Unified Interior Regions

Arizona

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: 142
Date published: September 17, 2018
Status: Completed

Gene Shoemaker - Founder of Astrogeology

He once said he considered himself a scientific historian, one whose mission in life is to relate geologic and planetary events in a perspective manner. A modest statement coming from a legend of a man who almost single-handedly created planetary science as a discipline distinct from astronomy. He brought together geologic principles to the mapping of planets, resulting in...

Date published: September 17, 2018
Status: Completed

1961: USGS Astrogeology's First Published Map

The race to the moon began on August 17, 1958, and the Soviet Union won. This isn't the opening line of an alternate history story; rather, it is an acknowledgment that more than one moon race took place. The first, with the goal of launching a small automated spacecraft to the moon, began with the liftoff of the Able 1 lunar orbiter, a 38-kilogram U.S. Air Force (USAF) probe...

Date published: September 12, 2018
Status: Active

Regional Planetary Image Facility (RPIF)

The NASA/USGS Astrogeology Regional Planetary Information Facility (RPIF), located in the Shoemaker Building (Building 6) on the USGS Campus in Flagstaff, Arizona, is a facility of the USGS Astrogeology Science Center. The Astro RPIF houses in 3000 square feet of climate-controlled space more than 100,000 lunar and planetary maps, a reference library, an ever-growing photo and...

Contacts: Amy Zink
Date published: August 9, 2018
Status: Active

USGS Response to Possible Metals Contamination from Legacy Mines in the Patagonia Mountains Region and Adjacent Areas, Southeast Arizona and a Template for Future Mineral Environmental Emergency Response

USGS is conducting sampling, monitoring, and modeling in the Patagonia Mountains and nearby regions in Arizona to identify contaminant risk potential of legacy and proposed mine sites and to develop classification criteria for predicting vulnerabilities and targeted sources and sinks of metal contaminants.

Contacts: Floyd Gray
Date published: August 5, 2018
Status: Active

Global Hyperspectral Imaging Spectroscopy of Agricultural-Crops & Vegetation (GHISA)

This webpage showcases the key research advances made in hyperspectral remote sensing of agricultural crops and vegetation over the last 50 years. There are three focus areas:

Date published: July 23, 2018
Status: Active

BOR environmental DNA sampling for invasive mussels at USGS gages

As part of an ongoing project funded by the Bureau of Reclamation and lead by the Idaho Water Sciences Center (IDWSC) and Northern Rocky Mountain Research Center (NOROCK), the Upper Midwest Environmental Sciences Center (UMESC) will analyze environmental DNA samples collected at gage stations directly downstream of multiple reservoirs throughout the Columbia River Basin. The goal of this...

Contacts: Jon Amberg
Date published: July 8, 2018
Status: Active

AzWSC Capabilities: Arizona Water Use

Since 1950, the AzWSC has estimated water use by county at 5-year intervals, publishing the results in a series of reports since 1981. Water demand is met by pumping groundwater from aquifers or by conveying surface water to users through a system of reservoirs and canals. Because of the importance of water to Arizona’s communities and future economic development, the AzWSC works cooperatively...

Contacts: Saeid Tadayon
Date published: July 5, 2018
Status: Active

Assessment of Infiltration and Recharge due to Wetland Restoration in a Semiarid Ecosystem- Laura M. Norman

This intern will work with an exciting team of scientists to develop novel approaches to assess wetland restoration. Methods include documenting baseline conditions and monitoring site evolution, hydrologic modeling, using shallow piezometers to estimate recharge and storage change, tracking streambed water exchanges using heat as a tracer, and estimating percolation using electrical...

Date published: May 10, 2018
Status: Active

Land Treatment Exploration Tool

The Land Treatment ExplorationTool provides a practical resource for managers who are planning restoration and rehabilitation actions on public lands. The tool generates a variety of spatial products while being user friendly for all levels of GIS expertise, even to those with little or no experience.

