ArcSwat模型在汾河上游流域水环境治理中的模拟研究

Simulation of water environment treatment in the upper reaches of Fenhe River basin by ArcSwat model

为了模拟汾河上游流域水沙运移和污染物输出情况,本文基于流域基础数据构建ArcSwat模型,模拟结果表明该模型对产流、产沙及污染物输出的模拟精度高。通过模拟气候变化、土地利用变化和排污口优化等情境得到以下结论:ArcSwat模型可以精确模拟流域产流、产沙及污染物质运移,降雨是未来情景模式下污染物质输出的主要因素。土地利用变化对污染物质输出的影响是负面的,流域排污口优化可满足纳污能力的核定,应适当减少入河排污口的数量。综上所述,ArcSwat模型能较好地在汾河上游流域应用,能够为该流域水环境生态治理提供支持。

In order to simulate the water and sediment migration and pollutant output in the upper reaches of Fenhe River Basin,this paper constructs a ArcSwat model based on the basic data of the basin.The model results show that the model has high simulation accuracy for runoff,sediment and pollutant output.By simulating climate change,land use change and sewage outlet optimization,the following conclusions are obtained:ArcSwat model can accurately simulate watershed runoff,sediment production and pollutant migration in the basin and rainfall is the main factor of pollutant output in the future scenario model.The impact of land use change on the output of pollutants is negative.The optimization of drainage outlets in the basin can meet the verification of pollution carrying capacity,and the number of drainage outlets into the river should be appropriately reduced.In conclusion,AarcSwat model can be better applied in the upper reaches of Fenhe River Basin and can provide support for the ecological management of water environment in the basin.