By using GIS and RS,SWAT was developed to predict the impact of land management practices on water,sediment and agricultural chemical yields in large complex watersheds with varying soils,land use and management conditions in the long-term.

• 它能够利用gis和RS提供的空间数据信息,模拟复杂大流域中多种不同的水文物理过程,包括水、沙、化学物质和杀虫剂的输移与转化过程。