Images

A drone view of where scientists with the U.S. Geological Survey gathered shellfish samples collected at Martinez Harbor, Contra Costa County.

Zoë Siman-Tov (left) and Amelia Ayers, both with the U.S. Geological Survey, gather shellfish samples collected at Martinez Harbor, Contra Costa County, CA. The shrimp are tested for levels of toxins found in Harmful Algal Blooms (HABs).

A drone view of where scientists with the U.S. Geological Survey gathered shellfish samples collected at Martinez Harbor, Contra Costa County.

This picture shows the Mojave River in southern California during a high flow stage.

Shows all dams removed having been removed. Removal of the four hydroelectric dams is the first crucial step to restore the health of the Klamath River and the communities that depend upon it. Work now continues to restore the 2,200 acres of formerly submerged lands. Restoration crews will be onsite until vegetation success meets predetermined performance metrics.

USGS booth at 2025 Tahoe Summit. Pictured from left, Sara Doyle (NV WSC), Zach Hood (NV WSC), David Smith (NV WSC), Ed Parvin (CAWSC) and Mark Dickman (CAWSC). Photograph by Ramon Naranjo (NV WSC) on 8/6/25.

A field in California's Central Valley. This is being used to represent the Central Valley Hydrologic Model, version 2.

Crown gathered at 2025 Tahoe Summit. The Lake Tahoe Summit is an annual event that brings local, federal, and state leaders together to discuss ways to protect Lake Tahoe and strengthen the partnership underlying the Lake Tahoe Environmental Improvement Program. 

Klamath River Basin straddles northern California and southern Oregon. The Klamath River empties into the Pacific Ocean just below the Oregon/California border.

Water availability in the Klamath Basin is shaped by three interconnected factors, like overlapping circles in a Venn diagram. First, upper basin controls—such as groundwater, snowpack, and runoff—determine how much water is available. Second, biological opinions set flow requirements to protect endangered fish and habitats, including flushing and geomorphic flows.

This is a screenshot showing the hydrology for Lake Earl WA inside the CDFW climate hydrology explorer web tool.

Artichoke field in the Salinas River Valley. California’s Salinas Valley is one of the most productive agricultural basins in the world due to the fertile valley soil, temperate climate, and availability of water for irrigation. 

Lettuce field in the Salinas River Valley. California’s Salinas Valley is one of the most productive agricultural basins in the world due to the fertile valley soil, temperate climate, and availability of water for irrigation.

CAWSC Biogeochemistry group at 2025 IEP Workshop. Left to Right: Back Row - Maura Uebner, Keith Bouma-Gregson, Kyle Leathers; Middle Row - Crystal Sturgeon, Zoё Siman-Tov, Lane Bratz, Emily Richardson, Tamara Kraus, Alex Ryan; Front Row - Nick Framsted 

The photo shows members of the research team. From left to right: Tevin Bui (RCD), Jordan Buxton (USGS), Brett Mills (RCD), Alicia Ruan (RCD), and Brock Huntsman (USGS). Inset at right are Marissa Wulff (top) and Jeff Gronemyer (bottom), both of the USGS. 

The above photos show raceways at the Riverside Corona Resource Conservation District (RCD) facility.

CAWSC poster presenters at 2025 IEP Workshop. Clockwise from upper left: Anna Conlen, Elise Shea, Lex Thomas, Zoё Siman-Tov, Bryan Gopez, Emma Walker, David Hart, Maura Uebner, Lawrence Fujiwara, Trevor Violette.

The photo shows (left) the raft outfitted with the PIT tag reader and two cameras, both facing down into the river. And (right) a PIT tag attached to a lure.

Santa Ana Sucker (Pantosteus santaanae) being measured in PIT tag study done in the late summer and early fall of 2024.

This photo shows a passive integrated transponder (PIT) tag reader being used to test a tagged Santa Ana Sucker.

Example of Santa Ana Sucker (Pantosteus santaanae) lure with a PIT tag attached.