Date published: May 1, 2018
Status: Active

Bird Banding Laboratory

The Bird Banding Laboratory (BBL) is an integrated scientific program established in 1920 supporting the collection, archiving, management and dissemination of information from banded and marked birds in North America.  This information is used to monitor the status and trends of resident and migratory bird populations. Because birds are good indicators of the health of the environment, the...

Date published: March 19, 2018
Status: Active

AzWSC Capabilities: Reservoir and Lake Monitoring and Assessment

The Arizona Water Science Center (AzWSC) has specialized expertise in monitoring, measuring, and collecting reservoir and lake water and sediment for a variety of phycial and chemical properties.

Date published: March 19, 2018
Status: Active

Ciénega San Bernardino - Wetland Restoration

Desert marshes, or ciénega, are extremely biodiverse habitats imperiled by anthropogenic demands for water and changing climates. Given their widespread loss and increased recognition as important wildlife habitat, remarkably little is known about restoration techniques.

Contacts: Laura M Norman
Filter Total Items: 130
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Year Published: 1992

Summary of ground-water conditions in Arizona 1985-86

No abstract available. 

Wilson, Richard P.
Summary of ground-water conditions in Arizona 1985-86; 1992; WRI; 90-4179; Wilson, Richard P.

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Year Published: 1991

Low-flow sediment transport in the Colorado River

In support of beach-stability research, bedload and suspended sediment were measured during a steady flow of 5,880 ft3/s and receding flows from 12,100 to 5,660 ft3/s in the Colorado River above National Canyon, near Supai, Arizona, October 7-12, 1989. During steady flows, 75 percent of the mean total-sediment discharge of 128 t/d was in...

Gray, John R.; Webb, Robert H.; Hyndman, David W.
Low-flow sediment transport in the Colorado River; 1991; Article; Conference publication; Proceedings of the Fifth Federal Interagency Sedimentation Conference; Gray, John R.; Webb, Robert H.; Hyndman, David W.

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Year Published: 1991

Lower Colorado River Accounting System (LCRAS) computer program and documentation

von Allworden, B. K.; Owen-Joyce, Sandra J.; Sandoval, John D.; Raymond, Lee H.
Lower Colorado River Accounting System (LCRAS) computer program and documentation; 1991; OFR; 91-179; von Allworden, B. K.; Owen-Joyce, Sandra J.; Sandoval, John D.; Raymond, Lee H.

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Year Published: 1991

Relation of sediment load and flood-plain formation to climatic variability, Paria River drainage basin, Utah and Arizona

Flood-plain alluviation began about 1940 at a time of decreasing magnitude and frequency of floods in winter, summer, and fall. No floods with stages high enough to inundate the flood plain have occurred since 1980, and thus no flood-plain alluviation has occurred since then. The decrease in magnitude and frequency of floods appears to have...

Graf, J.B.; Webb, R. H.; Hereford, R.
Relation of sediment load and flood-plain formation to climatic variability, Paria River drainage basin, Utah and Arizona; 1991; Article; Journal; Geological Society of America Bulletin; Graf, J. B.; Webb, R. H.; Hereford, R.

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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.
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

Aggradation and degradation of alluvial sand deposits, 1965 to 1986, Colorado River, Grand Canyon National Park, Arizona

Alluvial sand deposits along the Colorado River in Grand Canyon National Park are used as campsites and are substrate for vegetation. The largest and most numerous of these deposits are formed in zones of recirculating current that are created downstream from where the channel is constricted by debris fans at tributary mouths. Alluvial sand...

Schmidt, John C.; Graf, Julia B.
Aggradation and degradation of alluvial sand deposits, 1965 to 1986, Colorado River, Grand Canyon National Park, Arizona; 1990; PP; 1493; Schmidt, John C.; Graf, Julia B.

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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

Estimates of ground-water flow components for Lyman Lake, Apache County, Arizona

Bills, D.J.; Hjalmarson, H.W.; Robertson, F.N.
Estimates of ground-water flow components for Lyman Lake, Apache County, Arizona; 1990; WRI; 89-4151; Bills, D. J.; Hjalmarson, H. W.; Robertson, F. N.

