Many regions are facing formidable freshwater management challenges. Allocation of limited water resources, environmental quality and policies for sustainable water use are issues of increasing concern. Conventional supply-oriented simulation models are not always adequate.
Over the last decade, an integrated approach to water development has emerged that places water supply projects in the context of demand-side issues, water quality and ecosystem preservation and protection. WEAP incorporates these values into a practical tool for water resources planning.
WEAP is distinguished by its integrated approach to simulating water systems and by its policy orientation. WEAP places the demand side of the equation – water use patterns, equipment efficiencies, reuse, costs and allocation – on an equal footing with the supply side – streamflow, groundwater, reservoirs and water transfers. WEAP thus provides a laboratory for examining alternative water development and management strategies.
WEAP is comprehensive, straightforward and easy-to-use, and attempts to assist rather than substitute for the skilled planner. As a database, WEAP provides a system for maintaining water demand and supply information. As a forecasting tool, WEAP simulates water demand, supply, runoff, streamflows, storage, pollution generation, treatment and discharge, and instream water quality. As a policy analysis tool, WEAP evaluates a full range of water development and management options, and takes into account multiple and competing uses of water systems.
The Sacramento Water Allocation Model, known as SacWAM, mimics one of the most complex water systems in the US.
Policy-makers can now model the effect of management options on the availability of habitat and the viability of aquatic species.
RDS helps stakeholders create a shared mental model of available opportunities and potential trade-offs for various objectives.
SEI researchers used the Gridded Meteorological Ensemble Tool for a water balance study in Bolivia, marking the first time the tool was applied outside the US.
This paper describes the development of poverty-related indicators in SEI's Water Evaluation And Planning (WEAP) tool.
An overview of the development scenarios for Rwanda SEI researchers co-created with stakeholders and explored using the LEAP and WEAP tools.
This study examines how the continued development of hydroelectric dams could affect one of the largest wetland systems in South America.
This paper evaluates a coupled water planning and crop model for irrigated agriculture that researchers deployed in Yolo County, California.
This document draws on SEI experience with WEAP and LEAP to provide guidance for mainstreaming gender and social equity issues into modelling studies
This paper describes the modelling of the Quiroz-Chipillico watershed in Peru to simulate impacts of possible changes within the hydrological system.
SEI researchers take a first step toward water analysis that considers inequality, by developing poverty-related indicators in WEAP.
A major update to SEI’s flagship water modelling tool enables policy-makers and researchers to more easily determine watershed boundaries and river pathways.
SEI researchers recently unveiled the first comprehensive model of Bolivia’s rivers, lakes and streams, as part of the Bolivia National Water Balance.
21 of California’s groundwater basins and sub-basins are critically overdrafted. We must break entrenched positions and find sustainable solutions.
Laura Forni explains how a large-scale scenario exercise could help decision-makers find the best way to allocate limited water resources.
The Sacramento Water Allocation Model enables policy-makers to weigh difficult trade-offs in water use, by simulating a complex water system in the US.
SEI adapted WEAP to assess the needs of chinook salmon and steelhead trout in the Santa Clara Valley Water District.
SEI worked with the Yolo County Flood Control and Water Conservation District to produce a Stormwater Resources Plan.