HydroGeoSphere model is jointly developed by water loo University, Laval University and hydrogeologic company. It can simulate the flow and solute transport process of groundwater and surface water in three dimensions. The model has two coupling modes for groundwater and surface water: the common node mode assumes that the instantaneous consistency of water head is maintained between the surface and the groundwater body, and the water exchange between the surface and groundwater is not calculated in the coupling process of the model; the dual node mode does not assume the continuity of the water head between the two systems, but describes the surface and ground by Darcy flow relationship The flow exchange between the lower water bodies.