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: 61
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). 

Date published: August 25, 2020

USGS Participation in Annual Lake Tahoe Summit

The USGS Nevada and California Water Science Centers participate in annual Lake Tahoe Summit

Date published: July 7, 2020

Scientists Launch Two-Pronged Approach to Map Cyanotoxins in Bay-Delta

Over the last few decades the Sacramento-San Joaquin River Delta has experienced declines in phytoplankton productivity and a shift in species composition resulting in observed increases in harmful algal blooms (HABs).

Date published: June 17, 2020

Study to Commence on the Effects of Wildfires and Fire Retardants in California Watersheds

California Water Science Center Research Chemist Dr. Charles Alpers will commence a study on assessing the effects of wildfire and fire retardants on nutrient transport in California watersheds.

Date published: May 12, 2020

USGS Responds to Spring Flooding

U.S. Geological Survey field crews are measuring flooding across the country as spring weather is in full swing. Warming temperatures, increased precipitation and snowmelt have caused moderate to major flooding in the upper Midwest, East Coast, Central Plains and the Southeast portions of the country.

Date published: April 22, 2020

Modeling Water Supply and Demand in the Transboundary Rio Grande to Support Long Term Management Strategies

Changes in population, agricultural practices, and climate are increasing demands on available water resources, particularly groundwater, in the southwest.

Date published: April 1, 2020

California Groundwater Wells Receive Grades for Improvement and Degradation

In California, groundwater is a major source for drinking and other uses. Identifying where groundwater quality is getting better or worse is essential for managing groundwater resources.

Date published: March 3, 2020

Toxic Mineral Selenium Found in California Fish Species

Spinal deformities in California native fish species, the Sacramento Splittail, were first seen in the Sacramento-San Joaquin Delta in 2011. It is now known that this is due to exposure to the chemical element selenium. 

Date published: January 23, 2020

USGS Scientists Use Sound and Light to Measure Sediment in Water

In two recent publications, California Water Science Center scientists discuss their research using acoustic and optic technology to measure the quantity and movement of sediment in rivers and reservoirs.

Date published: December 9, 2019

USGS Hydrologist Collaborates with Danish Scientists on Groundwater Research

Groundwater provides much of the world's drinking water. When a supply of groundwater becomes contaminated, determining the timing and source of the contamination is an obvious concern. But the answers aren’t always clear. Contaminants may have different sources, even in a single groundwater well.