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Filter Total Items: 133
Mars Dunes
Date Published: November 9, 2018
Status: Completed

Mars Dunes

Sand dunes are among the most widespread aeolian features present on Mars, serving as unique indicators of the interaction between the atmosphere and surface. On a planetary body, dunes accumulate where a supply of sand-sized grains exists or may be abraded, is carried downwind by winds of saltation strength, and is subsequently deposited where these winds weaken below the...

Person using meter to collect relative gravity data near Tucson, Arizona
Date Published: October 24, 2018
Status: Active

Aquifer-Storage Change and Land-Surface Elevation Change Monitoring in the Tucson Active Management Area

The Arizona Water Science Center is monitoring aquifer-storage changes and land subsidence within the Tucson Active Management Area (AMA). Land-surface elevation change is monitored at a network of benchmarks throughout the Tucson AMA by measuring changes in land surface elevation over time (approximately annually) with Interferometric Synthetic Aperture Radar (InSAR).  Aquifer-storage change...

Artist drawing of Opportunity Rover
Date Published: October 24, 2018
Status: Active

MER MI Products

A single MI image or an Microscopic Imager mosaic can be merged with Pancam color images. The two products must be coregistered first, and then added together to produce colorized images in which the intensity comes from the MI and color (hue/saturation) comes from the Pancam images. This method of colorizing data may not yield a satisfactory product if the solar illumination...

USGS
Date Published: October 24, 2018
Status: Active

Evidence of Cryovolcanism on Titan

The Cassini RADAR team led by USGS scientist, Randolph Kirk, has discovered the "best candidate yet" for an ice volcano on Saturn's moon Titan. The 3D view reveals multiple mountain peaks, deep pits and finger-like flows at Sotra Facula. Some of the terrain resembles volcanic cones, craters and flows on Earth but made of Titan materials (ice and/or carbon compounds) not molten...

USGS
Date Published: October 24, 2018
Status: Active

Cassini Observations of Io's Visible Aurorae

As the Cassini spacecraft passed through the Jovian system on its way to Saturn, it captured more than 500 images of Jupiter's moon Io in eclipse. Cassini's near-ultraviolet filters detected the moon's bright equatorial glows, supporting the interpretation that the visible emissions are predominantly due to molecular sulfer dioxide (SO2).

USGS
Date Published: October 24, 2018
Status: Active

Laboratory Infrared Spectroscopy of Mars Analog Materials

Former USGS scientist, Jeff Johnson, performed key research on the detection of dust on the Martian surface. This work explored the laboratory thermal infrared and visible/near-infrared spectroscopy of palagonitic dust coatings on rock substrates and experimentally shocked feldspars and pyroxenes.

Viking (left) and MGS (right) views of the northern hemisphere of Mars in polar orthographic map projections.
Date Published: October 22, 2018
Status: Active

Three Decades of Martian Surface Changes

The surface of Mars has changed dramatically during the three decades spanned by spacecraft exploration. Comparisons of Mars Global Surveyor images with Viking and Mariner 9 pictures suggest that more than one third of Mars' surface area has brightened or darkened by at least 10%. 

Section of an image map for Candor and Ophir Chasmata
Date Published: October 22, 2018
Status: Active

Valles Marineris - The Grand Canyon of Mars

The Valles Marineris is a system of canyons located just south of the Martian equator. The system is about 4000 km long, and, if on earth, would extend all the way across the United States. The central individual troughs, generally 50 to 100 km wide, merge into a depression as much as 600 km wide. In places the canyon floor reaches a depth of 10 km, 6 to 7 times deeper than...

Volcano Ice Gangis
Date Published: October 22, 2018
Status: Active

Sub-ice Volcanism on Earth and Mars

Sub-glacially erupted volcanoes form free-standing flat-topped mesas, known as tuyas. Although there are some silicic edifices (e.g. Tuffen et al., 2002), most terrestrial sub-ice volcanoes are mafic and consist of horizontal layered basaltic lavas overlying friable flank deposits of steeply-dipping (angled) hyaloclastite breccias composed of variably-altered fine-grained...

