Steady flood flow analysis for the Godavari River reach in Nashik using HEC-RAS and ArcGIS
Shubham Saxena, Biki Kumar Das
Floods have been repetitive phenomenon in the study area. River Godavari flows through Nasik city. The River has almost 10 km reach passing through city. To facilitate the appropriate measures for effective flood mitigation in advance, there is a need to model the flood plain. The present study represents flood simulation of Godavari river reach in Nasik using HEC-RAS as software. Digital Elevation Model (DEM) of Nasik city is used as main input for steady flood flow analysis. Intensity duration frequency (IDF) curve is used to obtain maximum and minimum rainfall intensity for different return periods. From theses intensities discharge is calculated for different return period which is being used as main input for performing steady flood flow analysis. Three discharges are used based upon minimum and maximum rainfall intensity hence three flood flow profiles have been created. The aim of the present study was to create flood flow profiles which can be helpful in suggesting remedial measure against the future flood situations.