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Filter Total Items: 359
Lower San Joaquin River
Date Published: December 29, 2016
Status: Completed

Ground-Water Nitrate and Organic Carbon Inputs to the Lower San Joaquin River

This proposal addresses drinking water and aquatic habitat issues associated with nitrate and organic carbon in the lower San Joaquin River (SJR).

Map of Trinity River Watershed.
Date Published: December 29, 2016
Status: Completed

Assessing system-wide riverine geomorphic change in support of science-based restoration on the mainstem Trinity River, northern California

Historic landuse, dam construction, water storage and flow diversion within the Trinity River watershed resulted in downstream geomorphic changes that simplified the river planform and lead to dramatic losses of salmonid habitat and significant population declines. The Trinity River Restoration Program (TRRP) requested the USGS complete an assessment of geomorphic change that could be used to...

An infographic summarizing activities of the RAMPS program.
Date Published: December 9, 2016
Status: Active

RAMPS: Restoration Assessment & Monitoring Program for the Southwest

The Restoration Assessment and Monitoring Program for the Southwest (RAMPS) seeks to assist U.S. Department of the Interior (DOI) and other land management agencies in developing successful techniques for improving land condition in dryland ecosystems of the southwestern United States. Invasion by non-native species, wildfire, drought, and other disturbances are growing...

Vegetation along the Colorado River in the Grand Canyon
Date Published: December 1, 2016
Status: Active

Riparian Ecology

Riparian ecologists in the AS Branch study interactions among flow, channel change, and vegetation along rivers across the western United States and worldwide. Our work focuses on issues relevant to the management of water and public lands, including dam operation, climate change, invasive species, and ecological restoration. Investigations take place on a range of scales. For example,...

Land elevation change in the northern San Joaquin Valley, CA
Date Published: November 3, 2016

California's Central Valley

Competition for water resources is growing throughout California, particularly in the Central Valley. Statewide population growth, anticipated reductions in Colorado River water deliveries, drought, and the ecological crisis in the Sacramento-San Joaquin Delta have created an intense demand for water. USGS Tools and information can be used to help manage the Central Valley aquifer system, an...

Attribution:
Image: USGS Documents 2015 Western U.S. Drought
Date Published: November 2, 2016

Western Drought Resilience Assessment

We collected streamflow, water temperature, and other data from more than 2,500 gaging stations on rivers and streams across California, Idaho, Nevada, Oregon, Utah, and Washington to document the severity of the 2015 drought. We are using the data collected to assess how warmer winter temperatures, reduced mountain snowpack, and a shift in precipitation from snow to rain may affect future...

A screenshot of the December 2015 WERC research update.
Date Published: October 28, 2016
Status: Active

WERC Newsletters

USGS Western Ecological Research Center newsletters ran from 2012 to early 2016. Explore the archives for exciting information on projects, events, and news interviews involving our scientists.

Screenshot of the USGS WERC handout.
Date Published: October 28, 2016
Status: Active

Research Handouts

USGS Western Ecological Research Center compiles one-page handouts on WERC scientists' projects involving high-profile topics like renewable energy, drought, climate change, and more. These handouts are perfect for conferences and meetings with partners and resource managers. 

An underwater photo of a kelp forest.
Date Published: October 24, 2016
Status: Active

Kelp Forest Community Ecology

The near shore waters along the coast of southern California host one of the most productive marine ecosystems on earth: giant kelp forests. These complex environments provide habitat, food, and hiding places for more than 1,000 species of plants and animals, but are easily disturbed by both natural events and human activities. Strong storms, fluctuating water temperatures, coastal development...

Contacts: Kevin Lafferty
A screenshot of the March 2016 newsletter from WERC.
Date Published: October 21, 2016

USGS WERC Ecology Research Update: March 2016

USGS Western Ecological Research Center newsletters are posted on our blog. Check back for a rundown of new research and events on ecology and wildlife science in California and Nevada. 