Cochran basin crater on Venus
Date Published: October 22, 2018
Status: Active

Venus Magellan Impact Crater Database

The NASA Magellan spacecraft provided synthetic aperture radar (SAR) image coverage of 98% of the surface of the planet Venus, in addition to topography and several types of physical property data on the venusian surface (e.g., radar reflectivity, radar backscatter, emissivity, and rms slopes).(See Special Magellan Issue of J. Geophys. Res., v. 97, nos. E8 and E10, August 25...

Merge of MI Pancam of feature Serpent taken Sol 73
Date Published: October 22, 2018
Status: Active

Mars MER Microscopic Imager Surface Findings

The Microscopic Imagers (MI) on the Mars Exploration Rovers, Spirit and Opportunity, have returned images of Mars with higher resolution than any previous camera system, allowing detailed petrographic and sedimentological studies of the rocks and soils. Designed to simulate a geologist’s hand lens, the MI cameras were mounted on the rovers’ instrument arms. They can resolve...

Large Pyroclastic Deposit captured by Lunar Orbiter
Date Published: October 19, 2018
Status: Archived

Moon Pyroclastic Volcanism Project

The products of explosive or pyroclastic volcanic eruptions on the Moon have intrigued lunar scientists for years. These deposits, nearly 100 in number and spread widely across the lunar surface, are generally dark and smooth-surfaced. Although pyroclastic materials were found in all lunar samples and thus they are known to be widely dispersed from their sources, the dark...

Filter Total Items: 47
Illustration related to the the river corridor
April 19, 2016

The National Hydrography Dataset (NHD) and Watershed Boundary Dataset (WBD) are used to portray surface water on The National Map.

3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge
April 19, 2016

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 Fall.

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

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.

Orthoimagery of Augusta Ga
April 12, 2016

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.

Small Scale Collection USA
April 12, 2016

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.

USGS science for a changing world logo
March 12, 2016

WaterWatch is a U.S. Geological Survey (USGS) World Wide Web site that displays maps, graphs, and tables describing real-time, recent, and past streamflow conditions for the United States. The real-time information generally is updated on an hourly basis.

Ash-rich plume rises out of Halemaʻumaʻu Crater, Kilauea Volcano Hawaiʻi
March 4, 2016

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.

USGS science for a changing world
January 1, 2016

This dataset contains data on the length, mass, and muscle total mercury concentration of Brown Trout (Salmo trutta) and Rainbow Trout (Oncorhynchus mykiss) collected from the Colorado River in Glen Canyon National Recreation Area (GLCA) and Grand Canyon National Park (GRCA), and Bright Angel Creek in GRCA.

 Screen Shot of the Land Treatment Digital Library Home Page
November 23, 2013

The Land Treatment Digital Library (LTDL) was created by the USGS to catalog legacy land treatment information on Bureau of Land Management lands in the western United States. The LTDL can be used by federal managers and scientists for compiling information for data-calls, producing maps, generating reports, and conducting analyses at varying spatial and temporal scales.

Land Treatment Digital Library version 6, application splash screen
July 24, 2013

This software allows agencies, organizations, and individuals to download an empty, stand-alone Land Treatment Digital Library database to individual or networked computers. Data entered in these databases may be submitted to the USGS for possible inclusion in the online Land Treatment Digital Library (https://ltdl.wr.usgs.gov).

Screen shot of NSDI node for SIR 2010-5064
June 11, 2010

This dataset was used as the basis for estimating land disturbance from oil and gas activity in the UCRB. The dataset is a compilation of five state oil and gas datasets from June of 2007. The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications.

Filter Total Items: 126
Publication Thumbnail
Year Published: 2000

Hydrogeology of the regional aquifer near Flagstaff, Arizona, 1994-97

Sandstones, siltstones, and limestones that are Pennsylvanian to Permian in age underlie the southern part of the Colorado Plateau near Flagstaff, Arizona, and contain a complex regional aquifer that has become increasingly important as a source of water for domestic, municipal, and recreational uses. Ground-water flow in the regional aquifer is...

Bills, Donald J.; Truini, Margot; Flynn, Marilyn E.; Pierce, Herbert A.; Catchings, Rufus D.; Rymer, Michael J.
Hydrogeology of the regional aquifer near Flagstaff, Arizona, 1994-97; 2000; WRI; 2000-4122; Bills, Donald J.; Truini, Margot; Flynn, Marilyn E.; Pierce, Herbert A.; Catchings, Rufus D.; Rymer, Michael J.

