Application of SWAT Model to Zhangweinan Canal Sub-Watershed

Hydrological and water quality simulation faces big challenge because of intensive human activities in the Zhangweinan Canal sub-watershed of the Hai River basin. The Soil & Water Assessment Tools (SWAT) modeling system was established depended on various of spatial and attribute data of this watershed, and parameters for hydrological, water quality and evapotranspiration (ET) simulation were calibrated and verified using measured stream flow, water quality and remote-sensing derived ET data, and different scenarios were simulated and analyzed. The results show that point source pollution contributed most of the pollutant loadings of pollutants in Zhangweinan sub-watershed, and non-point source pollution (NPS) contributes small and NPS pollutant losses are predominantly located in mountainous area.