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A platform for research: civil engineering, architecture and urbanism
Urban Waterlogging Risk Profiling: The Case of Khatunganj Wholesale Commodity Market, Chattogram
Khatunganj, a busy trade region extending across an area along the Chaktai canal in Chattogram, has been severely affected by recurrent inundation for the last few years. The presented study used a reproducible methodology to develop a risk and vulnerability profile of Khatunganj connecting waterlogging with climate change scenario. For hydrologic-hydraulic modeling purpose, a model was set up on SWMM numerical modeling platform to simulate the discharge and water level at different points of the canal. Nine different scenarios of rainfall events were considered, where one actual rainfall event was taken, and the remaining scenarios were considered as design rainfall events. Using an inundation pattern combined with three other factors, namely, proximity to canal, structure type, and land use type of the area, the vulnerability of the area was assessed. Vulnerability of 224 households was calculated for low, average, and medium rainfall using the Household Sector Approach in ArcGIS. Analyses of the nine scenarios showed that even a 50% decrease in rainfall will generate a water level of 3.09 m to 3.84 m, whereas the elevation level of Khatunganj main road is between 2.9 m and 3.1 m. Results found that 27, 30, and 71 structures are very vulnerable at the time of low, medium, and high rainfall, respectively.
Urban Waterlogging Risk Profiling: The Case of Khatunganj Wholesale Commodity Market, Chattogram
Khatunganj, a busy trade region extending across an area along the Chaktai canal in Chattogram, has been severely affected by recurrent inundation for the last few years. The presented study used a reproducible methodology to develop a risk and vulnerability profile of Khatunganj connecting waterlogging with climate change scenario. For hydrologic-hydraulic modeling purpose, a model was set up on SWMM numerical modeling platform to simulate the discharge and water level at different points of the canal. Nine different scenarios of rainfall events were considered, where one actual rainfall event was taken, and the remaining scenarios were considered as design rainfall events. Using an inundation pattern combined with three other factors, namely, proximity to canal, structure type, and land use type of the area, the vulnerability of the area was assessed. Vulnerability of 224 households was calculated for low, average, and medium rainfall using the Household Sector Approach in ArcGIS. Analyses of the nine scenarios showed that even a 50% decrease in rainfall will generate a water level of 3.09 m to 3.84 m, whereas the elevation level of Khatunganj main road is between 2.9 m and 3.1 m. Results found that 27, 30, and 71 structures are very vulnerable at the time of low, medium, and high rainfall, respectively.
Urban Waterlogging Risk Profiling: The Case of Khatunganj Wholesale Commodity Market, Chattogram
Tarekul Islam, G. M. (editor) / Shampa, Shampa (editor) / Chowdhury, Ahmed Ishtiaque Amin (editor) / Nishat, Tasnim Alam (author) / Sunny, Dewan Salman (author) / Khan, Rifat Talha (author) / Mullick, Md.Reaz Akter (author) / Datta, Piyal (author)
Water Management: A View from Multidisciplinary Perspectives ; Chapter: 5 ; 93-119
2022-03-26
27 pages
Article/Chapter (Book)
Electronic Resource
English
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