California Water Science Center

Measuring and Monitoring

Basic hydrologic data collection, processing, analysis, dissemination, and archiving are major parts of the California Water Science Center program. Streamflow data, for example, are used for flood and water-supply forecasts, planning and design, river regulation, streamflow statistics, and research investigations. Much of the data are available on a near-real-time basis by satellite telemetry.

Filter Total Items: 139
Date published: November 26, 2018
Status: Completed

Geohydrology of the Big Bear Valley

The study develops a greater understanding of the hydrology of the Big Bear Valley ground-water basin and allows the Big Bear Valley Community Services District to better manage and utilize the resource. The study will address the effects of urbanization and suburbanization on water resources and the effects of climate on water resources, issues 1 and 7 from the Strategic Directions for the...

Date published: November 26, 2018
Status: Completed

Central Basin Groundwater Contamination Study

The Central and West Coast groundwater basins provide nearly a third of the water supply to 43 cities in southern Los Angeles County. Over 250,000 afy are pumped from the basins for municipal and industrial use. To properly manage the ground-water resource and to ensure its future availability, it is necessary to identify and manage threats to the drinking water aquifers from surface...

Contacts: Michael T Land
Date published: November 26, 2018
Status: Completed

Development of Precipitation-Runoff Modeling System (PRMS) for the Yuba River Basin, Northeastern California, with application for streamflow predictability and flood forecasting

Reservoirs in the Yuba River Basin are operated by the US Army Corps of Engineers (USACE) as part of the Feather-Yuba Forecast Coordinated Operations Program, and play an important role in flood management, water quality, and the health of fisheries as far downstream as the Sacramento-San Joaquin Delta. The basin has been developed for hydropower and irrigation diversions, so that measured...

Contacts: Kathryn Koczot
Date published: November 19, 2018
Status: Completed

Enterococcus Surface Protein as an Indicator of Human Fecal Pollution in the Lower Russian River Basin

Preliminary evaluation of water-quality data collected in the Lower Russian River Basin, Sonoma County, California during an on-going program by the U.S. Geological Survey (USGS), in cooperation with Sonoma County Water Agency (SCWA), indicated that there is considerable variability in bacterial concentrations from reach to reach and from year to year. Furthermore, tributaries that maintained...

Contacts: Robert Anders
Date published: November 19, 2018
Status: Completed

Simulation of Water Resources Management in the Pajaro Valley

Two key hydrologic issues in all coastal aquifer systems are the delineation and the management of the renewable water resources. The proper development and management of the renewable resources helps to minimize ground-water mining of the lower aquifer systems, and minimizes overdraft and seawater intrusion of the upper aquifer system while maximizing the sustainable yield of the renewable...

Date published: November 19, 2018
Status: Active

California Oil, Gas, and Groundwater (COGG) Program

The USGS California Water Science Center is working in partnership with state and federal agencies to answer the following questions about oil and gas development and groundwater resources:

Date published: November 16, 2018
Status: Completed

Water-Quality Inventory Pesticides in the Golden Gate National Recreation Area

In 1998, all urban creeks in the San Francisco Bay Area were added to the Clean Water Act Section 303d list due to known or suspected diazinon impairment. Diazinon is an organophosphorus insecticide used on lawns, and fruit and vegetables. This pesticide has since been "phased out" and has not been available for purchase since late 2004. Diazinon use is declining and is being replaced by other...

Date published: November 15, 2018
Status: Active

Variability of Salinity and Temperature In San Francisco Bay

The USGS has been collecting specific conductance (salinity) and water temperature data in San Francisco Bay (SF Bay) since 1990. Data are typically collected at 5-10 fixed locations throughout the bay, every fifteen minutes, every minute of the day.

Date published: November 15, 2018
Status: Active

High-Speed Mapping of Nutrient Distributions and Water Quality Survey - Lower South San Francisco Bay

This project aims to characterize spatial heterogeneity for key water quality parameters, and pilot the use of underway-flowthrough mapping of biogeochemical properties as a cost-effective approach to monitoring. 

Date published: November 15, 2018
Status: Active

Delta Regional Monitoring Program: Current-use Pesticides

This study will utilize the unique analytical capabilities of the USGS Pesticide Fate Research Group (PFRG), Organic Chemistry Research Laboratory (OCRL) to assess the occurrence of a large suite of understudied, current-use pesticides and pesticide degradates in surface waters entering the Sacramento/San Joaquin Delta. 

Contacts: James Orlando
Date published: November 15, 2018
Status: Completed

Assessment of Baseline Conditions in Liberty Cut

Monitoring habitat quality in the San Francisco Estuary (SFE) and Sacramento-San Joaquin Delta has been limited to mostly monthly discrete measurements of biologically relevant parameters (e.g. phytoplankton, dissolved organic matter (DOM), nutrients) that cannot fully characterize the physical and biogeochemical variability.

Contacts: Bryan Downing
Date published: November 15, 2018
Status: Completed

Optimal Groundwater Sustainability, Santa Barbara, California

Prior to 1997, local surface water and groundwater supplied all of the water supply for the city of Santa Barbara (about 120 miles northwest of Los Angeles). Excess pumping of groundwater during times of drought resulted in saltwater intrusion in Storage Unit I of the Santa Barbara groundwater basin. 

Contacts: Tracy Nishikawa