Images

USGS scientist, Katy O'Donnell, monitoring instruments onboard a high-speed mapping boat. 

Hydrologic technicians deploying a flow sensor on a shoal in San Francisco Bay.

Scientists heading out to deploy sensors for sediment nutrient storage and release.

Delta wetland near Rio Vista, California.

A concrete-lined stretch of the Los Angeles River that runs near Sepulveda Dam.  USGS streamgage 11092450 can be seen in the lower left along the river wall. Restoration is planned for this stretch of the river that runs through the San Fernando Valley.

Irrigated land-use in the Adelaida Area of San Luis Obisbo County, CA for 1984, 1996, 2004, 2014, and 2016. Numbers indicate acres and percent of total acres.

EnviSense data-logger/transmitter developed by Carnegie Mellon University actively deployed with stage sensor at USGS streamgage at Beale Air Force Base near Marysville, California.     

Channel in Sacramento-San Joaquin Delta with lots of vegetation and clouds and blue sky.

Solar-powered LoRa cellular gateway installed at Pepperwood Preserve to support water and soil moisture sensor deployments in the Santa Rosa, California area

Trace 1310 GC with a TSQ 9000 triple quadrupole MS (Thermo Scientific)

Scientists Collect Water Quality Data Prior to Wastewater Treatment Plant Upgrades

USGS Scientists Map Nutrients on Sacramento Delta

One-Water Hydrologic Flow Model: A MODFLOW Based Conjunctive-Use Simulation Software (Boyce and others, 2020).

Diagram the MODFLOW-2005 framework and its descendants (Boyce and others, 2020) 

Diagram showing that water flow and use is interconnected through physically-based processes and management processes.

Land use change in the Anza Valley, CA from 1934 to 2005.  

The USGS California Basin Characterization Model (BCM) was used to understand the rate and amounts of natural groundwater recharge in the Indian Wells Valley and to refine historical estimates of groundwater recharge in the valley.

Photo of stream in urban environment with green lawn beside it. Photo credit: Alan Cressler USGS

USGS Research Scientist Ellen Goodrich-Stuart adjusts a CH4 (Methane) analyzer mounted on the eddy covariance flux tower at the Rush Ranch site at Suisun Marsh. 

Locations of the July 2019 earthquake epicenters and six USGS groundwater-monitoring sites.

Hydrologist Brian Bergamaschi is seen through the USGS California Water Science Center Biogeochemistry Group's underwater water quality mapping manifold.