Unified Interior Regions

California

The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

Filter Total Items: 377
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...

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.

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. 

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
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. 

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...

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...

Date published: July 26, 2016
Status: Active

National Park Service Visitor Spending Effects

The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports a considerable amount of economic activity within park gateway communities. USGS economists collaborate with the National Park Service social science program to estimate NPS...

Date published: July 21, 2016

Using Quantile Regression to Investigate Ecological Limiting Factors

Unexplained heterogeneity in statistical models of animal responses to their physical environment is reasonable to expect because the measured habitat resources are a constraint on—but not the sole determinant of—abundance, survival, fecundity, or fitness. The ecological understanding and reliability of management predictions based on animal habitat models can be improved by shifting focus ...

Date published: July 21, 2016
Status: Active

North American Waterfowl Management Plan

The ultimate success of North American Waterfowl Management Plan (NAWMP) depends on maintaining relevance to stakeholders and society. In order to be relevant, a first step is to better understand what people value in regard to waterfowl and their habitats. Without this information, NAWMP population, habitat, and people objectives may not reflect stakeholder and societal values; and management...

Date published: July 19, 2016

Quantitative and Statistical Research Collaboration

Mathematical and statistical models are powerful research tools that play several important roles in conceptualizing and understanding the structure and dynamics of complicated ecological systems, including developing mechanistic hypotheses pertaining to ecological systems, designing studies that elucidate ecosystem structure and function, and extracting information from data.

Date published: June 27, 2016

Using Cell Technology to Track Species Movement

The Information Science Branch explored and developed ways to track species locations using a standard cellular phone network. This technology provides more tracking data at a faster rate and lower cost than traditional satellite tracking systems. The initial implementation of this approach currently provides support for the California Condor recovery program and is being extended to include...

Contacts: Tim Kern
Filter Total Items: 501
Date published: April 1, 2017

Digital map of hydrothermal alteration type, key mineral groups, and green vegetation of the northwestern United States derived from automated analysis of ASTER satellite data

Mineral groups identified through automated analysis of remote sensing data acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) were used to generate a map showing the type and spatial distribution of hydrothermal alteration, other exposed mineral groups, and green vegetation across the northwestern conterminous United States. Boolean algebra was used to

Date published: January 3, 2017

Offshore of Point Conception Map Area

Each GIS data file for the Offshore Of Point Conception map area is listed below with a brief description, a small image, and links to the metadata files and the downloadable data files. The data were compiled in ArcMap (version 10.2.2, ESRI, 2014). Raster data layers are registered TIFF images and are in the UTM Zone 10 coordinate system. Point, line, and polygon features are in shapefile...

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 ocean-currents projections: 1-year storm in Orange County

Model-derived ocean current velocities (in meters per second) 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

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 water-level projections: average conditions in Orange County

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

Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from CHC14 Tidal creek stations in San Pablo Bay and China Camp Marsh, California

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

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 water-level projections: 20-year storm in Ventura County

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

Date published: January 1, 2017

Geology and geomorphology--Offshore of Gaviota Map Area, California

This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Gaviota map area, California. The vector data file is included in "Geology_OffshoreGaviota.zip," which is accessible from https://doi.org/10.5066/F7TH8JWJ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Cochrane, G.R.,...

Date published: January 1, 2017

1992 pruned digital surface model Malakoff Diggins State Historic Park, California

One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive ter

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 wave-hazard projections: 100-year storm in Santa Barbara County

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

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 ocean-currents projections: 20-year storm in Ventura County

Model-derived ocean current velocities (in meters per second) 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

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 flood-hazard projections: 100-year storm in Ventura County

Geographic extent of projected coastal flooding, low-lying vulnerable areas, and maxium/minimum flood potential (flood uncertainty) associated with the sea-level rise and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosi

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 water-level projections: 1-year storm in Ventura County

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

Filter Total Items: 350
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Year Published: 1990

National water summary 1987: Hydrologic events and water supply and use

Water use in the United States, as measured by freshwater withdrawals in 1985, averaged 338,000 Mgal/d (million gallons per day), which is enough water to cover the 48 conterminous States to a depth of about 2.4 inches. Only 92,300 Mgal/d, or 27.3 percent of the water withdrawn, was consumptive use and thus lost to immediate further use; the...

