Unified Interior Regions

Nevada

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: 74
Date published: June 2, 2017
Status: Completed

Groundwater Discharge by Evapotranspiration from Areas of Spring-Fed Riparian Vegetation, Stump Spring and Hiko Springs, Nev.

Stump Spring has been designated as an Area of Critical Environmental Concern by the Bureau of Land Management (BLM), and Hiko Springs currently is in the designation process. Both springs flow intermittently in drainages where the depth to groundwater is shallow. The shallow groundwater flowing to and from the springs sustain scarce desert riparian habitats. BLM has recognized a need for...

Contacts: Geoff Moret
Date published: May 26, 2017
Status: Active

Evaporation from Lake Mead and Lake Mohave, Lower Colorado River Basin, Nevada and Arizona

The Bureau of Reclamation currently utilizes a model (24-Month Study) that projects future Colorado River reservoir volumes and potential dam operations based on current and forecasted hydrologic conditions and operational policies and guidelines. Each month, a water budget is developed, and Colorado River reservoir volumes and releases are projected for the next 24-month period. Reservoir...

Contacts: Geoff Moret
Date published: May 26, 2017
Status: Active

Estimating Annual Groundwater Discharge by Evapotranspiration Along the Wild and Scenic Portion of the Amargosa River

The USGS Nevada Water Science Center is refining estimates of annual groundwater discharge along the Wild and Scenic portion of the Amargosa River (AWSR) and adjacent spring discharge areas. Discharge estimates will be based on evapotranspiration (ET) measurements made along the Amargosa River during a 2-year period, previous estimates of evapotranspiration rates, and remote sensing techniques...

Contacts: Michael Pavelko
Date published: May 25, 2017
Status: Completed

Budgets and Chemical Characterization of Groundwater for the Diamond Valley Flow System, Central Nevada

The Diamond Valley flow system (DVFS) consists of six basins or hydrographic areas (HAs) in central Nevada: southern and northern Monitor Valleys, Antelope Valley, Kobeh Valley, Stevens Basin, and Diamond Valley. The six basins are, in part, hydrologically connected by ephemeral streams, by groundwater flow in shallow basin-fill aquifers, and, possibly, by subsurface flow in deeper carbonate-...

Contacts: Kip Allander
Date published: May 3, 2017
Status: Active

Chemical Quality of Water Deliveries to Stillwater National Wildlife Refuge, Nevada

The ecosystems of Stillwater National Wildlife Refuge (SNWR) are critical habitat for migratory birds. Increased irrigation efficiencies have reduced the amount of fresh water delivered to the wetlands, leading Congress to include provisions in the 1990 Truckee-Carson-Pyramid Lake Water Rights Settlement Act to assist with wetland restoration and maintenance. The Secretary of the Interior has...

Contacts: Kip Allander
Date published: April 27, 2017
Status: Completed

Groundwater Discharge by Evapotranspiration, Flow of Water in Unsaturated Soil, and Stable Isotope Water Sourcing in Areas of Sparse Vegetation, Amargosa Desert, Nye County, Nevada

The USGS conducted a study to evaluate the potential for groundwater discharge from sparsely vegetated areas in the Amargosa Desert. The study objectives were to: (1) compute groundwater discharge based on evapotranspiration and precipitation measurements at instrumented sites, and (2) improve understanding of hydrologic-continuum processes controlling groundwater discharge through analysis of...

Contacts: Geoff Moret
Date published: April 27, 2017
Status: Completed

Evaluation of Groundwater Flow in the Southern Part of the Amargosa Desert, Nevada and California

Since the original publication of the Death Valley regional groundwater flow system (DVRFS) numerical model in 2004, more information on the regional groundwater flow system in the form of new data and interpretations has been compiled. Cooperators such as the Bureau of Land Management, National Park Service, U.S. Fish and Wildlife Service, the Department of Energy, and Nye County, Nevada,...

