Rainoff model is used to calculate the rainfall runoff of a watershed (hydrological catchment area). Its expansion is limited by the condition that rainfall can be evenly distributed in the area. This model can be downloaded for free.

Pism-pik model is developed by Potsdam Institute of climate impact to simulate large scale ice sheet shelf system. It comes from the parallel ice sheet model (bueler and brown, 2009). PISM v1.0 is open source with high resolution. Since 2011, it has been widely used as a tool for scientific research.

GSFLOW The model is developed by the U.S. Geological Survey to simulate the interaction between surface water and groundwater. The model considers the relationship between meteorological conditions, surface runoff, groundwater runoff and the interaction between surface water and groundwater. It is coupled with the rainfall runoff simulation system PRMs and the three-dimensional finite difference model modflow-2005. The model is suitable for the simulation of non spatial and temporal scales In order to evaluate the impacts of land use change, climate change and groundwater exploitation on surface hydrological process and underground hydrological process.

The n3dade model is used to evaluate solute transport in three-dimensional nonequilibrium porous media.

The common land surface model was developed by scientists interested in land model for public use and further development. The main characteristics of the model include sufficient non-uniform interlayer to fully represent soil temperature and soil moisture, and multi-layer parameterization of snow process; clear treatment of liquid water and ice water quality in snow soil system; runoff parameterization under the concept of topmeod; a canopy photosynthetic conductivity model, which describes the simultaneous transfer of carbon dioxide and water vapor in plants; and a model of canopy photosynthesis conductivity; The sub grid fraction of energy and water balance is tiled. CLM has been widely evaluated in offline mode and coupled with the NCAR community climate model (CCM3).

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.