Carr, Jerry E.; Chase, Edith B.; Paulson, Richard W.; Moody, David W.
Attribution: Water, Central Midwest Water Science Center, Dakota Water Science Center, , , Kansas Water Science Center, Minnesota Water Science Center, Pennsylvania Water Science Center, Texas Water Science Center, Utah Water Science Center, , Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Water Resources, Water Availability and Use Science Program, , , Region 4: Mississippi Basin, Region 6: Arkansas-Rio Grande-Texas-Gulf, , Region 7: Upper Colorado Basin, Region 1: North Atlantic-Appalachian, Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, United States of America
National water summary 1987: hydrologic events and water supply and use; 1990; WSP; 2350; Carr, Jerry E.; Chase, Edith B.; Paulson, Richard W.; Moody, David W.

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Year Published: 1990

A water-resources data-network evaluation for Monterey County, California; Phase 3, Northern Salinas River drainage basin

This report evaluates existing data collection networks and possible additional data collection to monitor quantity and quality of precipitation, surface water, and groundwater in the northern Salinas River drainage basin, California. Of the 34 precipitation stations identified, 20 were active and are concentrated in the northwestern part of the...

Templin, W.E.; Schluter, R.C.
A water-resources data-network evaluation for Monterey County, California; Phase 3, Northern Salinas River drainage basin; 1990; WRI; 89-4123; Templin, W. E.; Schluter, R. C.

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Year Published: 1990

Estimates of consumptive use and ground-water return flow and the effect of rising and sustained high river stage on the method of estimation in Cibola Valley, Arizona and California, 1983 and 1984

In Cibola Valley, Arizona, water is pumped from the Colorado River to irrigate crops and to maintain wildlife habitat. Unused water percolates to the water table and, as groundwater, moves downgradient into areas of phreatophytes, into a drainage ditch, out of the flood plain, and back to the river. In 1983 and 1984, groundwater return flow was...

Owen-Joyce, Sandra J.
Estimates of consumptive use and ground-water return flow and the effect of rising and sustained high river stage on the method of estimation in Cibola Valley, Arizona and California, 1983 and 1984; 1990; WRI; 89-4194; Owen-Joyce, Sandra J.

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Year Published: 1990

The San Andreas Fault System, California

Maps of northern and southern California printed on flyleaf inside front cover and on adjacent pages show faults that have had displacement within the past 2 million years. Those that have had displacement within historical time are shown in red. Bands of red tint emphasize zones of historical displacement; bands of orange tint emphasize major...

Wallace, Robert E.
The San Andreas Fault System, California; 1990; PP; 1515; Edited by Wallace, Robert E.

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Year Published: 1989

Observations in Monterey Canyon and Fan Valley using the submersible Alvin and a photographic sled

Eittreim, Stephen L.; Embley, R.W.; Normark, W.R.; Greene, H. Gary; McHugh, C.M.; Ryan, W.B.
Observations in Monterey Canyon and Fan Valley using the submersible Alvin and a photographic sled; 1989; OFR; 89-291; Eittreim, Stephen L.; Embley, R. W.; Normark, W. R.; Greene, H. G.; McHugh, C. M.; Ryan, W. B.

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Year Published: 1988

Estimates of consumptive use and ground-water return flow using water budgets in Parker Valley, Arizona and California, 1981-84

Annual water budgets were used to estimate consumptive use by vegetation and groundwater return flow in Parker Valley, Arizona and California. Consumptive use by vegetation was estimated to be 482,800 acre-ft in 1981, 432,000 acre-ft in 1982, 413,500 acre-ft in 1983, and 420,900 acre-ft in 1984 on the Arizona side of the Colorado River, and 45,400...

Owen-Joyce, Sandra J.
Estimates of consumptive use and ground-water return flow using water budgets in Parker Valley, Arizona and California, 1981-84; 1988; WRI; 88-4063; Owen-Joyce, Sandra J.

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Year Published: 1988

Landslides, Floods, and Marine Effects of the Storm of January 3-5, 1982, in the San Francisco Bay Region, California

A catastrophic rainstorm in central California on January 3-5,1982, dropped as much as half the mean annual precipitation within a period of about 32 hours, triggering landslides and floods throughout 10 counties in the vicinity of the San Francisco Bay. More than 18,000 of the slides induced by the storm transformed into debris flows that swept...

Ellen, Stephen D.; Wieczorek, Gerald F.
Landslides, Floods, and Marine Effects of the Storm of January 3-5, 1982, in the San Francisco Bay Region, California; 1988; PP; 1434; Edited by Ellen, Stephen D.; Wieczorek, Gerald F.