Contacts: Wayne Belcher
Date published: April 13, 2017
Status: Active

Effects of Groundwater Withdrawals, Tracy Segment

The USGS Nevada Water Science Center began an investigation in 2010 to quantify hydrologic effects of groundwater withdrawals on Truckee River streamflow in the Tracy Segment hydrographic area, Storey, Washoe and Lyon Counties, Nevada. Groundwater gradients have been monitored at sites near pumping wells and the river. Water-level fluctuations resulting from local pumping are interpreted with...

Contacts: Kip Allander
Date published: April 11, 2017
Status: Active

Hydrogeologic and Geothermal Conditions of the Northwest Volcanic Aquifers

Although sparsely populated, this area in southeastern Oregon, northeastern California, northwestern Nevada, and southeastern Idaho has high geothermal heat flow that may be used to generate large amounts of electricity.

Date published: April 3, 2017
Status: Active

Occurrence and Mobility of Arsenic in Groundwater Used for Public Supply in Southern Carson Valley, Douglas County, Nevada

Over the past 15 years, Douglas County, Nev., has removed production wells in northern Carson Valley from use due to relatively high arsenic concentrations.  To maintain the supply of water to the public, the town of Minden has been providing water to Douglas County and Carson City.  Due to the projected increases in municipal demand, water resource managers are concerned that increasing...

Date published: March 27, 2017
Status: Active

Evaluating Artificial Storage and Recovery Potential of Bedell Flat, Washoe County, Nevada

Truckee Meadows Water Authority (TMWA) is a public water purveyor in northwest Nevada with responsibility for providing water to approximately 385,000 people in the Reno/Sparks metropolitan area and suburban communities north of Reno. TMWA has a conjunctive use strategy, which includes aquifer storage and recovery (ASR), to both maintain the health of local aquifers and supplement limited...

Contacts: Ramon C Naranjo
Date published: March 27, 2017
Status: Active

Evaluation of the Migration of Palliative Chemicals Used for Dust Abatement, Clark County, Nevada

The USGS Nevada Water Science Center is collaborating with the Bureau of Land Management and PolyAnalyltik Laboratory in Ontario, Canada to evaluate the potential migration of butyl acrylate vinyl acetate (dust palliative) in soil and storm runoff from areas of application in southern Nevada. There is concern regarding the exposure of the desert tortoise and other wildlife to palliative...

Filter Total Items: 63
Date published: April 19, 2016

The United States Interagency Elevation Inventory (USIEI)

The USIEI is a comprehensive, nationwide listing of known high-accuracy topographic and bathymetric data for the United States and its territories. The project is a collaborative effort of the USGS and NOAA with contributions from other federal agencies. The inventory supports the 3D Elevation Program and the Integrated Ocean and Coastal Mapping effort. This resource is updated in Spring and...

Date published: April 19, 2016

Elevation Data

The 3DEP products and services available through The National Map consist of lidar point clouds (LPC), standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

Date published: April 12, 2016

Orthoimagery Data

Orthoimagery data typically are high resolution aerial images that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a planimetric map. The National Map offers public domain, 1-meter orthoimagery for the conterminous United States with many urban areas and other locations at 2-foot or finer resolution.

Date published: April 12, 2016

The National Map Small-Scale Collection

The National Map offers a collection of small-scale datasets, most of which are at 1:1,000,000. The National Map publishes two data collections at one million-scale: one for Global Map users and one for National Map users. In terms of vector geometry, the lines, points, and areas in these data collections are identical. The difference is in the attributes assigned to these features.

Date published: March 4, 2016

Current Alerts for U.S. Volcanoes

Volcano-alert notifications are produced by Volcano Observatory scientists based on analysis of data from monitoring networks, direct observations, and satellite sensors. They are issued for both increasing and decreasing volcanic activity and include text about the nature of the unrest or eruption and about potential or current hazards and likely outcomes.

Date published: January 1, 2016

Groundwater discharge areas for Antelope, Kobeh, and Monitor Valleys, Central Nevada, 1964

This dataset represents "phreatophyte areas" mapped as part of a groundwater reconnaissance effort in four valleys in central Nevada and published in 1964. The data were digitized for comparison with mapping of groundwater discharge areas done in 2011 as part of a groundwater study in these valleys published in 2016.

