Identification of Flood-Inundated Areas Using HecRAS Model: A Case Study of Upper Sabarmati River Basin, Gujarat, India

Identification of flood-inundated areas under different flood levels in a river basin is an important step to control and properly manage floods. Topography plays an important role in identifying vulnerable areas. River flood plain areas are most vulnerable to flooding requiring proper study. The flood management in any basin depends on the rain-fall events, surface runoffs, water surface elevation profiles, cross-section of the river basin, river bank profiles, elevation profiles, and ground level of low-lying areas. In the present study, downstream area of the Upper Sabarmati River basin between Dharoi Dam and Derol Bridge has been modeled using 1D HecRAS software for identifying inundation areas under different flood scenarios for proper flood management.