This photo of a Pacific sheath-tailed bat is the last good photo of this bat from Aguiguan in existence.
Date Published: August 1, 2016

Ecology of Insect-eating Bats

Bats are the only flying mammals that are active mostly at night and occur on all continents except Antarctica. Bats are ecologically diverse, with a range of species that specialize in feeding on fruit, nectar, blood, fish, small mammals, and insects. However, of the more than 1,100 known species of bats on Earth, the majority specialize in feeding on insects. In the United States for example...

a birder on a bridge looking at the birds
Date Published: July 26, 2016
Status: Active

HDgov: Multi-agency Website for Human Dimensions of Natural Resources

HDgov is an interactive and mobile-responsive online portal to interagency, academic, and non-government resources focused on the human dimensions of natural resource management. The web portal provides easy access to tools, publications, data, and methods that help ensure that the people side of natural resources is considered throughout the entire natural resource management process. The...

Filter Total Items: 315
USGS
January 1, 2016

Bathymetric data were collected by the U.S. Geological Survey (USGS) in 2015 for Little Holland Tract in the Sacramento-San Joaquin River Delta, California. The data were collected using a personal watercraft (PWC) platform that consisted of Trimble R7 Global Navigation Satellite System (GNSS) receivers with Zephyr 2 antennas, combined with Odom Echotrac CV-100 single-beam echosounders and 200 kH

USGS
January 1, 2016

This dataset includes swell-filtered, high-resolution seismic-reflection data jointly collected by the U.S. Geological Survey (USGS) and Oregon State University in 2010, between Shelter Cove and Fort Bragg in northern California.

USGS
January 1, 2016

This dataset includes raw, high-resolution seismic-reflection data jointly collected by the U.S. Geological Survey (USGS) and Oregon State University in 2010, between Fort Bragg and Point Arena in northern California.

USGS
January 1, 2015

This Data Release contains GIS data generated by USGS for use in a BOEM funded project to compare natural rockfish nursery habitat to habitat created by manmade structures in the eastern Santa Barbara Channel. The contours were created from published Data Elevation Models of Carignan and others (2009) and Dartnell and others (2012). Contours were generated using the ESRI Contour tool in spatial a

Water-supply basins in California that drain to the SF Bay Delta
February 26, 2014

Soil water deficit was calculated from soil moisture storage simulated for Jan. 1, 2014 for 23 water-supply basins surrounding the California Central Valley that drain to the Bay-Delta by using the monthly California Basin Characterization Model and ArcGIS. 

Icon made to look like a zipper on piece of paper is being unzipped, with the word ZIP at the bottom of the paper.
January 1, 2014

ZIP file (3.6 MB) contains three files when uncompressed: 

  • an essential readme.txt file and
  • model projections of two Southern California flooding hazard scenarios:
     - ARkStorm, and
     - January 2010 El Niño and Sea-Level Rise.

For more information, see CoSMoS 1.0: Southern California

 Screen Shot of the Land Treatment Digital Library Home Page
November 23, 2013

The Land Treatment Digital Library (LTDL) was created by the USGS to catalog legacy land treatment information on Bureau of Land Management lands in the western United States. The LTDL can be used by federal managers and scientists for compiling information for data-calls, producing maps, generating reports, and conducting analyses at varying spatial and temporal scales.

Animation shows map of land and sea, land doesn't change and the ocean and bay change colors according to tidal height.
October 2, 2013

This web page provides a link to files that may be used to run a basic depth-averaged (2DH) Deltares Delft3D version 4.00.01 astronomic tide model for San Francisco Bay. These files are provided ‘as is’ with the aim of promoting scientific advancement in the understanding of San Francisco Bay processes.

Land Treatment Digital Library version 6, application splash screen
July 24, 2013

This software allows agencies, organizations, and individuals to download an empty, stand-alone Land Treatment Digital Library database to individual or networked computers. Data entered in these databases may be submitted to the USGS for possible inclusion in the online Land Treatment Digital Library (https://ltdl.wr.usgs.gov).

Screen shot of the NSDI node for SIR 2010-5193
September 20, 2011

This dataset was created in support of a USGS study focusing on groundwater resources in the Great Basin carbonate and alluvial aquifer system (GBCAAS). The GBCAAS is a complex aquifer system comprised of both unconsolidated and bedrock formations covering an area of approximately 110,000 square miles. The aquifer system is situated in the eastern portion of the Great Basin Province.

Screen shot of the NSDI node for SIR 2010-5193
September 20, 2011

This dataset consists of potentiometric contours, control points used to guide the creation of the contours, and a grid of 2 square-mile cells used to average the water-level value of selected control points. Control points are based on water-level measurements at well and spring locations from the USGS National Water Information System (NWIS).