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Year Published: 2000

Method to identify wells that yield water that will be replaced by water from the Colorado River downstream from Laguna Dam in Arizona and California

Accounting for the use of Colorado River water is required by the U.S. Supreme Court decree, 1964, Arizona v. California. Water pumped from wells on the flood plain and from certain wells on alluvial slopes outside the flood plain is presumed to be river water and is accounted for as Colorado River water. The accounting-surface method developed...

Owen-Joyce, Sandra J.; Wilson, Richard P.; Carpenter, Michael C.; Fink, James B.
Method to identify wells that yield water that will be replaced by water from the Colorado River downstream from Laguna Dam in Arizona and California; 2000; WRI; 2000-4085; Owen-Joyce, Sandra J.; Wilson, Richard P.; Carpenter, Michael C.; Fink, James B.

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Year Published: 2000

Chemical characteristics of urban stormwater sediments and implications for environmental management, Maricopa County, Arizona

Investigations of the chemical characteristics of urban stormwater sediments in the rapidly growing Phoenix metropolitan area of Maricopa County, Arizona, showed that the inorganic component of these sediments generally reflects geologic background values. Some concentrations of metals were above background values, especially cadmium, copper, lead...

Parker, J.T.C.; Fossum, K.D.; Ingersoll, T.L.
Chemical characteristics of urban stormwater sediments and implications for environmental management, Maricopa County, Arizona; 2000; Article; Journal; Environmental Management; Parker, J. T. C.; Fossum, K. D.; Ingersoll, T. L.

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Year Published: 1999

Monitoring the Effects of Ground-Water Withdrawals from the N Aquifer in the Black Mesa Area, Northeastern Arizona

Littin, Gregory R.
Monitoring the Effects of Ground-Water Withdrawals from the N Aquifer in the Black Mesa Area, Northeastern Arizona; 1999; FS; 064-99; Littin, Gregory R.

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Year Published: 1999

Ground-water quality in the Sierra Vista subbasin, Arizona, 1996-97

Coes, Alissa L.; Gellenbeck, Dorinda J.; Towne, Douglas Clark
Ground-water quality in the Sierra Vista subbasin, Arizona, 1996-97; 1999; WRI; 99-4056; Coes, Alissa L.; Gellenbeck, Dorinda J.; Towne, Douglas Clark

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Year Published: 1999

Hydrogeologic investigations of the Sierra Vista subwatershed of the Upper San Pedro Basin, Cochise County, southeast Arizona

The hydrogeologic system in the Sierra Vista subwatershed of the Upper San Pedro Basin in southeastern Arizona was investigated for the purpose of developing a better understanding of stream-aquifer interactions. The San Pedro River is an intermittent stream that supports a narrow corridor of riparian vegetation. Withdrawal of ground water will...

Pool, Donald R.; Coes, Alissa L.
Hydrogeologic investigations of the Sierra Vista subwatershed of the Upper San Pedro Basin, Cochise County, southeast Arizona; 1999; WRI; 99-4197; Pool, Donald R.; Coes, Alissa L.

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Year Published: 1999

Ground-water quality in alluvial basins that have minimal urban development, south-central Arizona

Ground-water quality data (1917-96) from 772 wells in 16 alluvial basins that have minimal urban development were used to determine the effect of nonurban factors on ground-water quality in south- central Arizona. Characterization of the spatial variability of ground-water quality within and among alluvial basins that have minimal urban...

Gellenbeck, Dorinda J.; Coes, Alissa L.
Ground-water quality in alluvial basins that have minimal urban development, south-central Arizona; 1999; WRI; 99-4005; Gellenbeck, Dorinda J.; Coes, Alissa L.

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Year Published: 1999

Ground-water, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona, 1997

The Black Mesa monitoring program is designed to document long-term effects of ground-water from the N aquifer by industrial and municipal users. The N aquifer is the major source of water in the 5,400-square-mile Black Mesa area, and the ground water occurs under confined and unconfined conditions. Monitoring activities include continuous and...

Littin, Gregory R.; Baum, Bradley M.; Truini, Margot
Ground-water, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona, 1997; 1999; OFR; 98-653; Littin, Gregory R.; Baum, Bradley M.; Truini, Margot

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Year Published: 1998

Modeling of flood-deposited sand distributions in a reach of the Colorado River below the Little Colorado River, Grand Canyon, Arizona

A release from Glen Canyon Dam during March-April 1996 was designed to test the effectiveness with which the riparian environment could be renewed with discharges greatly in excess of the normal powerplant-restricted maximum. Of primary concern was the rebuilding of sand deposits along the channel sides that are important to the flora and fauna...

