WEAP: the Water Evaluation And Planning system is a Windows-based decision support system for integrated water resources management and policy analysis. WEAP is a model-building tool, used to create simulations of water demand, supply, runoff, evapotranspiration, infiltration, crop irrigation requirements, instream flow requirements, ecosystem services, groundwater and surface storage, reservoir operations, and pollution generation, treatment, discharge and instream water quality, all under scenarios of varying policy, hydrology, climate, land use, technology and socio-economic factors. WEAP can dynamically link to the USGS MODFLOW

MODFLOW

MODFLOW is the U.S. Geological Survey modular finite-difference flow model, which is a computer code that solves the groundwater flow equation. The program is used by hydrogeologists to simulate the flow of groundwater through aquifers...

 groundwater flow model and the US EPA QUAL2K surface water quality model.

WEAP was created in 1988http://www.weap21.org/index.asp?action=219, and continues to be developed and supported by the U.S. Center

Stockholm Environment Institute US Center

The Stockholm Environment Institute is an international research organization focusing on the issue of sustainable development. SEI has its headquarters in Stockholm with a network structure of permanent and associated staff worldwide and with centres the US, York , Oxford , Tallinn , and Asia...

 of the Stockholm Environment Institute

Stockholm Environment Institute

The Stockholm Environment Institute, or SEI, is a non-profit, independent research and policy institute specialising in sustainable development and environmental issues.-Mission:...

, a non-profit research institute based at Tufts University

Tufts University

Tufts University is a private research university located in Medford/Somerville, near Boston, Massachusetts. It is organized into ten schools, including two undergraduate programs and eight graduate divisions, on four campuses in Massachusetts and on the eastern border of France...

in Somerville, Massachusetts. It is widely used for climate change adaptation studies, and has been applied by researchers and planners in hundreds of organizations worldwide.

WEAP is distributed at no charge to non-profit, academic and governmental organizations based in developing countries.

External links

• WEAP Web Site
• WEAP User Guide
• WEAP Tutorial
• Stockholm Environment Institute-U.S. Center
• Main SEI web site
• Tufts University