Date published: January 1, 2016

Previous mineral-resource assessment data compilation for the U.S. Geological Survey Sagebrush Mineral-Resource Assessment Project

This data release consists of a compilation of previously published mineral potential maps that were used for the Sagebrush Mineral-Resource Assessment (SaMiRA) project. This information was used as guides for assessing mineral potential assessment of approximately 10 million acres in Idaho, Montana, Nevada, Utah, and Wyoming. Specifically, the compilation was used to identify the d

Date published: October 22, 2015

Evaporation data from Lake Mead and Lake Mohave, Nevada and Arizona, March 2010 through April 2015

Evaporation rates were measured at Lake Mead and Lake Mohave, Nev. as part of a multi-phase evaporation study. This USGS data includes evaporation data from March 2010 through April 2015 for Lake Mead and from May 2013 through April 2015 for Lake Mohave.

Date published: October 2, 2014

Evapotranspiration units for Dixie Valley, Churchill County, Nevada

This data set was created as part of a U.S. Geological Survey study, done in cooperation with Bureau of Reclamation. The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications.

Date published: October 2, 2014

Temperature Normalized Enhanced Vegetation Index for Dixie Valley, Churchill County, Nevada

The Enhanced Vegetation Index (EVI) was calculated for 10 Landsat 5 Thematic mapper scenes and combined with brightness temperature in an effort to reduce confounding (high) EVI values resulting from forbes and cheat grass in sparsely vegetated areas, and biological soil crusts from bare soil to densely vegetated areas.

Filter Total Items: 102
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Year Published: 2011

Big Spring spinedace and associated fish populations and habitat conditions in Condor Canyon, Meadow Valley Wash, Nevada

Executive Summary: This project was designed to document habitat conditions and populations of native and non-native fish within the 8-kilometer Condor Canyon section of Meadow Valley Wash, Nevada, with an emphasis on Big Spring spinedace (Lepidomeda mollispinis pratensis). Other native fish present were speckled dace (Rhinichthys osculus) and...

Jezorek, Ian G.; Connolly, Patrick J.; Munz, Carrie S.; Dixon, Chris
Big Spring spinedace and associated fish populations and habitat conditions in Condor Canyon, Meadow Valley Wash, Nevada; 2011; OFR; 2011-1072; Jezorek, Ian G.; Connolly, Patrick J.; Munz, Carrie S.; Dixon, Chris

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Year Published: 2011

Relative abundance and distribution of fishes and crayfish at Ash Meadows National Wildlife Refuge, Nye County, Nevada, 2007-08

This study provides baseline data of native and non-native fish populations in Ash Meadows National Wildlife Refuge (NWR), Nye County, Nevada, that can serve as a gauge in native fish enhancement efforts. In support of Carson Slough restoration, comprehensive surveys of Ash Meadows NWR fishes were conducted seasonally from fall 2007 through summer...

Scoppettone, G. Gary; Rissler, Peter; Johnson, Danielle; Hereford, Mark
Relative abundance and distribution of fishes and crayfish at Ash Meadows National Wildlife Refuge, Nye County, Nevada, 2007-08; 2011; OFR; 2011-1017; Scoppettone, G. Gary; Rissler, Peter; Johnson, Danielle; Hereford, Mark

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Year Published: 2010

Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop

The Northern Walker Lane comprises a complex network of active faults in northwestern Nevada and northeastern California bound on the west by the Sierra Nevada and on the east by the extensional Basin and Range Province. Because deformation is distributed across sets of discontinuous faults, it is particularly challenging to integrate geologic and...

Briggs, Richard W.; Hammond, William C.
Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop; 2010; OFR; 2011-1282; Briggs, Richard W.; Hammond, William C.

