Key words: Urban flood, Strom water management, SWMM, Rational formula Parameters needed for rational method are taken from CPHEEO manual, and for obtaining design intensity a frequency analysis is carried out. Runoff is also obtained from rational formula for comparison purpose. Thereafter, the EPA SWMM is used to simulate the response of catchment to rainfall events in which runoff, water depth profile, and outflow hydrograph are obtained. The selected extreme daily event was disaggregated into hourly events using reduction formula. Topographical data such as area, width, length, etc. Arc-GIS (10.1) used for processing DEM (Digital Elevation Model) and LULC (Land Use Land Cover) data to obtain elevation and imperviousness respectively. Daily rainfall data is obtained from nearby Asarjan raingage station. The catchment is divided in to 98 small sub catchments, 31 conduits, with 31 junction nodes. The drainage line and sub-catchments are defined using percentage of imperviousness and further divided according to elevation. The paper describes a feasible application of EPA SWMM simulation to a typical hydrologic unit represented by an educational campus Nanded about which relatively accurate information of physical characteristics is readily available. This has necessitated use of simulation studies for understanding complexities related to the urban flood management. Such urban flooding is basically due to the defective and inefficient urban drainage systems, and cause damage to public and private buildings and disrupts public life.
Corresponding author E-mail: * © SRTM University’s Research Journal of Science ABSRTACT Urban flooding is significantly different from rural flooding as Urbanization leads to developed catchments, which in turn increases the flood peaks by 1.8 to 8 times and flood volumes by nearly 6 times1. Waikar* and Undegaonkar Namita U Department of Civil and Water Management Engineering, Shri Guru Gobind Singhji Institute of Engineering and Technology Nanded, (M.S) India. Urban Flood Modeling by using EPA SWMM 5 M.
Special Volume on ‘Clean Earth-Green Earth’, SRTM University’s Research Journal of Science April 2015 /Spl.