Screen shot of NSDI node for SIR 2010-5193
September 20, 2011

This dataset was created in support of a study focusing on groundwater resources in the Great Basin carbonate and alluvial aquifer system (GBCAAS). The GBCAAS is a complex aquifer system comprised of both unconsolidated and bedrock formations covering an area of approximately 110,000 square miles. The aquifer system is situated in the eastern portion of the Great Basin Province of the western US.

Filter Total Items: 312
Publication Thumbnail
Year Published: 1984

A method for estimating ground-water return flow to the Colorado River in the Parker area, Arizona and California

Leake, S.A.
A method for estimating ground-water return flow to the Colorado River in the Parker area, Arizona and California; 1984; WRI; 84-4229; Leake, S. A.

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Year Published: 1984

Hydrochemical data for the Truckee River drainage system, California and Nevada

Benson, Larry V.
Hydrochemical data for the Truckee River drainage system, California and Nevada; 1984; OFR; 84-440; Benson, Larry V.

Publication Thumbnail
Year Published: 1983

A hydrochemical reconnaissance study of the Walker River basin, California and Nevada

During 1975 and 1976, a large number of water and sediment samples were collected from the Walker River Basin. Additional surface water samples were collected during 1980 and 1981. Data are given herein for chemical analyses of snowmelt, tributary, river, spring, well, lake, reservoir, lake sediment pore fluid, tufa, lake and river sediment...

Benson, L.V.; Spencer, R.J.
A hydrochemical reconnaissance study of the Walker River basin, California and Nevada; 1983; OFR; 83-740; Benson, L. V.; Spencer, R. J.

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Year Published: 1983

A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California

Loeltz, Omar J.; Leake, S.A.
A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California; 1983; WRI; 83-4220; Loeltz, O. J.; Leake, S. A.

Publication Thumbnail
Year Published: 1983

A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California; executive summary

Loeltz, Omar J.; Leake, S.A.
A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California; executive summary; 1983; WRI; 83-4221; Loeltz, O. J.; Leake, S. A.

Publication Thumbnail
Year Published: 1978

Historic Ground Failures in Northern California Triggered by Earthquakes

A major source of earthquake-related damage and casualties in northern California has been ground failures generated by the seismic shaking, including landslides, lateral spreads, ground settlement, and surface cracks. The historical record shows that, except for offshore shocks, the geographic area affected and the quantity and general severity...

Youd, T. Leslie; Hoose, Seena N.
Historic Ground Failures in Northern California Triggered by Earthquakes; 1978; PP; 993; Youd, T. Leslie; Hoose, Seena N.

Publication Thumbnail
Year Published: 1977

Combined Ice and Water Balances of Maclure Glacier, California, South Cascade Glacier, Washington, and Wolverine and Gulkana Glaciers, Alaska, 1967 Hydrologic Year

Combined ice and water balances were measured in the 1967 hydrologic year (October 1-September 30) on four glaciers in western North America ranging in latitude from 37 deg to 63 deg N. This hydrologic year was characterized by heavier than normal winter precipitation in California and Washington and abnormally dry winter conditions in coastal...

Tangborn, Wendell V.; Mayo, Lawrence R.; Scully, David R.; Krimmel, Robert M.
Combined Ice and Water Balances of Maclure Glacier, California, South Cascade Glacier, Washington, and Wolverine and Gulkana Glaciers, Alaska, 1967 Hydrologic Year; 1977; PP; 715-B; Tangborn, Wendell V.; Mayo, Lawrence R.; Scully, David R.; Krimmel, Robert M.

Publication Thumbnail
Year Published: 1975

Geohydrologic Reconnaissance of the Imperial Valley, California

Loeltz, Omar J.; Irelan, Burdge; Robison, J.H.; Olmsted, F.H.
Geohydrologic Reconnaissance of the Imperial Valley, California; 1975; PP; 486-K; USGS NUMBERED SERIES; Water Resources of Lower Colorado River-Salton Sea Area; Loeltz, O. J.; Irelan, Burdge; Robison, J. H.; Olmsted, F. H.

Publication Thumbnail
Year Published: 1973

Geohydrology of the Needles area, Arizona, California, and Nevada

Metzger, D.G.; Loeltz, Omar J.
Geohydrology of the Needles area, Arizona, California, and Nevada; 1973; PP; 486-J; USGS NUMBERED SERIES; Water resources of Lower Colorado River-Salton Sea area; Metzger, D. G.; Loeltz, O. J.

