Unified Interior Regions

Region 8: Lower Colorado Basin

Regions L2 Landing Page Tabs

The Lower Colorad Basin includes Arizona, southern Nevada, and souther California. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions. Our scientists do a broad array of research and technical assistance throughout the U.S. and across the globe.

News

Date published: May 27, 2021

RAMPS NEWSLETTER - Spring 2021 Edition

Restoration Assessment and Monitoring Program for the Southwest (RAMPS)

A Program of the Southwest Biological Science Center & Ecosystems Mission Area

To subscribe to our newsletter, please visit: https://listserv.usgs.gov/mailman/listinfo/ramps

--

Date published: May 24, 2021

Aerial Mapping of the Colorado River over Memorial Day Weekend

The USGS will collect high-resolution aerial imagery over Grand Canyon National Park for approximately one week beginning Saturday, May 29, to document, observe and track long-term ecosystem changes in the Colorado River. Visitors along the Colorado River in Glen Canyon National Recreation Area and Grand Canyon National Park may see and hear aircraft more frequently during this time.

Date published: March 24, 2021

Media Advisory: A Jaguar’s Field of Dreams – Live Online Public Lecture

The U.S. Geological Survey public lecture series is back and virtual. News reporters are invited to attend to learn how USGS scientists are helping protect one of the only jaguars that lives in the U.S.

Filter Total Items: 4
Date published: March 26, 2019
Status: Active

Defining Native Ranges of U.S. Inland Fishes

Understanding the native versus non-native range of a species can provide useful information about dispersal, population distribution patterns, and human mediated movement across hydrologic barriers. The USGS Nonindigenous Aquatic Species (NAS) Program is working with partners to define native ranges of inland fishes in the United States to help identify which species should be included in the...

Date published: March 5, 2019
Status: Active

The Nonindigenous Aquatic Species Flood and Storm Tracker (FaST)

Storm-related flooding can lead to the potential spread of nonindigenous (or non-native) aquatic species into waterways they have not been seen in before. The USGS Nonindigenous Aquatic Species program has developed an innovative mapping tool to help natural resource managers with post-storm nonindigenous aquatic species detection and assessment efforts. 

Date published: April 11, 2016
Status: Active

Nonindigenous Aquatic Species (NAS) Program

Welcome to the Nonindigenous Aquatic Species (NAS) information resource for the United States Geological Survey. Located at Gainesville, Florida, this site has been established as a central repository for spatially referenced biogeographic accounts of introduced aquatic species. The program provides scientific reports, online/realtime queries, spatial data sets, distribution maps, and general...

Filter Total Items: 6
Publication Thumbnail
Year Published: 2021

Approaches for assessing long-term annual yields of highway and urban runoff in selected areas of California with the Stochastic Empirical Loading and Dilution Model (SELDM)

The California Department of Transportation, commonly known as CalTrans, and other municipal separate storm sewer system permittees in California as well as other State departments of transportation nationwide need information about potential loads and yields (loads per unit area) of constituents of concern in stormwater runoff and discharges from...

Granato, Gregory E.; Friesz, Paul J.
Granato, G.E., and Friesz, P.J., 2021, Approaches for assessing long-term annual yields of highway and urban runoff in selected areas of California with the Stochastic Empirical Loading and Dilution Model (SELDM): U.S. Geological Survey Scientific Investigations Report 2021–5043, 37 p., https://doi.org/10.3133/sir20215043.

Publication Thumbnail
Year Published: 2021

USGS National Water Quality Monitoring Network

What is the U.S. Geological Survey National Water Quality Monitoring Network?Understanding the water quality of U.S. streams and rivers requires consistent data collection and analysis over decades. The U.S. Geological Survey’s (USGS) National Water Quality Network (NWQN) was established to facilitate national-scale understanding of surface-water...

Riskin, Melissa L.; Lee, Casey J.
Lee, C.J., and Riskin, M.L., 2021, USGS National Water Quality Monitoring Network: U.S. Geological Survey Fact Sheet 2021–3019, 2 p., https://doi.org/10.3133/fs20213019.

Publication Thumbnail
Year Published: 2021

Evaluation and application of the Purge Analyzer Tool (PAT) to determine in-well flow and purge criteria for sampling monitoring wells at the Stringfellow Superfund site in Jurupa Valley, California, in 2017

The U.S. Geological Survey and U.S. Environmental Protection Agency are developing analytical tools to assess the representativeness of groundwater samples from fractured-rock aquifers. As part of this effort, monitoring wells from the Stringfellow Superfund site in Jurupa Valley in Riverside County, California, approximately 50 miles east of Los...

Harte, Philip T.; Perina, Tomas; Becher, Kent; Levine, Herb; Rojas-Mickelson, Daewon; Walther, Lesley; Brown, Anthony
Harte, P.T., Perina, T., Becher, K., Levine, H., Rojas-Mickelson, D., Walther, L., and Brown, A., 2021, Evaluation and application of the Purge Analyzer Tool (PAT) to determine in-well flow and purge criteria for sampling monitoring wells at the Stringfellow Superfund site in Jurupa Valley, California, in 2017: U.S. Geological Survey Scientific Investigations Report 2020–5140, 54 p., https://doi.org/10.3133/sir20205140.

