Welcome to WEAP's Website WEAP
WEAP is an initiative of the Stockholm Environment Institute.

About WEAP

What's New?
Sample Screens
History and Credits

Using WEAP
User Guide
Videos (YouTube)

User Forum
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Additional Support
University Courses

About Us
SEI-US Water Resources Program
Please Contact Us

Environmental News
Earlier flood forecasting could help avoid disaster in Japan
Researchers have revealed that a newly developed forecasting system can accurately predict flood locations 32 hours in a...

The end of Darwin's nightmare at Lake Victoria?
Lake Victoria, which came under the spotlight in 2004 by the documentary 'Darwin's nightmare', is not only suffering fro...

Managed retreat: A must in the war against climate change
Climate change will shape the future of coastal communities, with flood walls, elevated structures and possibly even flo...
Source: Science Daily
Interested in Energy?
Read about LEAP: SEI's software for energy planning.

Link WEAP and LEAP for combined Water-Energy planning.
Watch a video demo!

Sample Screens

Schematic: GIS tools for configuring your system. Drag and drop to create and position. Add ArcGIS or other standard GIS vector or raster files as background layers. Instant access to data and results for any node.
Schematic View

Data: Model building: create variables and relationships, enter assumptions and projections using mathematical expressions, dynamically link to Excel.
Data View

Results: Detailed and flexible display of all model outputs, in charts and tables and on the Schematic.
Results View

Results: Display results on the map
Results on the map

Scenario Explorer: Highlight key assumptions and indicators in your system and explore how changes in one can affect the other.
Scenario Explorer View

Notes: Document your data and assumptions.
Notes View

NEXT: Demonstration