Publication Thumbnail
Year Published: 1973

Geohydrology of the Parker-Blythe-Cibola area, Arizona and California

Metzger, D.G.; Loeltz, Omar J.; Irelan, Burdge
Geohydrology of the Parker-Blythe-Cibola area, Arizona and California; 1973; PP; 486-G; USGS NUMBERED SERIES; Water resources of Lower Colorado River-Salton Sea area; Metzger, D. G.; Loeltz, O. J.; Irelan, Burdge

Publication Thumbnail
Year Published: 1973

Geohydrology of the Yuma area, Arizona and California

Olmsted, F.H.; Loeltz, Omar J.; Irelan, Burdge
Geohydrology of the Yuma area, Arizona and California; 1973; PP; 486-H; USGS NUMBERED SERIES; Water resources of Lower Colorado River-Salton Sea area; Olmsted, F. H.; Loeltz, O. J.; Irelan, Burdge

Publication Thumbnail
Year Published: 1970

Physiographic diagrams of parts of the continental borderlands of California and Alaska: 12 physiographic diagrams: Southern California Borderland; Eastern Murray Fracture Zone and Transverse Ranges; Southern Monterey Bay; Monterey Canyon; Central San

Alpha, Tau Rho
Physiographic diagrams of parts of the continental borderlands of California and Alaska: 12 physiographic diagrams: Southern California Borderland; Eastern Murray Fracture Zone and Transverse Ranges; Southern Monterey Bay; Monterey Canyon; Central San; 1970; OFR; 70-5; Alpha, Tau Rho

Filter Total Items: 1,143
With gloved hands and tweezers, folding a water filter
May 12, 2017

A hydrologist carefully folds a filter used to collect an eDNA sample

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a hydrologist carefully folds a filter used to collect a sample for analysis of eDNA.

Man standing ankle-deep in creek takes notes
May 12, 2017

A hydrologic technician records stream habitat characteristics

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a hydrologic technician records characteristics of the habitat of a highly urbanized stream.

A man walks knee-deep in stream next to outfall pipe
May 11, 2017

A geomorphologist walks a stream as part of an ecological survey

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a geolomorphologist assesses stream banks.

Distant view of the shore from a flat rooftop that is visible at bottom of image.
May 6, 2017

“Snapshot” or first frame of beach video, Santa Cruz, California

Snapshot, or first frame of from a 10-minute video taken May 6, 2017, in Santa Cruz, California. View is from atop a hotel looking down on Cowells Beach, a popular surf spot. Researchers at the USGS are using these and other video images to improve understanding and computer modeling of beach processes, especially those that change the coast. 

...
Distant view of the shore from a flat rooftop that is visible at bottom of image.
May 6, 2017

Time-averaged image from video of beach in Santa Cruz, California

Time-averaged image, or “timex,” created by averaging the intensity of light recorded at each spot, or “pixel,” during a 10-minute video taken at Santa Cruz, California, on May 6, 2017. Blurred white zones show where waves are breaking. Line between wet and dry sand shows the maximum height on the beach reached by the waves (“runup”). Researchers at the USGS are using

...
Image in mostly black and white tones, showing distant view of beach stretching from bottom left to upper right.
May 6, 2017

Variance image from video of beach in Santa Cruz, California

“Variance” image produced from video shot at Cowells Beach in Santa Cruz, California, on May 6, 2017. The more the light intensity changes at a given spot, or “pixel,” during the video, the brighter the value assigned to that pixel. Motion tends to produce changes in light intensity. Note bright areas along and beyond the shore where waves were breaking. Researchers are

...
An extremely rare Mojave River western pond turtle was recently observed in the Mojave Desert.
May 4, 2017

An extremely rare Mojave River western pond turtle

An extremely rare Mojave River western pond turtle was recently observed by USGS scientists and staff from The Living Desert Zoo and Gardens in the Mojave Desert. Turtles of this population have rarely been seen since the late 1990s.

