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Filter Total Items: 364
WERC Yosemite Field Station
Date Published: February 21, 2017
Status: Active

Yosemite-Oakhurst Field Station

The Yosemite-Oakhurst Field Station is comprised of a main office located on the west side of the Sierra Nevada. 

Contacts: Matthew Brooks
USGS
Date Published: February 7, 2017
Status: Completed

San Bernardino Optimal Basin Management

The San Bernardino area of southern California has complex water-management issues. As an aid to local water managers, this report provides an integrated analysis of the surface-water and ground-water systems, documents ground-water flow and constrained optimization models, and provides seven examples using the models to better understand and manage water resources of the area. As an aid to...

Contacts: Wesley Danskin
Dead and dying cottonwoods along the Mojave River, California, following a decrease in the riparian water table
Date Published: January 17, 2017

Ecological Drought in Riparian Ecosystems

Drought is killing riparian trees along many rivers in the western United States. The cause can be increasing temperature or decreasing precipitation, flow or water-table elevation. At multiple locations we are relating water availability to physiological measurements of tree survival and water stress, such as ring width, carbon stable isotope ratio and branch hydraulic conductivity. These...

USGS
Date Published: December 29, 2016
Status: Completed

Injection, storage, and extraction of water, Roseville, California

The purpose of this study is evaluate how vertical variations in aquifer properties and well hydraulics may affect the injection, storage, and extraction of water and the transport of associated disinfection by-products in the Mehrten Formation underlying the City of Roseville.

USGS
Date Published: December 29, 2016
Status: Completed

Whiskeytown Aquatic Inventory Assessment

The project focuses on the assessment of aquatic biology, habitat, and water quality conditions of the major WHIS watersheds

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.

Filter Total Items: 354
USGS
January 1, 2017

As part of the San Francisco Bay Marsh Sediment Experiments and hydrodynamic investigations in San Pablo Bay and China Camp Marsh, California, vegetation sampling measurements were taken over several periods at numerous locations. This portion of the data release presents physical characteristics and percent cover data from vegetation plots sampled in China Camp State Park salt marsh (north

USGS
January 1, 2017

This part of DS 781 presents 2-m-resolution data for the acoustic-backscatter map of the Offshore of Point Conception Map Area, California. The GeoTiff is included in "Backscatter_OffshorePointConception.zip," which is accessible from https://doi.org/10.5066/F7QN64XQ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Cochrane, G.R., Har

USGS
January 1, 2017

Files contain hydrodynamic and sediment transport data for the location and deployment indicated. Time-series data of water depth, velocity, turbidity, and temperature were collected in San Pablo Bay and China Camp Marsh as part of the San Francisco Bay Marsh Sediment Experiments. Several instruments were deployed in tidal creek, marsh, mudflat, and Bay locations, gathering data on

USGS
January 1, 2017

Model-derived total water levels (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Souther

USGS
January 1, 2017

Files contain hydrodynamic and sediment transport data for the location and deployment indicated. Time-series data of water depth, velocity, turbidity, and temperature were collected in San Pablo Bay and China Camp Marsh as part of the San Francisco Bay Marsh Sediment Experiments. Several instruments were deployed in tidal creek, marsh, mudflat, and Bay locations, gathering data on

USGS
January 1, 2017

Model-derived significant wave height (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for So

Map of elevation and water depth shows channels and other features of a marsh, plus dots for instrument locations.
December 21, 2016

Investigate the influence of wind waves on sediment dynamics in two flooded agricultural tracts. Part of a large interdisciplinary study led by the USGS and funded by the U.S. Bureau of Reclamation to investigate how shallow-water habitats in the Sacramento-San Joaquin Delta function and whether they provide good habitat for native fish species, including the Delta smelt.

USGS
October 20, 2016

Abstract: This data release presents modeled time series of nearshore waves along the southern California coast, from Point Conception to the Mexican border, hindcasted for 1980-2010 and projected using global climate model forcing for 1975-2005 and 2012-2100.
Details: As part of the Coastal Storm Modeling System (CoSMoS), time series of hindcast, historical, and 21st-century

Map shows land and bay with labels, in the water are lines that show ship's path as it collected data.
August 30, 2016

This data release includes chirp seismic-reflection data collected in 2014 aboard the USGS R/V Snavely in San Pablo Bay, part of northern San Francisco Bay. The data were collected as part of USGS efforts to better understand the fault geometry of the Hayward and Rodgers Creek faults beneath the bay.

Photograph and line drawings that show a long sediment core and its various attributes with graphs and plots.
August 15, 2016

The five files included in this U.S. Geological Survey data release are data from a set of sediment cores acquired from the continental slope, north of Monterey Canyon, offshore central California.

