineering and Technology (CUET), Bangladesh logistic and technical supports. Funding for this study came for completion of a masters degree. Additionally, laboratory facilities and guidance from the Department of Civil Engineering are also acknowledged. Last but not least, a number of supports need to be stated i.e. CPA, BWDB and CWASA for their invaluable suggestions, comments and advices during sampling in the field.
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Information & Authors
Information
Published In
International Conference on Sustainable Infrastructure 2019: Leading Resilient Communities through the 21st Century
Pages: 57 - 68
Editors: Mikhail V. Chester, Ph.D., Arizona State University, and Mark Norton, Santa Ana Watershed Project Authority
ISBN (Online): 978-0-7844-8265-0
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Nov 4, 2019
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