Publication Thumbnail
Year Published: 2021

Multi-region assessment of chemical mixture exposures and predicted cumulative effects in USA wadeable urban/agriculture-gradient streams

Chemical-contaminant mixtures are widely reported in large stream reaches in urban/agriculture-developed watersheds, but mixture compositions and aggregate biological effects are less well understood in corresponding smaller headwaters, which comprise most of stream length, riparian connectivity, and spatial biodiversity. During 2014–2017,...

Bradley, Paul; Journey, Celeste A.; Romanok, Kristin; Breitmeyer, Sara; Button, Daniel T.; Carlisle, Daren; Huffman, Bradley; Mahler, Barbara; Nowell, Lisa H.; Qi, Sharon L.; Smalling, Kelly; Waite, Ian R.; Van Metre, Peter C.
Attribution: California Water Science Center, Colorado Water Science Center, Maryland-Delaware-D.C. Water Science Center, New Jersey Water Science Center, Ohio-Kentucky-Indiana Water Science Center, Oklahoma-Texas Water Science Center, Oregon Water Science Center, South Atlantic Water Science Center (SAWSC), Water Resources, Region 1: North Atlantic-Appalachian, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 3: Great Lakes, Region 4: Mississippi Basin, Region 5: Missouri Basin, Region 6: Arkansas-Rio Grande-Texas-Gulf, Region 7: Upper Colorado Basin, Region 8: Lower Colorado Basin, Region 9: Columbia-Pacific Northwest, Region 10: California-Great Basin, Region 11: Alaska, Region 12: Pacific Islands (American Samoa, Hawaii, Guam, Commonwealth of the Northern Mariana Islands)

Publication Thumbnail
Year Published: 2021

Changing climate drives future streamflow declines and challenges in meeting water demand across the southwestern United States

Society and the environment in the arid southwestern United States depend on reliable water availability, yet current water use outpaces supply. Water demand is projected to grow in the future and climate change is expected to reduce supply. To adapt, water managers need robust estimates of future regional water supply to support management...

Miller, Olivia L.; Putman, Annie Laura; Alder, Jay R.; Miller, Matthew; Jones, Daniel K.; Wise, Daniel

Publication Thumbnail
Year Published: 2021

Assessing the impact of drought on arsenic exposure from private domestic wells in the conterminous United States

This study assesses the potential impact of drought on arsenic exposure from private domestic wells by using a previously developed statistical model that predicts the probability of elevated arsenic concentrations (>10 μg per liter) in water from domestic wells located in the conterminous United States (CONUS). The application of the model to...

Lombard, Melissa; Daniel, Johnni; Jeddy, Zuha; Hay, Lauren; Ayotte, Joseph D.

Filter Total Items: 14
August 26, 2021

HLS: Magnum Fire, Arizona

 

Harmonized Landsat and Sentinel-2 (HLS) data are here!

The LP DAAC and the HLS Science Team are pleased to announce the release of Harmonized Landsat and Sentinel-2 (HLS) version 2.0 surface reflectance products. HLS data are composed of observations from Landsat 8 and Sentinel-2 and provide a set of seamless data products that can be utilized as if all

Map of U.S. mainland showing temperate, transitional and tropical temperature patterns
March 16, 2021

U.S. regions in the tropical-to-temperate transition

A map showing North America's tropical-to-temperate transition zone. Red, orange, and yellow depict the more tropical zones, and blues depict the more temperate zones, based on to the coldest recorded temperature for each area between 1980 and 2009. Photos show some cold-sensitive plants and animals with northern range limits governed by winter cold temperature extremes.

...
A school of snook, large subtropical game fish, in a Florida spring
March 15, 2021

Subtropical snook gather at a warm Florida springhead in winter

 Winter temperature extremes control the distributions of subtropical fishes. Common snook (Centropomus undecimalis), aggregate at a spring in northern Florida during winter. Snook are warm saltwater game fish, common in Florida, that have been moving further northward as extreme cold spells become less frequent and less intense.

 

Fire scorched desert landscape.
November 26, 2020

Fires transforming Sonoran Desert

Restoring areas infested with invasive species that carry catastrophic fire is a top priority for the Restoration Assessment and Monitoring Program for the Southest (RAMPS) and our partners. In 2019 & 2020, fires carried by the invasive red brome (Bromus rubens) grass destroyed hundreds of thousands of acres of Sonoran Desert Scrub, resulting in some of the

...
Two people kneel on the ground collecting soil samples in a golden grassland.
September 3, 2020

How does restoration affect soils?