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Year Published: 2010

Distribution and movement of bull trout in the upper Jarbidge River watershed, Nevada

In 2006 and 2007, we surveyed the occurrence of bull trout (Salvelinus confluentus), the relative distributions of bull trout and redband trout (Oncorhynchus mykiss), and stream habitat conditions in the East and West Forks of the Jarbidge River in northeastern Nevada and southern Idaho. We installed passive integrated transponder (PIT) tag...

Allen, M. Brady; Connolly, Patrick J.; Mesa, Matthew G.; Charrier, Jodi; Dixon, Chris

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Year Published: 2009

Complete Analytical Data for Samples of Jurassic Igneous Rocks in the Bald Mountain Mining District, Nevada

This report presents all petrographic, major oxide, and trace element data for a set of 109 samples collected during an investigation of Jurassic igneous rocks in the Bald Mountain mining district, Nevada. Igneous rocks in the district include the Bald Mountain stock, quartz-feldspar porphyry dikes, basaltic andesite dikes, aplite sills, and rare...

du Bray, Edward A.
Complete Analytical Data for Samples of Jurassic Igneous Rocks in the Bald Mountain Mining District, Nevada; 2009; OFR; 2009-1144; du Bray, Edward A.

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Year Published: 2008

What can we learn from the Wells, NV earthquake sequence about seismic hazard in the intermountain west?

The February 21, 2008 Wells, NV earthquake (M 6) was felt throughout eastern Nevada, southern Idaho, and western Utah. The town of Wells sustained significant damage to unreinforced masonry buildings. The earthquake occurred in a region of low seismic hazard with little seismicity, low geodetic strain rates, and few mapped faults. The peak...

Petersen, M.D.; Pankow, K.L.; Biasi, G.P.; Meremonte, M.
What can we learn from the Wells, NV earthquake sequence about seismic hazard in the intermountain west?; 2008; Abstract or summary; Poster; Petersen, M. D.; Pankow, K. L.; Biasi, G. P.; Meremonte, M.

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Year Published: 2007

Dissolved solids in basin-fill aquifers and streams in the southwestern United States

The U.S. Geological Survey National Water-Quality Assessment Program performed a regional study in the Southwestern United States (Southwest) to describe the status and trends of dissolved solids in basin-fill aquifers and streams and to determine the natural and human factors that affect dissolved solids. Basin-fill aquifers, which include the...

Anning, David W.; Bauch, Nancy J.; Gerner, Steven J.; Flynn, Marilyn E.; Hamlin, Scott N.; Moore, Stephanie J.; Schaefer, Donald H.; Anderholm, Scott K.; Spangler, Lawrence E.
Dissolved Solids in Basin-Fill Aquifers and Streams in the Southwestern United States; 2007; SIR; 2006-5315; Anning, David W.; Bauch, Nancy J.; Gerner, Steven J.; Flynn, Marilyn E.; Hamlin, Scott N.; Moore, Stephanie J.; Schaefer, Donald H.; Anderholm, Scott K.; Spangler, Lawrence E.

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Year Published: 2007

Using a remote sensing/GIS model to predict southwestern Willow Flycatcher breeding habitat along the Rio Grande, New Mexico

Introduction The Southwestern Willow Flycatcher (Empidonax traillii extimus; hereafter SWFL) is a federally endangered bird (USFWS 1995) that breeds in riparian areas in portions of New Mexico, Arizona, southwestern Colorado, extreme southern Utah and Nevada, and southern California (USFWS 2002). Across this range, it uses a variety of plant...

Hatten, James R.; Sogge, Mark K.
Using a Remote Sensing/GIS Model to Predict Southwestern Willow Flycatcher Breeding Habitat along the Rio Grande, New Mexico; 2007; OFR; 2007-1207; Hatten, James R.; Sogge, Mark K.

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Year Published: 2007

Effects of population increase on cui-ui growth and maturation

Cui-ui Chasmistes cujus is endemic to Pyramid Lake, Nevada. The cui-ui population declined during much of the 20th century as a result of water diversion and the formation of a shallow and virtually impassable delta at the mouth of the Truckee River, its spawning habitat. The population increased more than 10-fold to more than 1 million adults...