Sacramento National Wildlife Refuge, CA
May 2, 2017

Sacramento National Wildlife Refuge, CA

Sacramento National Wildlife Refuge, CA

View from a boat of a man snorkeling in a marshy waterway with thick vegetation along the edge of and in the water.
April 5, 2017

Brazilian waterweed

Tips of Brazilian waterweed (Egeria densa) break the surface at low tide in Lindsey Slough in the northern Sacramento-San Joaquin River Delta. More commonly, this invasive plant is completely submerged.

March 31, 2017

Establishing Forster's Tern Nesting Colonies

Scientists from the USGS Western Ecological Research Center (WERC) are conducting a "social attraction" study for seabirds in the Don Edwards San Francisco Bay National Wildlife Refuge. Historically, this region offered wetland habitats to local wildlife. With the introduction of industrial salt ponds and human development, however, much of this habitat was lost. Now,

...
Satellite image showing wildflower blooming in California.
March 28, 2017

The Wildflower Superbloom in California from Landsat’s Perspective

After 5 years of drought, California finally got relief during the winter of 2016–2017 with much needed precipitation. One result of this additional moisture was a springtime abundance of wildflowers.

There were many places to see this wildflower “superbloom” in southern California. This pair of images from Landsat

...
California Wildflower Superbloom, Spring 2017, Landsat 8
March 28, 2017

California Wildflower Superbloom, Spring 2017, Landsat 8

After 5 years of drought, California finally got relief during the winter of 2016–2017 with much needed precipitation. One result of this additional moisture was a springtime abundance of wildflowers in 2017. This Landsat 8 image shows a large area of wildflower "superbloom" just north of Los Padres National Forest in southern California.

 

Filter Total Items: 906
USGS
July 11, 2013

Initial findings will support a USGS hydrologic model to better understand area water-supply issues
 

Carbon dioxide gas detection instrument installed at Horseshoe Lake...
July 2, 2013

Since 1990, high levels of carbon dioxide (CO2) in the soil have killed trees within about a 75-acre area adjacent to Horseshoe Lake on the south side of Mammoth Mountain.

USGS
June 27, 2013

When it comes to weekend activities, many people make the tough choice between recreation and spending their time volunteering.  But recently, The Nature Conservancy and the U.S. Geological Survey (USGS) gave a group of local anglers a chance to do both at once.  

Plots of earthquakes over time in Long Valley, CA. Top is number o...
June 18, 2013

In the late afternoon of 17 June 2013 a flurry of earthquakes started in the Long Valley Caldera east of the town of Mammoth Lakes, California (in an area known to geologists as the south moat).

USGS
May 28, 2013

North America's largest vulture, the California condor, once graced the skies of the Pacific Northwest from northern California to British Columbia and was deeply woven into the fabric of many Native American cultures. A new book by two federal scientists documents the condors history in the region, from prehistoric times to the early 20th century.

USGS
May 23, 2013

Urban Seismic Studies to Begin in East San Francisco Bay Area — About 30 seismic sensors are seeking a place to hang out for up to three years in the greater Pleasanton/Dublin/San Ramon, Calif., area. 

USGS
April 3, 2013

New scientific findings published in Ecology reveal that interactions of climate, soils, shrubs, and a natural nitrogen fertilization process affect regrowth of forests following wildfire in southern Oregon and northern California. Managers can use this information to consider post-fire management practices, including fertilization and shrub-removal.

USGS
March 29, 2013

Barium and nitrate were detected at high concentrations in 5 percent of untreated groundwater used for public-water supply in the San Francisco Bay region, while human-made organic chemical constituents were found at high concentrations in less than 1 percent. 

USGS
March 25, 2013

Two years after the Tohoku earthquake and tsunami devastated Japan and caused millions of dollars in damage to California coastal communities, the state's Emergency Management Agency and the California Geological Survey continue to work with their local, state and federal partners to reduce the impacts of future tsunamis in California. 

USGS
March 13, 2013

Climate factors such as snowpack and precipitation are playing an increasingly important role in the abundance of American pikas in the Great Basin, according to a continuing ecological study by the U.S. Geological Survey, University of Montana and Montana State University.

USGS
March 13, 2013

The U.S. Geological Survey is cancelling its March 28th Evening Public Lecture "Preparing for California Climate Change," due to travel restrictions the agency has implemented because of the federal budget sequestration.

USGS
March 12, 2013

February 2013 marked the first year of successful volcano monitoring and preparing for possible volcanic eruption for the California Volcano Observatory (CalVO).