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: August 1, 2016
Status: Active

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
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. 

Date published: July 5, 2016
Status: Active

Economic Impacts of Ecological Restoration

Federal investments in ecosystem restoration projects protect Federal trusts, ensure public health and safety, and preserve and enhance essential ecosystem services. These investments also generate business activity and create jobs. However, limited information exists on the costs and associated economic impacts of ecosystem restoration projects due to the complexity of the “restoration...

Date published: July 1, 2016
Status: Active

Surveillance for the Presence of White-Nose Syndrome in the Bat Community at El Malpais National Monument, New Mexico

In 1999 and 2000, FORT conducted a survey of bats at El Malpais National Monument and adjacent lands. During this study, several species of bats were documented, including some that are known to use caves or lava-tube formations as roosts. In the winter of 2006–2007, the fungus-caused disease known as “white-nose syndrome” (WNS) began devastating populations of hibernating bat species that use...

Date published: July 1, 2016
Status: Active

Assessing Impacts to Ecosystems from Uranium Mining in the Grand Canyon Region

The use of uranium is an alternative energy source to petroleum products and some of the United States’ highest quality ore is located on the Colorado Plateau. However, some regions where suitable mining efforts are conducted include areas that are near important environmental resources such as National Parks that provide viewscapes and habitat for wildlife.

Date published: March 17, 2016

Volcano Hazards Assessments Help Mitigate Disasters

The Volcano Hazards Program develops long-range volcano hazards assessments. These includes a summary of the specific hazards, their impact areas, and a map showing ground-hazard zones. The assessments are also critical for planning long-term land-use and effective emergency-response measures, especially when a volcano begins to show signs of unrest.

Date published: March 3, 2016
Status: Active

Developing a USGS Legacy Data Inventory to Preserve and Release Historical USGS Data

Legacy data (n) - Information stored in an old or obsolete format or computer system that is, therefore, difficult to access or process. (Business Dictionary, 2016) For over 135 years, the U.S. Geological Survey has collected diverse information about the natural world and how it interacts with society. Much of this legacy information is one-of-a-kind and in danger of being lost forever...

Date published: June 13, 2015
Status: Active

Transboundary Aquifer Assessment Program (TAAP)

Transboundary aquifers are an essential source of water for United States – Mexico border communities. Declining water levels, deteriorating water quality, and increasing use of groundwater resources on both sides of the border raise concerns about the long-term availability of this supply.

The U.S. – Mexico Transboundary Aquifer Assessment Act (Public Law 109-448) of 2006 was enacted...

Filter Total Items: 134
Publication Thumbnail
Year Published: 1973

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

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

Publication Thumbnail
Year Published: 1973

Geohydrology of the Yuma area, Arizona and California

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

Filter Total Items: 260
Bureau of Land Management truck sprays herbicide in southwestern Idaho as part of a restoration effort. 
December 31, 2012

Truck sprays herbicide in Idaho as part of a restoration effort.

Bureau of Land Management truck sprays herbicide in southwestern Idaho as part of a restoration effort. 

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.

December 11, 2012

Streamflow Gaging Station and Measurement on San Pedro River, AZ

USGS employee, Hanna Coy, talks about stream gauging.

A photo of a female mountain bluebird with mistletoe.
November 28, 2012

WERC Mountain Bluebird Eating Mistletoe Berry

A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek).  These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.

Image: Sandbar growth Grand Canyon following controlled flood
October 31, 2012

Sandbar growth Grand Canyon following controlled flood

Picture showing the increased size of the sandbar after the November 2012 controlled flood from the Glen Canyon Dam. This location is 65 miles downstream from Lees Ferry and the view is looking downstream. These and additional photographs depicting the results of the recent controlled floods can be viewed online.

 

Aerial photo of the Kanab North Mine
October 8, 2012

Aerial view of the Kanab North Mine

An aerial photograph of the now-reclaimed Kanab North uranium mine, looking south, down Kanab Creek.

Image: Sandbar in Grand Canyon
September 30, 2012

Sandbar in Grand Canyon

Picture showing the size of the sandbar before the November 2012 controlled flood from the Glen Canyon Dam. This location is 65 miles downstream from Lees Ferry and the view is looking downstream. These and additional photographs depicting the results of the recent controlled floods can be viewed online.

 

September 30, 2012

USGS Fun

Working at the USGS can be fun. These student employees were given wonderful opportunities and made lasting friendships while working at the USGS.