Scoppettone, G.G.; Rissler, P.H.
Effects of population increase on cui-ui growth and maturation; 2007; Article; Journal; Transactions of the American Fisheries Society; Scoppettone, G. G.; Rissler, P. H.

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Year Published: 2006

Water Budgets and Potential Effects of Land- and Water-Use Changes for Carson Valley, Douglas County, Nevada, and Alpine County, California

To address concerns over continued growth in Carson Valley, the U.S. Geological Survey, in cooperation with Douglas County, Nevada, began a study in February 2003 to update estimates of water-budget components in Carson Valley. Estimates of water-budget components were updated using annual evapotranspiration (ET) rates, rates of streamflow loss to...

Maurer, Douglas K.; Berger, David L.
Water Budgets and Potential Effects of Land- and Water-Use Changes for Carson Valley, Douglas County, Nevada, and Alpine County, California; 2006; SIR; 2006-5305; Maurer, Douglas K.; Berger, David L.

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Year Published: 2006

Report of the workshop on Extreme Ground Motions at Yucca Mountain, August 23-25, 2004

This Workshop has its origins in the probabilistic seismic hazard analysis (PSHA) for Yucca Mountain, the designated site of the underground repository for the nation's high-level radioactive waste. In 1998 the Nuclear Regulatory Commission's Senior Seismic Hazard Analysis Committee (SSHAC) developed guidelines for PSHA which were published as...

Hanks, T.C.; Abrahamson, N. A.; Board, M.; Boore, D.M.; Brune, J.N.; Cornell, C.A.
Report of the Workshop on Extreme Ground Motions at Yucca Mountain, August 23-25, 2004; 2006; OFR; 2006-1277; Hanks, T. C.; Abrahamson, N. A.; Board, M.; Boore, D. M.; Brune, J. N.; Cornell, C. A.

Filter Total Items: 110
A RestoreNet garden with plots covered by white cloth.
August 31, 2018

RestoreNet garden testing seedling establishment.

The RestoreNet gardens test seedlings of priority restoration species across the Southwest. This is a recently installed garden located in the juniper woodlands of the Colorado Plateau. The experiemental network will support land managers by providing insight into various restoration techniques, including testing seedlings vs seeds.

August 29, 2018

Image of the Week - Burning Man

Every year, tens of thousands of people descend upon an unforgiving windswept playa in northwestern Nevada to build a city.

Within months, the city is gone.

Burning Man is named for the wooden effigy set ablaze at the end of the weeklong celebration in the temporary metropolis of Black Rock City.

It all happens on an ancient alkali flat nestled between

Satellite image showing reflection of soil.
August 26, 2018

Burning Man's Temporary City

Burning Man is named for the wooden effigy set ablaze at the end of the weeklong celebration in the temporary metropolis of Black Rock City.

Band 7 of Landsat 8’s Operational Land Imager is sensitive to moisture in and above the soil. It makes the silty water that runs through the playa on May 22, 2017 pop in

...
August 17, 2018

Overview of Indirect Measurements - Survey Requirements

This video provides an overview of the different indirect measurement methods used by the USGS, as well as a brief description of what you'll need to survey for each. 
 

July 2, 2018

Survey Requirements for Road Overflow Indirect Measurements

In this video, you will learn what and where to survey for a road overflow or broad-crested weir indirect measurement. 
 

June 20, 2018

Indirect Measurement Field Notes and Metadata

This video describes the notes and other metadata that need to be recorded during indirect measurement surveys.
 

June 1, 2018

Survey Requirements - Road Overflow/Broad-Crested Weir

This video describes how and where to flag high water marks for a road overflow or broad-crested weir indirect measurement of peak discharge. 
 

April 23, 2018

Image of the Week - Urban Growth in Las Vegas, Nevada, USA

For over 45 years Landsat has been monitoring the earth. In that time Las Vegas, Nevada has seen incredible urban growth, as documented in images like these.

At the USGS EROS Center, we study land change, operate the Landsat satellites, and maintain the longest, continuously acquired collection of images of the Earth's land surface.