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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.

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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.

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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.

Filter Total Items: 961
WERC Coastal ecosystem
July 31, 2017

WERC Coastal Ecosystem Studies

Coastal ecosystem studies at Trinidad coast, California. 

July 31, 2017

A Current Immersion

Curt Storlazzi of the USGS explains how the water cycle pulled him into oceanography, and how his personal interests parallel his profession.
 

July 27, 2017

USGS Public Lecture: Warm Ice—Dynamics of Rapidly Changing Glaciers

  • Glacier Numerology – The how big, how long, how thick, how much, how often, of glacier science.
  • Glacier Photography – While a picture may be worth a thousand words, a collection of images may tell a complete forensic story.
  • Glacier Geophysics – How new technologies are being introduced to reexamine and refine decades old glacier analyses.
Southwest view of Soda-Avawatz Fault
July 26, 2017

Soda-Avawatz Fault, eastern Avawatz Mountains

This is a view to the southwest from the top of the piedmont on the eastern side of the Avawatz Mountains, ~25 km northwest of Baker, CA. In the foreground, from right to left, are the Avawatz Mountain Front, composed of Precambrian crystalline metamorphic rocks, a narrow pediment developed on these metamorphic rocks, a sliver of marble juxtaposed against the pediment, and

...
View from the sky looking at a steep oceanfront cliff with a road running along it close to the water, with lettering on top.
July 19, 2017

Location of Mud Creek slide

Lead-in to the Mud Creek slide UAS (drone) footage, Big Sur, California, July 19. 2017.

Two same-size items: Pack of playing cards (top) and circuit board with fan and electronic components (bottom).
July 18, 2017

Small computer that controls video cameras above beach in Santa Cruz

The small computer, or “micro-controller,” at the bottom of this photo controls the operation of two video cameras mounted on the 10-story Dream Inn hotel in Santa Cruz, California. The cameras take 10-minute videos of Santa Cruz Main Beach and Cowells Beach every half hour during daylight hours (view the most recent images).

...
Photograph of California coastal Highway 1 looking north toward Big Sur.
July 12, 2017

Big Sur Coast

Near San Simeon, view looks north up Highway 1 along the California coast toward Big Sur.

Drone’s-eye views of the toe of the Mud Creek landslide, from videos shot by Shawn Harrison on July 12, 2017
July 12, 2017

Drone’s-eye views of the toe of the Mud Creek landslide

Drone’s-eye views of the toe of the Mud Creek landslide, from videos shot by Shawn Harrison on July 12, 2017

Photo of child and USGS employee studying an egg.
July 11, 2017

Child Looking at Egg

Taken 7/11/2017 in Suisun City. The California Waterfowl Association hosts a "Youth Hunter Camp" for children at the Grizzly Ranch in Suisun City, CA. Here, a USGS employee and a child look through a tube at an egg to observe its contents.

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

...
Photo of USGS employee teaching children how to monitor vegetation density and height for waterfowl studies.
July 11, 2017

WERC Measuring Vegetation around Waterfowl Nests

Taken 7/11/2017 in Suisun City, CA. A USGS employee teaches children at the California Waterfowl Association's "Youth Hunter Camp" to measure the vegetation surrounding waterfowl nests.

Photo of USGS employee building a decoy waterfowl nest for outreach demonstration.
July 11, 2017

WERC Scientist Building Decoy Waterfowl Nest

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. 

Filter Total Items: 925
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).

USGS
February 25, 2013

The movie "The Impossible" graphically depicts destruction caused by the 2004 Indian Ocean tsunami which resulted in catastrophic loss of life and property – are similar, equally destructive events likely to occur in the Pacific Northwest?

Meeting between California Emergency Management Agency, CalVO, and ...
February 21, 2013

Many of California's young volcanoes pose a threat to people and property.

USGS
February 11, 2013

Arsenic, uranium, fumigants and nitrate were detected at high concentrations in untreated groundwater at depths in the aquifer system typically used for public water supply in the Madera County region of California’s San Joaquin Valley.

USGS
January 29, 2013

Lake Mead National Recreation Area's water quality is good, the sport fish populations are sufficient, and the lakes provide important habitat for an increasing number of birds. 

USGS
January 18, 2013

A century of scientific creativity and innovation has allowed seismologists to "see" into the outer layers of our planet, revealing the deep properties of the Earth's crust.