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Year Published: 1989

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 of water in the lower Colorado River flood plain. The project area was in Parker Valley, Arizona. The approach selected was to measure the areas...

Raymond, Lee H.; Rezin, Kelly V.
Evapotranspiration estimates using remote-sensing data, Parker and Palo Verde valleys, Arizona and California; 1989; WSP; 2334; Raymond, Lee H.; Rezin, Kelly V.

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Year Published: 1989

Progress report on the ground-water, surface-water, and quality-of-water monitoring program, Black Mesa Area, northeastern Arizona; 1988-89

The Black Mesa monitoring program in Arizona is designed to determine long-term effects on the water resources of the area resulting from withdrawals of groundwater from the N aquifer by the strip-mining operation of Peabody Coal Company. Withdrawals by Peabody Coal Company increased from 95 acre-ft in 1968 to 4 ,090 acre-ft in 1988. The N aquifer...

Hart, R.J.; Sottilare, J.P.
Progress report on the ground-water, surface-water, and quality-of-water monitoring program, Black Mesa Area, northeastern Arizona; 1988-89; 1989; OFR; 89-383; Hart, R. J.; Sottilare, J. P.

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Year Published: 1989

Water Resources Data for Arizona, Water Year 1987

Wilson, R.P.; Garrett, W.B.
Water Resources Data for Arizona, Water Year 1987; 1989; WDR; AZ-87-1; Wilson, R. P.; Garrett, W. B.

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Year Published: 1988

Aggradation and degradation of alluvial sand deposits, 1965 to 1986, Colorado River, Grand Canyon National Park, Arizona

High discharges occurring between 1983-1985 resulted in redistribution of sand stored in zones of recirculating current in the Colorado River in Grand Canyon National Park. Redistribution resulted in net loss in the number of reattachment deposits in narrow reaches and aggradation of some separation deposits. Separation deposits were more stable...

Schmidt, J.C.; Graf, J.B.
Aggradation and degradation of alluvial sand deposits, 1965 to 1986, Colorado River, Grand Canyon National Park, Arizona; 1988; OFR; 87-555; Schmidt, J. C.; Graf, J. B.

Filter Total Items: 243
May 5, 2016

First Global Topographic Map of Mercury

An animation of the USGS topographic map of Mercury created using images from NASA’s MESSENGER spacecraft.

April 19, 2016

USGS: More Than a Workplace

Employees of the Arizona Water Science Center describe their experiences working for the USGS revealing that it is far more than just a workplace.

Sonoran desert spring wildflower display.
March 31, 2016

Sonoran Desert Wildflowers and Invasive Species

Ecosystems are changing at a rapid pace. It can be difficult to determine if a landscape is in need of restoration. In this photo of the spring wildflower bloom in the Sonoran desert, an invasive annual grass, Bromus rubens (red brome), is pervasive. Land managers have to make decisions about when, where, and how to intervene in a system. Does this grass pose a threat to

...
Image: Saguaro National Park, East Unit, Southern Arizona -  ca. 1935
March 14, 2016

Saguaro National Park, East Unit, Southern Arizona - ca. 1935

This camera station is located on a hill within the newly established Saguaro National Monument near Tucson. The view is northeast toward Agua Caliente Hill and looks down a gentle incline that drains into Tanque Verde Creek. The saguaro stand pictured here is a particularly memorable one because of the many large individuals and absence of small ones. It is an example of

...
Attribution: Land Resources
Image shows the Colorado River cutting through the Grand Canyon
March 7, 2016

Colorado River through the Grand Canyon

A view of the Grand Canyon, with the Great Unconformity visible. Credit: Alex Demas, USGS.

Attribution:
Aerial view showing greenup of restoration plots in the lower Colorado River Delta following the 2014 Minute 319 pulse flow.
October 31, 2015

Aerial view of lower Colorado River

Aerial view showing the intense greenup of restoration plots in the lower Colorado River Delta following the 2014 Minute 319 pulse flow.

