California Water Science Center


In this section you will find California Water Science Center news and events. If you are with a media outlet and are requesting information please contact:  Sally House, Science Communications, at (916) 698-0270.

Filter Total Items: 70
Date published: April 13, 2021

Bay-Delta Science Conference Goes Virtual

From April 6-9, 2021, more than 1,000 scientists, managers, and policymakers gathered virtually for the 11th Biennial Bay-Delta Science Conference.  This year’s conference "Building Resilience Through Diversity in Science" featured a plenary talk by California Water Science Center (CAWSC) Director Eric Reichard who is presently serving as Acting USGS Southwest Regional Director.

Date published: April 6, 2021

Nutrient Erosion Study Begins at California’s Clear Lake

Clear Lake, the largest natural lake entirely within California, has a severe problem with harmful algal blooms which can be detrimental to aquatic life by depriving it of oxygen when the algae dies, sinks, and decays. A driving factor of these conditions are the nutrient loads being carried into the lake by soil erosion and the transport of sediment from the lake’s tributaries. 

Date published: February 17, 2021

Scientists Study Longfin Smelt Distribution in the Coastal Pacific Ocean

USGS scientists have begun a project to estimate the marine distribution of longfin smelt (Spirinchus thaleichthys) along the North American Pacific coast.

Date published: February 16, 2021

Public Webinar on the USGS study results for  Groundwater Quality of Aquifers Overlying the Oxnard Oil Field, Ventura County, California

The USGS and State Water Board Oil and Gas Regional Groundwater Monitoring Program are hosting a webinar Friday, February 19 at 10am PT to discuss the scientific findings of the Groundwater Quality of Aquifers Overlying the Oxnard Oil Field, Ventura County, California study.

Date published: January 29, 2021

Scientists Assess Sediment Nutrient Storage and Release in California's Sacramento-San Joaquin Delta

California Water Science Center scientists have begun the first comprehensive assessment of sediment nutrient inventories and fluxes in the Sacramento-San Joaquin Delta (Delta). Their findings will serve as a baseline for assessing water quality improvements following upcoming upgrades to the Sacramento Regional Wastewater Treatment Plant and wetland restoration efforts.

Date published: January 21, 2021

California Water Science Center Launches Quarterly Newsletter

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Date published: December 17, 2020

Ecosystem Engineering Impacts of Water Primrose in the Sacramento-San Joaquin Delta

Many non-native fish, invertebrates, and plants have colonized the Delta over the past century. Included among these species is the water primrose (Ludwigia grandiflora ssp. hexapetala and Ludwigia peploides), an aggressive floating aquatic plant native to South and Central America and parts of the US, but invasive in California.

Date published: November 5, 2020

Scientists Study Selenium Hazard in the Salton Sea Environment

In the past decade, Salton Sea water elevation has declined due to drought, lining of canals, and changes to management of the Colorado River. This has resulted in the creation of new wetlands caused by drains and rivers no longer reaching the Salton Sea.

Date published: October 1, 2020

Invasive Mussel Species Impacts the Food Web in Lake Mead

In an article for the journal Science of the Total Environment, USGS scientists and others discuss the impact of invasive quagga mussels on the ecosystem of Lake Mead located on the border of Arizona and Nevada. 

Date published: September 18, 2020

How Changing Climate Will Impact the Flow of Sediment to the San Francisco Bay‐Delta

The health of the San Francisco Bay‐Delta depends on a sediment supply that has been recently declining due to sediment trapping in upstream reservoirs. Reduced sediment supply increases water clarity in the Bay-Delta, which in turn influences ecological processes and aquatic life.

Date published: September 1, 2020

Scientists Collect Water Quality Data Prior to Wastewater Treatment Plant Upgrades

The Sacramento Regional County Sanitation District (Regional San) is currently completing major upgrades to its wastewater treatment plant. In anticipation of these upgrades, USGS scientists are gathering data to establish baselines for current nutrient levels and dynamics in the Sacramento-San Joaquin Delta (Delta).