Study On Function Regionalization And Simulation Of Water Quality And Quantity Joint Regulation In QueShan Reservoir Desilting Basin

This dissertation introduced a general situation of desilting basin of Qushan reservoir. We divided the water function of desilting basin base on the regulation of "sediment-water quality-geography" which integrated cluster analysis of 9 different cross-sections. There are two types of water function regionalization for desilting basin. Firstly, desilting basin was divided the into 4 function zones based on the variation of "sediment-geography" which are fewness sediment subsiding zone (Y1, Y2, Y3), heavy sediment subsiding zone (Y4, Y5, Y6), sediment subsiding stability zone (Y6, Y7, Y8)and stability zone (Y9). Secondly, desilting basin was divided by the variation of "water quality-sediment" into 4 categories in Spring and Summer were which are water distribution zone (Y1, Y2, Y3), fast sedimentation zone (Y4, Y5), slow sedimentation zone (Y6, Y7, Y8) and stability zone (Y9). In Autumn it could be divided into 3 function zones, water distribution zone (Y1, Y2, Y3), fast sedimentation zone (Y4, Y5), stability zone (Y6, Y7, Y8, Y9). EFDC simulated hydrodynamic process, sediment, and water quality of desilting basin. EFDC simulated water quality reasonably in the first 200 days, after that obvious error appears between simulated and measured, which is because of the measured date accuracy. Simulation of sediment is not stable due to the lack of data. Generally, EFDC could reappear the time and space distribution of the water quality.