Use of Mathematical Model and Satellite Data for Performance Evaluation of Flood Protection Scheme

Abstract

Analysis of temporal satellite data can be an effective, quick and convenient method to assess the performance of flood protection schemes after its construction. Concurrently, evaluation of performance of the structures for probable floods for an intended return period can be studied by developing a mathematical model of the river flows. The model output namely the water surface profile and velocity profile enables to compute the specification of flood protection structure. The present study evaluates the performance of flood protection work at Village Arjunpur in Buxor District of Bihar, India. The study was carried out based on analysis of temporal satellite data and flood frequency analysis of annual maximum floods. Mathematical modeling using HEC RAS was carried out to compute the water surface and velocity profile. This enabled calculation of design parameters for construction of revetments and its comparison with the adopted BIS design specification. The flood protection works was found to be effective in terms of protecting the Buxar-Koelwar Ganga (BKG) embankment on right bank of river Ganga near villages Arjunpur and Umarpur.