Assessment of Urban Stormwater Drainage Network of the Southwest Zone in the Surat City

Authors : Arpit Sharma* and Dr. Ganesh D. Kale

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*Arpit Sharma PhD Student, Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat-395007, India

**Dr. Ganesh D. KaleAssociate Professor, Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat-395007, India

Abstract

Urban floods have been exacerbated by hydro-climatological changes linked with climate change and climatic variability, as well as impermeable covering over the soil in cities. Vulnerabilities such as flooding arise in typical urban storm water systems as the capacity of components within the system is overburdened and runoff accumulates at the surface. Owing to the construction of buildings and roads, urban growth continues to create an impervious ground surface, which raises the risk of flooding in urban areas. Thus, Storm Water Management Model (SWMM) is used in the present study to assess the adequacy of the storm water drainage network of the Southwest zone of the Surat city. The storm drainage network was assessed for 2-year, 5-year, 10-year, 20-year and 50-year return period storms. The result showed that, existing storm water drainage network have 17 hotspots corresponding to 2 year return period rainfall and these are increasing corresponding to 5, 10, 20 and 50 years return periods.