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.

As a global 3D atmospheric chemical transport model (CTM), geoschem mainly aims at the source and sink of atmospheric components and the physical and chemical effects in the transport process, so as to simulate the actual concentration distribution and evolution process of each component. GEOS Chem uses the meteorological plants from GEOS assimilation provided by NASA's global modeling and data assimilation Office (gmao) as the initial field to drive the model. The geoschem model includes a detailed tropospheric ozone NOx VOC aerosol Hox chemical process. It fully considers the joint effect of emission sources and natural sources. It considers that the emission of CO, NOx and SO2 is taken as the default in geoschem, using Edgar 3.2's monthly global inventory in 2000, while the anthropogenic non methane VOC is used as the default, using retro 2000 as the default Geoschem uses the advection algorithm of tpcore to simulate the horizontal transport process, which is consistent with the GEOS GCM meteorological simulation, while the convective mass flux calculation includes wet deposition, dry deposition and sea salt deposition. The geoschem mixing in the boundary layer uses a non local scheme, and the simulation of mercury is extended from the original geoschem air sea coupling simulation to a coupled atmosphere ocean land model.

Unsoda v2.0 is a database of unsaturated soil hydraulic properties completed by the U.S. geotechnical office in 1999. It collects the data of soil physical properties such as water characteristic curve, hydraulic conductivity and soil water dispersion, particle size distribution, bulk density and organic matter content of 11 different texture soils from sandy soil to clay.

WOFOST is a single site simulation system developed by Wageningen University in the Netherlands. A dynamic interpretative model based on process was developed to simulate crop growth process under the influence of climate and other environmental factors (such as soil water and fertilizer), such as photosynthesis, respiration, transpiration, leaf area change, dry matter distribution and yield formation. The model can simulate crop growth process and crop yield under three conditions: sufficient water and fertilizer supply (potential growth condition), water limitation (rain fed condition) and nutrient limitation (insufficient supply of N, P, K).

High resolution land data assimilation system (hrldas) is an off-line driving force of land surface model existing in weather research and prediction (WRF) model. Hrldas uses a combination of observational and analytical measurements (precipitation, solar and longwave radiation, and surface wind, humidity, and temperature) to drive land surface models to simulate the evolution of land surface conditions (e.g., soil moisture and temperature, snow, etc.). The system has been developed and can run on the WRF domain or multiple site locations.

Algorithm model of continuous multi flow confluence

simple FORTRAN 77 program has implemented three published limit equilibrium slope stability analysis methods for post landslide investigation.

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.

DNDC is a computer simulation model of carbon and nitrogen biogeochemistry in agricultural ecosystems. The model can be used to predict crop growth, soil temperature and moisture status, soil carbon dynamics, nitrogen leaching and trace gas emissions, including nitrous oxide (N2O), nitric oxide (no), nitrogen (N2), ammonia (NH3), methane (CH4) and carbon dioxide (CO2).