Evaluation of Irrigation Safety by Operation Management of Water Supply from Large Scale Agricultural Reservoirs

Abstract

Due to recent climate change, droughts occur frequently, thereby causing a shortage of agricultural water. However, supplies to most agricultural reservoirs have been designed assuming that droughts occur at a frequency of 10 years. Therefore, continuous drought has led to low storage rates. Thus, in this study, a water balance analysis was performed on the Naju reservoir, and the changes in the water shortage according to the minimum storage rate restriction management to cope with drought were evaluated. As a result, a higher management storage rate level results in a higher initial storage rate in the next year, thereby decreasing the annual average shortage. In addition, it shows that a decrease in the frequency of drought and its intensity can be reduced according to the minimum storage management during wet years.