特定小流域水质模型的选择

DETERMINATION OF THE WATER QUALITY MODEL FOR A SPECIFIC SMALL BASIN

根据特定小流域的水文特点和实际要求,建立一个流域综合水质模型,它由三个子模型支持,即:河流水质模型、水库富养营化模型和非点源污染模型。本工作对河流水质模型(QUAL2EU)加以改进,使之适应W河的具体情况,并在QUAL2EU增加了模拟COD、网箱养鱼和底泥泛起的功能。完成了作为水源地的水库富营养化模型,解决了流域内农业耕作、污水灌溉等造成的非点源污染随降雨径流进入水体过程的模拟和计算,使之与河流模型和水库模型结为有序的流域水质模型。此模型可以对流域进行优化管理。

Based on field on-site investigation and the hydrological property of a specific small basin, a synthetical water quality model was selected which was composed of a river water quality model(QUAL2EU), a reservior eutro-phication model and a nonpoint pollution model. The river model was modified to meet the practical demand for simulation of COD, cages fishing and sediment resuspension within the framwork of QUAL2EU. The euthrophica-tion model of the reservior was estibilished. The nonpoint source pollution from agriculture land with dense population, fertilizer application and was-tewater irrigation was simulated and combined with the river model and reservior model to make a systematic basin water quality model. This model can be used to optimize management for the river basin.