A STUDY ON NEW DETEMINATION METHOD OF DAM RESERVOIR DISCHARGE FOR FLOOD CONTROL CAPACITY IMPROVEMENT OF EXISTING DAM RESERVOIR

A new method of flood control by gate operation based on runoff characteristics of a basin is proposed in this paper. This method is based on an anticipatory release approach and the idea that there is no risk in reducing reservoir levels if the amount of anticipatory release is equal to the amount of inflow which will flow into the dam for certain from the rainfall that has already fallen. In this method, rainfall prediction or weather forecasting will not be necessary for flood control. The amount of anticipatory release will be calculated by the real time inflow into the reservoir or accumulated rainfall. And reservoir levels will certainly be restored to there former condition, because the amount of discharge is based on the area under the recession part of the hydrograph.