BASINS Climate Assessment Tool (CAT)

US EPA’s BASINS Climate Assessment Tool is a multi-purpose, environmental analysis system that integrates a geographical information system (GIS), national watershed data, and advanced watershed modeling tools, including the Hydrologic Simulation Program FORTRAN (HSPF) model, into one package.  It can be used to assess the coupled effects of climate and land use change, as well as to guide the development of effective management responses. A report providing documentation and user support materials for the tool is available here.