UM-18 : A flood control operation of a reservoir

Abstract

Reservoirs which are constructed for the purpose of conservation and flood control have to be operated for flood control during monsoon season in order to safeguard the down stream control points and the dam against damaging floods. Though flood forecasting models have been developed for some basins yet their utilisation during heavy down pour is in its infancy as they are dependent on communications that are subject to failure or on expert analysis that might not be available at the time. Thus it is necessary to have a guideline to the spillway operator at the reservoir site that will earmark the flood cushion requirement considering the importance of conservation and the restrainment to be shown towards the down- stream damaging centres. A methodology based on U.S.Army Corps of Engineers for the preparation of a spillway regulation curve is presented here.