结合GIS与RS技术的分布式水文模型已成为当今水文界研究的重点。从气象与水文水资源学科交叉的角度对SWAT分布式水文模型进行研究，并将其应用于白莲河流域，以此探讨该模型在中小流域的适用性。模拟结果表明，SWAT模型能够较好地模拟白莲河流域日径流过程，具有一定适用性。

The distributed hydrological model has become a key issue of hydrology research based on the GIS and RS technologies now. This paper introduces the SWAT (soil and water assessment tool) model from the intersection view of hydrology and meteorology. The model was applied to Bailian River valley of Hubei Province so as to discuss its adaptability in flow simulation of the mid-small valley. In combination with DEM, vegetation and soil data, and through model pre-processing, the framework of SWAT model for Bailian River valley was established. The results show that the SWAT model can reflect the daily flow hydrological process of the basin on the whole and can be adaptable for the valley.