Connecting hydrological and water quality models for prediction research of reservoir water quality

Two powerful watershed and water quality models(AnnAGNPS and CE-QUAL-W2) were integrated In this paper.The non-point source pollution loading of AnnAGNPS model input the CE-QUAL-W2 model.The CE-QUAL-W2 model was applied to simulate water quality in the Jinpen Reservoir and study of non-point source pollution on water quality of reservoir.When predicting the water quality of reservoir non-point source pollutions should be treated differently in flood and non-flood period.Non-point source pollution had great impact for water quality of Jinpen Reservoir in flood period,but non-point source pollution had less impact for reservoir water quality in non-flood period.The impacts made a great difference between longitudinal and vertical water quality.Forest played a significant role for non-point source pollution reduction in the watershed.