Images

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

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

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

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

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.

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.

Organic Matter Research Lab

Horiba Aqaulog - simultaneously measures absorbance spectra and fluorescence

TOC-L Laboratory Total Organic Carbon Analyzer

Cary 300 Spectrophotometer

Carbon Lab

Laminar Flow hood in Carbon Lab

Horiba Aqaulog - simultaneously measures absorbance spectra and fluorescence Excitation-Emission Matrices

Trace Metals Lab

Trace Metals Lab fume hood

Locations of the July 2019 Ridgecrest, CA earthquake epicenters and five USGS groundwater-monitoring sites with corresponding hydrographs. Effects from the two earthquakes were observed in several USGS continuous groundwater-level monitoring sites in California, Nevada, and Arizona.