USGS EROS Center (

Satellite image showing the growth of Las Vegas.
April 11, 2018

Urban Growth in Las Vegas, Nevada, USA

Decades of consistent data from Landsat help scientists monitor the growth of urban areas in a world where more than half of the population lives in cities. For example, Las Vegas, Nevada, one of the fastest growing metropolitan areas in the United States, has seen its population expand from 273,000 in 1972 to 2,204,

...
Gray metal box standing next to a river with a sign in green and black writing
December 31, 2017

USGS Streamgaging Station in northern Nevada.

USGS Streamgaging Station in northern Nevada. 

Woman standing in middle of stream next to instruments
December 31, 2017

Measuring streamflow in northern Nevada.

USGS technician measuring streamflow in northern Nevada.

July 6, 2017

Wildlife on the Nevada National Security Site

Mountain lions, desert bighorn sheep, mule deer, and a variety of other wildlife live on and pass through the Nevada National Security Site each day. It’s a highly restricted area that is free of hunting and has surprisingly pristine areas.This 22-minute program highlights an extraordinary study on how mountain lions interact with their prey. It shows how the scientists

Filter Total Items: 143
photo of grasslands surrounding Winnemucca, Nevada
June 12, 2018

The advent of remote sensing was a boon to the ancient science of phenology.

Satellite data offered a global view of nature’s seasonal life cycles that historical tabulators of budding trees and buzzing bees could scarcely imagine.

From the start, however, remotely sensed phenology has come with caveats.

A wildfire in a forest
September 7, 2017

A growing number of wildfire-burned areas throughout the western United States are expected to increase soil erosion rates within watersheds, causing more sediment to be present in downstream rivers and reservoirs, according to a new study by the U.S. Geological Survey.

Image: Burning Sagebrush
September 6, 2017

An examination of long-term data for lands managed by the Bureau of Land Management finds that land treatments in the southwestern United States are increasingly large, expensive and related to fire and invasive species control.

USGS science for a changing world
August 14, 2017

The U.S. Geological Survey awarded approximately $4.9 million this week to six universities and a university-governed non-profit, to support transitioning the west coast “ShakeAlert” earthquake early warning system into a production system.

Image shows a color-based map of the various magnetic readings of the Great Basin
May 3, 2017

Vast mineral wealth has been discovered in the Great Basin since the 1800s. As each new generation of prospectors and geologists brings their cutting-edge tools with them, the arid ridgelines of the desert Southwest have shown more and more potential.

Walker Lake on a Spring day
April 24, 2017

USGS model simulations suggest that Walker Lake will rise by as much as 15 to 18 feet this year, the most in a single year in recorded history.

Image shows a map of U.S. states colored based on the value of their mineral industry
April 14, 2017

In 2016, these five states led the pack in mineral production, accounting for about one third of the total mineral production value for the entire country.

Lake Mead
March 15, 2017

The Colorado River system provides about 35 million Americans with a portion of their water supply. It irrigates 5½ million acres of land in the West and provides water to tribes, parks, and wildlife. The system serves parts of seven States and Mexico—but reservoir levels have crept lower over the past several years, sparking questions about how much water remains and who will have access.

Large waves crashing on rocks at beach.
February 22, 2017

Atmospheric rivers are a global weather phenomenon that can bring large amounts of rain or snow to the U.S. West Coast each year. These rivers of wet air form over the Pacific Ocean near Hawaiʻi and pick up large amounts of moisture from the tropics and on their way to the West Coast. This moisture is carried in narrow bands across the Pacific Ocean to California, Oregon, Washington and Nevada.

Photo of a young girl drinking water, which likely originated from groundwater sources. 
January 19, 2017

A regional assessment of untreated groundwater in the Basin and Range basin-fill aquifers, which include parts of Nevada, California, Arizona, Utah and adjacent states, is now available from the U.S. Geological Survey.

Acoustic Doppler Current Profiler
January 12, 2017

You are invited to join USGS scientists and field technician crews as they collect discharge measurements in rainfall-affected areas.