Wiele, S.M.
Modeling of flood-deposited sand distributions in a reach of the Colorado River below the Little Colorado River, Grand Canyon, Arizona; 1998; WRI; 97-4168; Wiele, S. M.

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Year Published: 1997

Modeling of sand movement storage in the Colorado River through the Grand Canyon

Wiele, Stephen Mark
Modeling of sand movement storage in the Colorado River through the Grand Canyon; 1997; FS; 227-96; Wiele, Stephen Mark

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Year Published: 1997

Ground-water, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona, 1996

The Black Mesa monitoring program is designed to document long-term effects of ground-water pumping from the N aquifer by industrial and municipal users. The N aquifer is the major source of water in the 5,400-square-mile Black Mesa area, and the ground water occurs under confined and unconfined conditions. Monitoring activities include...

Littin, Gregory R.; Monroe, Stephen A.
Ground-water, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona, 1996; 1997; OFR; 97-566; Littin, Gregory R.; Monroe, Stephen A.

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Year Published: 1997

Hydrologic data, Colorado River and major tributaries, Glen Canyon Dam to Diamond Creek, Arizona, water years 1990-95

The U.S. Geological Survey collected hydrologic data at 12 continuous-record stations along the Colorado River and its major tributaries between Glen Canyon Dam and Diamond Creek. The data were collected from October 1989 through September 1995 as part of the Bureau of Reclamation's Glen Canyon Environmental Studies. The data include daily values...

Rote, John J.; Flynn, Marilyn E.; Bills, D.J.
Hydrologic data, Colorado River and major tributaries, Glen Canyon Dam to Diamond Creek, Arizona, water years 1990-95; 1997; OFR; 97-250; Rote, John J.; Flynn, Marilyn E.; Bills, D. J.

Filter Total Items: 200
July 31, 2017

Historic Context of the Continuous Slope Area Method

The Arizona Water Science Center details the history and development of the Continuous Slope-Area Method. Learn about the people and events that began these new advances in the field of stream gaging. 

Music Artist: Glenn Jones, “Bergen County Farewell”. CC License. Music provided by www.FreeMusicArchive.com

Two researchers aligning a 2 meter by 2 meter PVC square for an experimental restoration plot within a fenced area.
July 31, 2017

Setting up experimental restoration plots.

Field crew install a Restoration Field Trial Network garden in the rangelands of Northern Arizona. Each garden in the network is examining seedlings and seeds in conjunction with restoration treatments to better

...
July 31, 2017

Advances in Streamgaging | Reach-Scale Monitoring Experiment (1 of 2)

In this first installment of a two part series, The Arizona Water Science Center has developed new stream gaging methods that would measure flood flows remotely. However, they have to verify the accuracy of these techniques, so they designed an experiment in partnership with the USDA Southwest Watershed Research Center at the Walnut Gulch Experimental Watershed that

...
July 30, 2017

A Record of Change: Science and Elder Observations on the Navajo N.

A Record of Change—Science and Elder Observations on the Navajo Nation is a 25-minute documentary about collaborative studies using conventional physical sciences, combined with tribal elder observations to show that local knowledge and conventional science partnerships can effectively document ecosystem change and determine the resulting challenges to livelihoods. 

...
Photo of seeding experiment to improve restoration outcomes in the Southwest.
July 17, 2017

Seeding experiment to improve restoration outcomes in the Southwest.

USGS ecologists Molly McCormick (left) and Katie Laushman (right) conducting a seeding experiment that is a part of RAMPS, a new USGS-led initiative to improve restoration outcomes in the Southwest. 

...
Blowing dust in a fallowed agricultural field in central Arizona.
June 30, 2017

Bare Ground = Blowing Dust

Across the desert Southwest, ground void of plant material is prone to soil erosoin and dust storms. In this fallowed agricultural field, we see that a spring breeze can carry away fertile top soil and create air quality concerns. USGS RAMPS defines causes of environmental hazards created by degraded land, and creates collaborative solutions to reduce these types of risks

...
Satellite images showing landsat 7 and landsat 8 fire images on the western U.S.
June 29, 2017

Fires in the Western United States

On an average day during the fire season, multiple wildfires burn in the western United States. For example, 216 fires were active on July 7, 2017. Firefighters were battling 27 of these fires through ground and air support.