Photograph showing San Pedro Riparian National Conservation Area.
June 1, 2015

San Pedro Riparian National Conservation Area

Photograph showing San Pedro Riparian National Conservation Area, residential development southeast of Sierra Vista, Arizona, and the Huachuca Mountains from Hereford Road, Cochise County, Arizona. 

May 24, 2015

Texas Flood Surveys

Hydrologists from Arizona aid the Texas Water Science Center in gathering measurements and other information after the catastrophic Blanco River flooding event that swept Austin, Texas.

March 25, 2015

Drone Survey

USGS revolutionizes data collection by surveying a river channel within the Redlands area using a drone.

March 1, 2015

Flood at Oak Creek South of Sedona

This video captures the bizarre occurrences that can happen during a flood. A USGS employee witnesses such an event while taking a measurement at Oak Creek from a cable way.

February 5, 2015

Learning Hydrology

The Field Hydrology Class from the University of Arizona learns how to take a discharge measurement with USGS Hydrologist.

DEM Merge of the Moon
February 4, 2015

LRO LOLA and Kaguya Terrain Camera DEM Merge 60N60S 512ppd

The LOLA and Kaguya Teams have created an improved lunar digital elevation model (DEM) covering latitudes within ±60°, at a horizontal resolution of 512 pixels per degree (∼59 m at the equator) and a typical vertical accuracy ∼3 to 4 m. This DEM is constructed from ∼4.5×109 geodetically-accurate topographic heights from the Lunar Orbiter Laser Altimeter (LOLA) onboard the

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Filter Total Items: 200
USGS
August 21, 2014

U.S. Geological Survey field crews are measuring flooding after heavy rainfall occurred in northern portions of Maricopa County, Arizona.  

USGS science for a changing world logo
June 10, 2014

Increasing the density -- the amount per square mile -- of natural gas drilling sites and associated ponds in the Cypress Creek basin is not expected to have a substantial impact on the amount of sediment or water entering Brewer Lake, according to a new U.S. Geological Survey report.

Image:  Desert Perchlorate Field Work
April 3, 2014

Newly published research is the first to characterize the distribution and interactions of natural perchlorate in a terrestrial ecosystem. The study results are important in assessing risks associated with ecological and human health and with potential movement of natural perchlorate contamination into groundwater.

USGS
March 27, 2014

As a large pulse of water is being released into the former delta of the Colorado River along the U.S.-Mexico border, U.S. Geological Survey scientists are studying the effects on the environment as part of a historic, bi-national collaborative effort.

global image mosaic presenting a single view of Jupiter's moon Ganymede
February 12, 2014

More than 400 years after its discovery by Galileo, the largest moon in the Solar System – Ganymede – has finally claimed a spot on the map. 

USGS
December 19, 2013

Secretary of the Interior Sally Jewell announced today that Interior’s Southwest Climate Science Center is awarding nearly $1.2 million to universities and other partners for research to guide managers of parks, refuges and other cultural and natural resources in planning how to help species and ecosystems adapt to climate change.

USGS
December 13, 2013

Drought conditions are linked to declines in a protected desert tortoise population in part of the Sonoran Desert, according to a U.S. Geological Survey study. 

USGS
August 8, 2013

Scientists are surveying a potential debris flow area within the Yarnell Hill burn zone, as part of a cooperative study by the U.S. Geological Survey, the Arizona Geological Survey, and the Arizona Department of Emergency Management. 

USGS
July 29, 2013

The Santa Cruz River watershed, located on the Arizona-Sonora portion of the U.S.-Mexico border, depends for its perennial flow on an international treatment plant that treats wastewater on both sides of the border before discharging it into the river in Arizona.

USGS
July 25, 2013

USGS research geologist Kyle House has been recognized by the Geological Society of America for work that helps explain how and when the Grand Canyon and the lower Colorado River took their present form, a scientific problem that has vexed geologists for more than a century.

USGS
April 9, 2013

The streamflow of the Verde River—one of Arizona's largest streams with year-round flow—declined from 1910 to 2005 as the result of human stresses, primarily groundwater pumping, according to a new U.S. Geological Survey study. The study's findings suggest that streamflow reductions will continue and may increase in the future.