The bahm model is a tool to analyze the potential impacts of hydrological changes in land development projects and to grade structural solutions to mitigate the increased stormwater runoff in these projects. The software was developed in three counties in the San Francisco Bay Area: Alameda, San Mateo and Santa Clara.

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.

In the AgNPs model, the universal soil loss equation (USLE) is used to predict the erosion of a single rainfall event, even if USLE is not suitable for this purpose. A new improvement of USLE is more suitable for predicting the erosion of events, and also provides a mechanism for calculating the impact of slope runoff on erosion, which is not available in USLE.

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.