The soil water balance (SWB) model is used to calculate the spatial and temporal variations of groundwater recharge. The SWB model calculates replenishment by combining common geographic information system (GIS) data layers with tabular climate data.

At present, the plastic tarpaulin used in soil fumigation process has been proved to be able to penetrate into the fumigation steam and cause obvious loss to the atmosphere. New low permeability membranes are being developed to reduce fumigant emissions and improve efficacy. A fast, reliable and sensitive method is needed to measure the permeability of various membranes that may be used in new management practices. Filmpc provides a method for estimating the mass transfer coefficient (H) of fumigants in agricultural films. H is a measure of diffusion resistance. Unlike other permeability measurement methods, h is an attribute of film chemical combination, independent of the concentration gradient of the whole film. The model relies on a mass balance method, and adsorption and diffusion are carried out on the membrane. The results show that this method produces a sensitive and reproducible method for measuring membrane permeability.

Gawser is a temperature index snow melting model which can be used to verify the hydrology of the basin. It is most suitable for agricultural or forest watersheds, but can be used to demonstrate the hydrology of other types of watersheds, such as urban or suburban water sheds. Gawser is suitable for basins with different development levels and can be used to show the impact of development on watershed hydrology. For example, in order to observe the hydrological impact of deforestation on agriculture, data can be used to simulate hydrological conditions in forest basins, and then reprogrammed to simulate hydrology in agricultural watersheds. We can study the behavior of runoff, infiltration, base flow and other hydrological conditions in each watershed.

Exams is an interactive software application for developing aquatic ecosystem models and rapidly assessing the processes, transport and exposure concentrations of synthetic organic chemicals, including pesticides, industrial materials and waste disposal sites. Exams contains an integrated database management system (DBMS), which is specially used to store and manage the project database required by the software. User interaction is provided by a fully functional command line interface (CLI), the use of flexible help menus, an online data dictionary, and a cli user guide, and maps the ability to check output data.

Ice and ACE were developed by the U.S. Environmental Protection Agency in collaboration with other federal agencies, industry and universities to address data gaps in species sensitivity and reduce reliance on uncertainties in ecological risk assessment.

BIOME3 model is a balanced terrestrial biosphere model. It attempts to combine biogeography and biogeochemical modeling to simulate vegetation distribution and biogeochemical characteristics in a global framework, and to couple vegetation distribution into biogeochemistry.