Male Chinook Salmon. Photo: Barbara Rich / Getty Images.

SEI’s Water Evaluation And Planning (WEAP) system has been used for more than a decade to model the water demand and supply in the Santa Clara Valley Water District. Under this project, SEI added capabilities to WEAP to assess fish habitats and needs.

This included changing the model from monthly to daily and allowing for the assessment of habitat metrics — including depth, velocity and temperature — at 39 points of ecological interest.

The resulting model enabled the Water District to see how various regulatory actions would affect fish habitat, along with water supply for people, industry and agriculture. This will help the District meet California Environmental Quality Act requirements.