September 12, 2012

Continuous Slope Area Method: Sycamore Creek, AZ

A video depicting the installation & operation of Continuous Slope Area gage and radar sensor, installed after the Sunflower Wild Fire on Sycamore Creek to measure streamflow from the Sunflower burned area. The streamflow data is used to provide flood warning to communities affected by runoff from the burned areas and for collecting streamflow data from areas that have

July 5, 2012

2012 Whitewater-Baldy Fire

USGS installed six early-flood-warning units—rain and stream gages—in the burned areas resulting from New Mexico's 2012 Whitewater-Baldy Fire. The gages transmit data via satellite to provide warnings to communities that may be affected by flooding.

October 2, 2011

Nat'l Comparison of USGS Compiled Irrigation Water Use Data

Highlights of the Scientific Investigations Report 2011-5166 which documents methods of irrigation and inventories irrigation data collected for the 2000 and 2005 U.S Geological Survey.

Valles Marineris on Mars
September 29, 2011

Valles Marineris on Mars

Mosaic of the Valles Marineris hemisphere of Mars projected into point perspective, a view similar to that which one would see from a spacecraft. The distance is 2500 kilometers from the surface of the planet, with the scale being .6km/pixel. The mosaic is composed of 102 Viking Orbiter images of Mars. The center of the scene (lat -8, long 78) shows the entire Valles

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Filter Total Items: 204
USGS science for a changing world logo
May 20, 2009

The U.S. Geological Survey will conduct scientific overflights at Grand Canyon National Park, Arizona, during Memorial Day weekend to document the status of natural and cultural resources along the Colorado River below Glen Canyon Dam. Aerial photographs will be taken using two fixed-wing aircraft flying at an elevation about 7,000 feet above ground level.

USGS science for a changing world logo
April 27, 2009

Adult endangered humpback chub (Gila cypha) in Grand Canyon, Arizona, increased by about 50 percent between 2001 and 2008, according to analysis recently conducted by the U.S. Geological Survey. The upward trend reverses population declines from 1989 to 2001. 

USGS science for a changing world logo
April 24, 2009

U.S. Geological Survey scientists will brief reporters by phone at 3:00 pm Eastern Daylight Time/12:00 pm Mountain Standard Time. Monday, April 27, on the latest population numbers for the humpback chub (Gila cypha) in Grand Canyon, Arizona.

USGS science for a changing world logo
March 2, 2009

Volunteers across the nation are being recruited to get outdoors and help track the effects of climate on seasonal changes in plant and animal behavior.
The USA-National Phenology Network (USA-NPN), a consortium of government, academic and citizen-scientists, is launching a new national program built on volunteer observations of flowering, fruiting and other seasonal events.

USGS science for a changing world logo
February 25, 2009

Unique fractures in lavas on ancient Mars suggest water occasionally flooded portions of the planet's surface.
The fractures, known as "columnar joints", are the first that have been observed on a planet other than Earth.

USGS science for a changing world logo
February 12, 2009

Astrogeologists at the U.S. Geological Survey in Flagstaff provided critical datasets used in the latest release of Google Earth. The updated software enables users to explore Mars in high detail.
"Without the ability to accurately co-align data sets, applications like Google Earth would not be nearly as useful," said Trent Hare, a GIS expert with the USGS Astrogeology Team.

USGS science for a changing world logo
December 18, 2008

Dr. Julio Betancourt, a U.S. Geological Survey senior scientist, was recently awarded a prestigious 2008 Presidential Rank Award. Betancourt, who has conducted groundbreaking research in how climate variability affects ecosystems, is also an adjunct professor at the University of Arizona, where he received his graduate degrees.

 

USGS
October 9, 2008

Local planetary geologist Chris Okubo is on a mission to understand the past roles of groundwater and faulting on Mars by studying similar locations on Earth.  Okubo works in the Astrogeology Research Program for the U.S. Geological Survey (USGS) in Flagstaff.

USGS
June 17, 2008

Long-term trends in landscape conditions have significantly reduced sagebrush habitat and populations of greater sage-grouse, according to a new study examining the bird's chances of survival.

USGS
April 21, 2008

The Upper San Pedro Partnership was recognized with the Department of the Interior's Cooperative Conservation Award today.

USGS
April 7, 2008

Time lapse videos of sandbars from the Glen Canyon Dam high flow experiment have been released by the U.S. Geological Survey (USGS).

USGS
March 18, 2008

Competition for water is becoming more intense as the nation's population continues to grow, increasing the demands for water use in agriculture and power production.