USGS
August 4, 2016

These data are part of a larger USGS project to develop an updated geospatial database of mines, mineral deposits and mineral regions in the United States. Mine and prospect-related symbols, such as those used to represent prospect pits, mines, adits, dumps, tailings, etc., hereafter referred to as “mine” symbols or features, are currently being digitized on a st

Map shows where data has been collected in the ocean along the coast of California.
June 6, 2016

This data release includes marine geophysical data collected on three research cruises conducted in 2010 and 2012 between Point Arena and Cape Mendocino. The overall goal of this research is to better understandthe northernmost section of the San Andreas Fault (SAF).

Filter Total Items: 319
Publication Thumbnail
Year Published: 1988

Preliminary paleolimnologic data for the Walker Lake subbasin, California and Nevada

Benson, Larry V.
Preliminary paleolimnologic data for the Walker Lake subbasin, California and Nevada; 1988; WRI; 87-4258; Benson, Larry V.

Publication Thumbnail
Year Published: 1987

Comparison of estimates of evapotranspiration and consumptive use in Palo Verde Valley, California

Estimates of evapotranspiration and consumptive use by vegetation in Palo Verde Valley, California, were compared for calendar years 1981 to 1984. Vegetation types were classified, and the areas covered by each type were computed from Landsat satellite digital-image analysis. Evapotranspiration was calculated by multiplying the area of each...

Raymond, Lee H.; Owen-Joyce, Sandra J.
Comparison of estimates of evapotranspiration and consumptive use in Palo Verde Valley, California; 1987; WRI; 87-4071; Raymond, Lee H.; Owen-Joyce, Sandra J.

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Year Published: 1987

Estimates of consumptive use and ground-water return flow using water budgets in Palo Verde Valley, California

Palo Verde Valley, California, is an agricultural area in the flood plain of the Colorado River where irrigation water is diverted from the river and groundwater is discharged to a network of drainage ditches and (or) the river. Consumptive use by vegetation and groundwater return flow were calculated using water budgets. Consumptive use by...

Owen-Joyce, Sandra J.; Kimsey, Steven L.
Estimates of consumptive use and ground-water return flow using water budgets in Palo Verde Valley, California; 1987; WRI; 87-4070; Owen-Joyce, Sandra J.; Kimsey, Steven L.

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Year Published: 1986

Evapotranspiration estimates using remote-sensing data, Parker and Palo Verde valleys, Arizona and California

In 1981 the U.S. Geological Survey established an experimental project to assess the possible and practical use of remote sensing data to estimate evapotranspiration as an approximation of consumptive use in the lower Colorado River flood plain. The project area was in Parker Valley, Arizona. The approach selected was to measure the areas covered...

Raymond, L.H.; Rezin, K.V.
Evapotranspiration estimates using remote-sensing data, Parker and Palo Verde valleys, Arizona and California; 1986; OFR; 86-67; Raymond, L. H.; Rezin, K. V.

Publication Thumbnail
Year Published: 1986

Reconnaissance bathymetry of basins occupied by Pleistocene Lake Lahontan, Nevada and California

No abstract available. 

Benson, Larry V.; Mifflin, Martin D.
Reconnaissance bathymetry of basins occupied by Pleistocene Lake Lahontan, Nevada and California; 1986; WRI; 85-4262; Benson, Larry V.; Mifflin, Martin D.

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Year Published: 1986

Water-use information for California

This pamphlet reports on the availability of water use information to and for the state of California, through the development of the State Water-Use Data System (SWUDS). SWUDS is currently organized into 12 water use categories: Agricultural non-irrigation; Commercial; Domestic; Industrial; Irrigation; Mining; Power generation--fossil fuel,...

Templin, W.E.
Water-use information for California; 1986; OFR; 86-483; Templin, W. E.

Publication Thumbnail
Year Published: 1984

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

Owen-Joyce, Sandra J.
A method for estimating ground-water return flow to the Colorado River in the Palo Verde-Cibola area, California and Arizona; 1984; WRI; 84-4236; Owen-Joyce, Sandra J.

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.

Publication Thumbnail
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.

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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.

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

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.

Filter Total Items: 1,161
USGS employee building a decoy waterfowl nest for outreach demonstration.
July 11, 2017

WERC Scientist Building Decoy Waterfowl Nest 2

Taken 7/11/2017 at Grizzly Ranch, Suisun City, CA. USGS biological science technician Breanne Cooney builds a decoy waterfowl nest for an outreach demonstration.

USGS employee showing kids how to measure vegetation around waterfowl nests.
July 11, 2017

Kids Learning to Measure Vegetation with WERC Scientist

Taken 7/11/2017 at Grizzly Ranch, Suisun City, CA. USGS biological science technician Breanne Cooney shows kids how to measure the vegetation surrounding waterfowl nests. Density and height of vegetation can influence the survival of waterfowl eggs and chicks and affect their risk of falling prey to ravens, skunks, and other predators.

