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
Members List
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Additional Support
University Courses

About Us
SEI-US Water Resources Program
Please Contact Us

Environmental News
What can stream quality tell us about quality of life?
Findings reveal that demographics such as race and population density, as well as health indices such as cancer rates an...

'Falling insect' season length impacts river ecosystems
Insects that fall from the surrounding forest provide seasonal food for fish in streams. Researchers have shown that the...

Antarctic seals reveal worrying threats to disappearing glaciers
More Antarctic meltwater is surfacing than was previously known, modifying the climate, preventing sea ice from forming...
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