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Replenishing Groundwater in the San Joaquin Valley: 2024 Update

By Caitlin Peterson, Ellen Hanak, Zaira Joaquín Morales

How much progress has been made on groundwater recharge in the San Joaquin Valley since 2017? This report shares the details of our latest groundwater recharge survey, which we conducted in 2023.

Fact Sheet

Floods in California

By Jeffrey Mount, Gokce Sencan, Letitia Grenier

More than seven million Californians—one in five residents—live in areas at risk of flooding, and risks are growing. Improved land use planning, insurance, and innovative flood management can help.

Report

Priorities for California’s Water

By Jeffrey Mount, Letitia Grenier, Ellen Hanak, Caitlin Peterson ...

California has made great strides in preparing for a drier, hotter future, but it remains a challenge to harness the bounty of wet years while also reducing flood risk. How did California’s water sector manage the unusually wet 2023 water year—and what lessons can we glean for the future?

Report

Storing Water for the Environment

By Sarah Null, Jeffrey Mount, Brian Gray, Kristen Dybala ...

Large reservoirs are essential for managing water in California’s highly variable climate—but over the years, the construction and operation of these reservoirs have had significant environmental costs. Our new research outlines how reservoir operations could be changed to improve the health of the state’s fragile freshwater ecosystems.

blog post

Making End-of-Life Decisions on Aging Dams

By Lori Pottinger

Many of California’s large dams are outliving their functions and even becoming hazardous. We talked to Andrew Rypel of the UC Davis Center for Watershed Sciences about how to address this aging dam population.

blog post

Video: Making the Most of Water for the Environment

By Lori Pottinger

Ted Grantham—the first PPIC CalTrout Ecosystem Fellow and a cooperative extension specialist at UC Berkeley—and a panel of experts discuss a new approach to river management that would restore seasonal components of river flow to sustain ecosystem health.

Fact Sheet

Climate Change and California’s Water

By Jeffrey Mount, Daniel Swain, Paul Ullrich

Managing water is at the forefront of climate change adaptation in California. Changes are needed to prepare the water system for a more volatile climate.

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