The swrrbwq model simulates hydrology, sediment, nutrient and pesticide transport in a large and complex rural watershed. The accuracy of the watershed management model in terms of rainfall, sediment use, and soil management can be reasonably explained in terms of the accuracy of the operation of the watershed model in terms of rainfall, soil use and so on.

Topoflow is a powerful and spatially distributed hydrological model with a user-friendly click interface. Its main purpose is to simulate many different physical processes in a watershed, and its goal is to accurately predict how various hydrological variables will evolve in response to climate forces.

Soil vegetation atmosphere transport (SVAT) model plays an important role in studying the interaction and relationship between atmospheric water, plant water, surface water, soil water and groundwater, plant water consumption process and ecological water demand, feedback mechanism between ecosystem and local climate, interaction mechanism between soil moisture and vegetation, and restoration and reconstruction of ecological environment. SVAT model has developed from single layer model to double layer model and multi-layer model after about half a century development of "bucket" model, biophysical model and biochemical model.