A few of the larger fires in early July were in Arizona, Washington, and Utah. As with many wildfires, 

...
Satellite image showing the Las Vegas, Lake Mead, Grand Canyon area
June 16, 2017

Satellite Image of the Las Vegas, Lake Mead, Grand Canyon Area

This image of the Las Vegas /Lake Mead / Grand Canyon area was acquired on June 16, 2017, with Indian Space Research Organization’s Resourcesat-2 AWiFS sensor. Images of this region can be useful to help detect changes in vegetation and water availability for growing desert communities.

May 31, 2017

New USGS Maps of Mars Reveal Ancient Oases

Flyover of the southeast Ceti Mensa map. Distinct groups of rock layers, called geologic units, are shaded in different colors, with dark browns representing the oldest rocks and green representing the youngest rocks. All of these rocks formed as wind-blown sand that became trapped in shallow, ephemeral lakes, similar to the wet playas of the desert southwest US. The

...
May 31, 2017

Reach-Scale Monitoring | Advances in Stream Gaging

The Arizona Water Science Center demonstrates new methods in Reach-Scale Monitoring to improve accuracy and measurability of high flow events. By installing pressure transducers and using LiDAR to measure topography data, hydrologists are able to simulate flows with two dimensional models which will help better calibrate stream gages. These advances have potential to aid

...
An extremely rare Mojave River western pond turtle was recently observed in the Mojave Desert.
May 4, 2017

An extremely rare Mojave River western pond turtle

An extremely rare Mojave River western pond turtle was recently observed by USGS scientists and staff from The Living Desert Zoo and Gardens in the Mojave Desert. Turtles of this population have rarely been seen since the late 1990s.

June 3, 2016

Particle Tracking

The Arizona Water Science Center discusses the use of a new method, called particle tracking, that will revolutionize the way USGS obtains stream flow data.

Filter Total Items: 179
Southwestern Willow Flycatcher
September 6, 2016

A new report by the U.S. Geological Survey shows, for the first time ever, detailed habitat information on the entire range of a federally listed endangered bird allowing officials to take a scientific approach to helping protect the species.

Photograph showing San Pedro Riparian National Conservation Area.
August 18, 2016

Streamflow and groundwater levels are declining in some locations along the San Pedro River near Sierra Vista, Arizona, according to a new report by the U.S. Geological Survey.

Photo of the Colorado River near Moab, Utah
August 15, 2016

Future groundwater replenishment in the Upper Colorado River Basin may benefit from projected increases in future basin-wide precipitation under current climate projections, according to a recent study by the U.S. Geological Survey and Bureau of Reclamation.

Four numbered sample jars containing brownish water and small snails in a laboratory connected to tubes and electronic meter.
August 4, 2016

To gain insights into the risks associated with uranium mining and processing, U.S. Geological Survey scientists are investigating how uranium moves into and up food chains.

Map of the 48 contiguous states showing Microcystin concentrations
May 31, 2016

First-of-its-kind survey shows that algal toxins are found nationwide

USGS
May 25, 2016

Laura Norman was asked to provide a presentation at the Hassayampa River Study meeting. Stakeholders in the 3,700 km² watershed are interested in the benefits of hydrologic modeling to assess if stormwater management practices would impact stormflows, sedimentation, and groundwater recharge.

An image of Hi'iaka Montes and Hi'iaka Patera on Jupiter's volcanic moon Io.
May 19, 2016

Mountains on Io, Jupiter’s volcanic moon, are formed by a unique geologic mechanism not found elsewhere in the solar system, according to a new study by the U.S. Geological Survey.

Topographic Map of Mercury
May 6, 2016

The first topographic map of Mercury was released today by the U.S. Geological Survey, Arizona State University, Carnegie Institute of Washington, Johns Hopkins University Applied Physics Laboratory and NASA.

USGS
December 1, 2015

A newly published, three-volume “Remote Sensing Handbook” is a comprehensive coverage of all remote sensing topics written by over 300 leading global experts.

Filter Total Items: 83