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.
This study analyses how managed aquifer recharge might affect irrigated agriculture in California's Kings Groundwater Basin during drought.
Urban and agricultural growth in Bolivian dry forests are putting pressure on groundwater and surface water supply. SEI research seeks to quantify the problem.
This article discusses how different climate scenarios affect the water-energy nexus in California, employing the WEAP modelling tool.
SEI researchers quantified the impact of irrigation and climate variability on the fluctuation of water levels in Lakes Titicaca and Poopó by applying WEAP.
This study demonstrates how incorporating social factors into water modelling can lead to a more equitable water supply.
About using the A web‐based platform called Supporting Water Resources Management (SWARM).
This study finds that water management is a larger threat to rice and ecosystems than the warming temperatures of climate change.
This article provides insights from a case study testing the Tandem framework for the co-design of climate services in Colombia's Campoalegre River Basin.
Investigadores de SEI presentan avances sobre la modelación estratégica utilizando el Sistema de Evaluación y Planeación del Agua (WEAP)
SEI built WEAP models for seven major river basins, enabling the exploration of policies and investments under various climate futures.
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 Senior Scientist Laura Forni explains why gender and income inform inequities in access to irrigation water in a rural Cambodian watershed.
SEI Senior Scientist Chuck A. Young explains why California saw severe water shortages this year and how better forecasting can help alleviate those challenges.
SEI's flagship water modelling tool helped a San Jose-area water district identify an opportunity to help protected steelhead in the wake of dam construction.
This perspective suggests how to better integrate water modelling into policymaking in countries of the Asia-Pacific.
The eWRIMS Analyzer transforms California’s water rights data into accessible reports on monthly water use in each watershed.
More than 100 updates to SEI's water modelling tool will bring faster and more precise results for its 40 000 users.
This World Water Day, six researchers share insights on the value of water and lessons learned on how to equitably manage and protect this valuable resource.
We propose five concepts that policymakers and planners can apply to help ensure water resilience amid climate change.
Clean, accessible water is a human right, and universal access is essential to global health. Effective water planning can help us get there.
SEI's Marisa Escobar, Alison Dyke, and Hector Angarita introduce the new SEI Initiative on Water Beyond Boundaries.
SEI Senior Scientist Brian Joyce explains the value of water models in an interview, the first in a series from the SEI US Water Program.
In this webinar, SEI scientists explain how to use SEI's two flagship modelling tools for integrated analyses of energy and water systems.
The de facto tool for water planning now calculates scenarios ten times faster than before.
The Mara River is a crucial water source for farms, villages and ecosystems. Researchers and stakeholders are working together to ensure it remains sustainable.
SEI is working with the U.S. Department of Energy and the California and Chinese governments to help policy-makers plan for resilient water and energy systems.
SEI teamed up with local partners to build a new water model in a Bolivian community. The results illuminate a path for policies that help the most vulnerable.
SEI's Charles Young and Stantec's Andy Draper won for their work on an unprecedented water model of the Sacramento-San Joaquin Delta.
SEI researchers Felipe Benavides and Jeanne Fernandez reflect on a recent tour of Bolivia's Tupiza watershed, where residents have "lost everything."
SWARM, a new platform for water management, combines hydrological modelling and stakeholder input to improve river basin management in Southeast Asia.
SEI experts explain how a new project will help Bolivia connect sanitation with watershed management.
Farmers in Bolivia are struggling as their water supply becomes increasingly unreliable. Could better models lead to policies that help the most vulnerable?
An innovative water management exercise fostered hands-on learning in Cambodia at a workshop held through the Sustainable Water Partnership.
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.
SEI is designing water allocation models that explicitly represent every water right and assess the impact of in-stream flow requirements on water users.