Effects of non-point source pollution of nitrogen and phosphorus on water quality of the Yuqiao Reservoir
Yuqiao Reservoir is the unique water source for the water supply of Tianjin City.It's important to study the effects of the non-point pollution around Yuqiao Reservoir on the water quality in order to improve the water environment and guarantee quality of water supply.Based on the analysis of non-point pollution load,a coupled two-dimensional hydrodynamic and pollutant transport model was developed using the two-dimensional shallow water and pollutant transport equations.The two-dimensional model was used to simulate the temporal and spatial distribution characteristics of TN and TP in the reservoir water from June to September in 2008.The simulation results showed that(1)under the effects of inflow of Guo River and dominant wind direction in the wet period,TN and TP concentrations diffuse towards the dam site along the south and northwest coastlines,and form the clockwise circumfluence in the east area and the counterclockwise circumfluence in the west area of the reservoir;(2)due to circulation,the water quality in the reservoir center is less affected by the pollution;(3)TP concentration in the east is higher than that in the west of the reservoir,and the average concentration of TP in August is the highest(1.56 mg/L);and(4) Liuxiangying and Wubaihu are the main pollution ports of TN,and the average concentration of the TN in September is the highest(3.74 mg/L).
total nitrogentotal phosphorusspatial and temporal distributionnumerical simulationYuqiao Reservoir
国家科技期刊平台
NSTL
万方数据
维普
