Study of Effect of Current Control for Restoring Reservoir Water Quality by Simulation Model

Abstract

Current control using dispersed aeration is one way to suppress algal blooms by controlling the hydraulic state of the reservoir artificially. We have studied current control method in both the planning stage and the practical stage. This report estimates the effect of measures to improve water quality using a simulation model in the planning stage.
We examined the effect of current control to improve the water quality of reservoirs, by simulation using a modified one-dimensional model for current control using dispersed aeration, the parameters of which were determined by experiments in several reservoirs. The results show that current control is effective but that aeration must be stopped in case of flood and that care must be taken not to upwell dense turbid water when resuming aeration.