Prediction of pollutant movement in a regulated large river Available to Purchase

The major purpose of this study is to find out how possible it is to predict long-term river water quality variation using the coupled water quality prediction model in the lower reach of the River Geum from Daechung Dam, South Korea. The Water Quality Analysis Simulation Program 5 (WASP5) and Hydrologic Engineering Centre (HEC-2) models have been coupled and applied to find the possibility of simulation of long-term river water quality variation. The chlorophyll-a concentration in the main river was estimated by changing the PO₄−P and/or NH₃−N concentrations flowing from tributaries. The study results show that the trend of longitudinal variation of simulated water quality variables is consistent with that of measured water quality variables. The variation of chlorophyll-a concentration in the main river was almost negligible except when both NH₃−N and PO₄−P concentrations from Gab stream and Miho stream are decreased by about 70%. Based on the study results, it can be concluded that the coupled water quality prediction model is highly applicable to this regulated large river for water quality management.