Preliminary seafloor bathymetry (in rainbow colors) collected by the USGS research vessel Parke Snavely on July 11, 2017
July 11, 2017

Preliminary seafloor bathymetry collected by the USGS on July 11, 2017

Preliminary seafloor bathymetry (in rainbow colors) collected by the USGS research vessel Parke Snavely on July 11, 2017. Relative depths shown in color, superimposed on a shaded-relief map from the June 26 USGS air-photo survey. Note white data gap next to the shore where water was too shallow for the Snavely to map. Shawn Harrison hopes

...
Aerial photograph looking from an airplane down on the Big Sur Landslide in California.
July 7, 2017

Big Sur Landslide, July 7, 2017

USGS scientists continue to monitor the slide by collecting imagery every couple of weeks, weather permitting. Pilot Bob Van Wagenen, contracted through the Department of the Interior’s Office of Aviation Services, takes air photos for Jon Warrick’s Big Sur Landslide team, flying out of the Watsonville Municipal Airport in a Cessna 182R. He uses a camera-plus-GPS system

...
USGS Scientist sampling soil gasses from a grassy hilltop on Santa Rosa Island, CA, with fog draping coast in background.
July 6, 2017

Sampling soil carbon dioxide on Santa Rosa Island

USGS Scientist sampling soil gasses from a grassy hilltop soil on Santa Rosa Island, Channel Islands National Park, California. The composition of soil gasses is indicative of the number and variety of microorganisms in the soil and what type of material they are digesting. Santa Rosa Island was heavily impacted by grazing animals and learning about soil microorganisms

...
June 22, 2017

PubTalk 6/2017 — Effects of Climate Change: A Scientific Path Forward

Title: The Effects of Climate Change: A Scientific Pathway Forward

  • The frequency of extreme and unpredictable weather events is increasing.
  • What are the effects of an increase or decrease in carbon emissions?
  • What is scientific research projecting for the future of climate change?
3D maps created by computer processing of air photos show what the Mud Creek area looked like before and after the landslide
May 27, 2017

3D maps of air photos show views from before and after the landslide

Topographic “point clouds” (or 3D maps) created by computer processing of air photos show what the Mud Creek area looked like on March 8, 2017 (top), May 19 (center), and May 27 (bottom).

Big Sur Landslide fly around animation
May 27, 2017

Big Sur Landslide fly around

Big Sur Landslide fly around from May 27, 2017, a preliminary computer animation. The slide created roughly 13 acres of new California land. 

May 25, 2017

PubTalk 5/2017 — Underwater secrets of the Hayward fault zone

Title: Underwater Secrets of the Hayward Fault Zone: Integrated 3D imaging to understand earthquake hazards 

  • Underwater imaging provides a unique opportunity to study urban fault hazards.
  • How do we link surface structures to depths where earthquakes occur?
  • How does "acoustic trenching" help us understand earthquake history?
View of a beach from up high on a roof with a pier, gentle waves, lots of people on the sand, amusement park in background.
May 18, 2017

Santa Cruz Main Beach

Still-image from video camera atop the Dream Inn looks eastward over Main Beach and boardwalk in Santa Cruz, CA.

Man in orange vest stands knee-deep in stream with a net
May 15, 2017

An ecologist uses a net to collect a sample of aquatic invertebrates

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, an ecologist uses a net to collect a sample of aquatic invertebrates for ennumeration and identification.

Filter Total Items: 912
Tsunami Messaging Image
September 5, 2013

The fearsome aftermath of a tsunami striking California might cost at least $3.4 billion to repair, but neither of the state's nuclear power plants would be damaged, suggests a new analysis that could help officials and the public prepare for a tsunami and reduce risks before any such disasters happen.

USGS
September 4, 2013

While scientists can't predict when a great earthquake producing a pan-Pacific tsunami will occur, thanks to new tools being developed by federal and state officials, scientists can now offer more accurate insight into the likely impacts when tsunamis occur. This knowledge can lead officials and the public to reduce the risk of the future tsunamis that will impact California.

USGS
August 20, 2013

A new interagency report provides a plan for long-term scientific monitoring and assessment for California's Salton Sea. Monitoring of the Salton Sea ecosystem is critical for informed decision making and the success of restoration efforts. 

USGS
August 13, 2013

When California State University, East Bay demolishes its seismically unsafe Warren Hall on Aug. 17 on its Hayward campus, the landmark building's implosion will produce energy similar to a small earthquake that can be used to study and map the nearby Hayward Fault. 

USGS
August 9, 2013

Science and technology have peeled back a veil of water just offshore of California, revealing the hidden seafloor in unprecedented detail. New imagery, specialized undersea maps, and a wealth of data from along the California coast are now available.

USGS
July 26, 2013

A study on frogs in remote Sierra Nevada mountain habitats including Yosemite National Park and Giant Sequoia National Monument, detected concentrations of pesticides in frog tissue that potentially came from California's Central Valley sources. 

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.