How do restoration plantings alter ecosystem function? NAU PhD student Kathleen Balazs and technician Sarah Negovan measure soil water infiltration rates at a RestoreNet site near La Sal, Utah. These measurements will illustrate how restoration plantings effect certain ecosystem functions

A group of people stand around a map laid out in the back of a truck while on a field trip.
November 13, 2019

Managing Fire on the US Mexico Borderlands

RAMPS met with DOI Office of Wildland Fire, US Customs and Border Patrol, and US Fish & Wildlife Service staff at Buenos Aires National Wildlife Refuge in southern AZ last November. The group is developing tools to reduce wildfire risk, conserve wildlife habitat and natural resources, and increase safety and security of border operations.

...
A grassland
November 13, 2019

Arid grassland

Arid grasslands in the U.S. Mexico border are fire adapted and used by diverse groups. Science from the Southwest Biological Science Center and the Restoration Assessment and Monitoring Program for the Southwest (RAMPS) is helping these groups find common ground to manage this dynamic landscape.

Group of people learning about native plants
July 24, 2019

Supporting Tribal Seed Sovereignty

USGS Restoration Assessment and Monitoring Program for the Southwest (RAMPS) is helping to build capacity in ecosystem restoration on the Navajo Nation with a series of projects in collaboration with Navajo Nation Department of Natural Hertiage, Dine Native Plant Program, and the Native-led non-profit Tolani Lake Enterprises. For more information visit:

...
Flames from the Woodbury Fire at Tonto National Monument
December 31, 2018

Flames from the Woodbury Fire rise above Tonto National Monument

Flames from the Woodbury Fire rise above Tonto National Monument.

Skeletons of junipers (old trunks leftover from chaining) dot a rangeland.
March 22, 2018

Juniper Skeletons

Thinning rangelands by removing trees such as juniper is a common mangement action done across the intermountain west. The goals of this type of vegetation treatment typically are to increase forage and habitat for grazing animals, improve soil conditions, and/or reduce risks of catastrophic fire. In this photo, skeletons leftover from a chaining treatment dot a range in

...
Filter Total Items: 14
An infographic summarizing activities of the RAMPS program.
May 27, 2021

Restoration Assessment and Monitoring Program for the Southwest (RAMPS)

A Program of the Southwest Biological Science Center & Ecosystems Mission Area

To subscribe to our newsletter, please visit: https://listserv.usgs.gov/mailman/listinfo/ramps

--

Aerial photography of Grand Canyon with vegetation change data
May 24, 2021

The USGS will collect high-resolution aerial imagery over Grand Canyon National Park for approximately one week beginning Saturday, May 29, to document, observe and track long-term ecosystem changes in the Colorado River. Visitors along the Colorado River in Glen Canyon National Recreation Area and Grand Canyon National Park may see and hear aircraft more frequently during this time.

2021 March Public Lecture Flyer
March 24, 2021

The U.S. Geological Survey public lecture series is back and virtual. News reporters are invited to attend to learn how USGS scientists are helping protect one of the only jaguars that lives in the U.S.

Sunlight on red cliffs and river
February 8, 2021

Streamflow in the Southwestern U.S. is projected to decrease by as much as 36–80% by the end of this century, reports a new study by the U.S. Geological Survey. Decreases of this magnitude would challenge our ability to meet future water demand in this region and could jeopardize compliance with interstate and international water-sharing agreements.

An infographic summarizing activities of the RAMPS program.
February 4, 2021

Restoration Assessment and Monitoring Program for the Southwest (RAMPS)

A Program of the Southwest Biological Science Center & Ecosystems Mission Area

To subscribe to our newsletter, please visit: https://listserv.usgs.gov/mailman/listinfo/ramps

--

EarthMRI - Lidar Explorer
September 28, 2020

A total of $133,016 will fund new research and preserve important data across the Grand Canyon State.

An infographic summarizing activities of the RAMPS program.
August 10, 2020

This season's edition of the Restoration Assessment and Monitoring Program for the Southwest Newsletter contains recent program highlights including research updates, new projects, field updates and more.

To subscribe to our newsletter, please visit: https://listserv.usgs.gov/mailman/listinfo/ramps

Read more about how the network or RAMPS is enhancing restoration in drylands.

Picture of restoration plantings doing well at an experimental site.
July 22, 2020

RestoreNet is a networked ecological experiment testing restoration treatments across the arid Southwest. Seven experimental sites were installed in the Summer of 2018 on the rangelands of Northern Arizona. The experiments tested seed mixes with various treatments to increase revegetation success (see photos above). These are the results after the first year.

Read more about RestoreNet here.

An infographic summarizing activities of the RAMPS program.
May 18, 2020

This season's edition of the Restoration Assessment and Monitoring Program for the Southwest Newsletter contains recent program highlights including research updates from our RestoreNet experiment, recently awarded funding, field updates and more.

To subscribe to our newsletter, please visit: https://listserv.usgs.gov/mailman/listinfo/ramps

Get the latest updates from RAMPS here.