Distributed Watershed Hydrological Simulation Method Based on SWAT Model

Aiming at the problems of large simulation error and long time consumption in traditional distributed hydrological simulation methods, a distributed hydrological simulation method based on SWAT model is proposed in this paper. This paper analyzes the working principle of SWAT model and constructs SWAT model; uses baseline drift method and variable storage coefficient model to extract typical characteristics of groundwater runoff, soil moisture evaporation and water surface concentration of distributed watershed hydrological characteristic data; on this basis, analyzes the spatial distribution characteristics of precipitation, modifies the precipitation coefficient, and through the coefficient of linear regression equation and efficiency coefficient and adjust the root mean square error to realize the distributed hydrological simulation. The experimental results show that the minimum error of the proposed method is about 0.01%, and the maximum simulation time is about 5.8 s.