Distributed hydrological model, water and energy prediction, geotop can be applied to very complex terrain, and integrates all surface energy balance conditions except water balance. For saturated and unsaturated subsurface flow, 3D Richard equation is adopted to realize accurate input of radiation parameters to obtain surface temperature.

Epic is a continuous simulation model used to study the long-term effects of various soil erosion factors on crop production. Epic is a public domain model for studying the impact of soil erosion on crop production in more than 60 countries in Asia, South America and Europe. The model is used to study soil erosion, economic factors, hydrological models, weather effects, nutrition, plant growth dynamics and crop management. The main components of the epic are weather simulation, hydrology, erosion deposition, nutrient cycling, pesticide fate, plant growth, soil temperature, farming, economy and plant environmental control. Epic assessed the impact of soil erosion on productivity and predicted the impact of management decisions on soil, water, nutrient and pesticide movement, as well as their combined effects on soil fertility and managed soil loss, water quality and crop yield.

Saltmod is a computer program used to predict soil moisture, salinity of groundwater and drainage, depth of groundwater table and drainage flow in irrigated farmland (hydrology), using different (GEO) hydrological conditions and their changing water management options, including groundwater irrigation and the use of some crop rotation schedules.

Ramms:: avalanche model is used to simulate avalanche in complex terrain. The model has been widely used in avalanche hazard studies in Switzerland. The ramms:: avalanche model combines state-of-the-art digital solutions with helpful input features and friendly visualization tools. Many of the input and output features are optimized, enabling users to easily modify dangerous scenarios and control simulation results. The core of the program is an effective second-order numerical solution, that is, the depth averaged avalanche dynamic equation. In the 3D digital terrain model, the velocity and velocity of avalanche are calculated. Using the GIS type drawing feature, you can easily specify a single or multiple publishing areas. Users can get useful overview information about the simulation, including important information about the release area (average slope, total capacity), traffic behavior (maximum flow and height), and stop behavior (mass flow). Maps and remote sensing images can be superimposed on terrain models to help determine input conditions and calibrate models based on known events. The ramms:: avalanche model has been used in more than 70 places around the world, and the software has been successfully applied to high mountain areas such as the Alps, Himalayas, Andes, Rockies, tatare and other areas.