Unified Interior Regions

Region 8: Lower Colorado Basin

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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

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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.

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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...

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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.

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Year Published: 2021

Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6—Structure from motion workflow documentation

IntroductionStructure from motion (SFM) has become an integral technique in coastal change assessment; the U.S. Geological Survey (USGS) used Agisoft Metashape Professional Edition photogrammetry software to develop a workflow that processes coastline aerial imagery collected in response to storms since Hurricane Florence in 2018. This report...

Over, Jin-Si R.; Ritchie, Andrew C.; Kranenburg, Christine J.; Brown, Jenna A.; Buscombe, Daniel D.; Noble, Tom; Sherwood, Christopher R.; Warrick, Jonathan A.; Wernette, Phillipe A.
Over, J.R., Ritchie, A.C., Kranenburg, C.J., Brown, J.A., Buscombe, D., Noble, T., Sherwood, C.R., Warrick, J.A., and Wernette, P.A., 2021, Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6—Structure from motion workflow documentation: U.S. Geological Survey Open-File Report 2021–1039, 46 p., https://doi.org/10.3133/ofr20211039.

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Year Published: 2021

A survey of storm-induced seaward-transport features observed during the 2019 and 2020 hurricane seasons

Hurricanes are known to play a critical role in reshaping coastlines, but often only impacts on the open ocean coast are considered, ignoring seaward-directed forces and responses. The identification of subaerial evidence for storm-induced seaward transport is a critical step towards understanding its impact on coastal resiliency. The visual...

Over, Jin-Si R.; Brown, Jenna A.; Sherwood, Christopher R.; Hegermiller, Christie; Wernette, Phillipe Alan; Ritchie, Andrew C.; Warrick, Jonathan

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Year Published: 2021

Landscape evolution in eastern Chuckwalla Valley, Riverside County, California

This study investigates sedimentary and geomorphic processes in eastern Chuckwalla Valley, Riverside County, California, a region of arid, basin-and-range terrain where extensive solar-energy development is planned. The objectives of this study were to (1) measure local weather parameters and use them to model aeolian sediment-transport potential...

East, Amy E.; Gray, Harrison J.; Redsteer, Margaret Hiza; Ballmer, Matthew
East, A.E., Gray, H.J., Redsteer, M.H., and Ballmer, M., 2021, Landscape evolution in eastern Chuckwalla Valley, Riverside County, California: U.S. Geological Survey Scientific Investigations Report 2021–5017, 46 p., https://doi.org/10.3133/sir20215017.

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Year Published: 2021

The impacts of the 2015/2016 El Niño on California's sandy beaches

The El Niño Southern Oscillation is the most dominant mode of interannual climate variability in the Pacific. The 2015/2016 El Niño event was one of the strongest of the last 145 years, resulting in anomalously high wave energy across the U.S. West Coast, and record coastal erosion for many California beaches. To better manage coastal resources,...

Smith, Schuyler A; Barnard, Patrick L.

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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.

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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

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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.

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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:

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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

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Tamarisk growing along a river
April 22, 2006

A single species stand of nonnative tamarisk

Single species stand of nonnative tamarisk on the Lower Colorado River at Cibola National Wildlife Refuge, California

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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

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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

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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.