In partnership with the Flood Control District of Maricopa County and as part of the Urban Waters Federal Partnership, the US Geological Survey is collecting water-quality and water-level data to help characterize the shallow groundwater and surface water along the Lower Gila River. Water sampling and continuous monitoring of specific conductance, surface water, and shallow groundwater level...

Arizona Water Science Center

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October 27, 2021

Urban Waters Federal Partnership – Groundwater and Surface Water Characterization of the Lower Gila River for the Rio Salado Project

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December 4, 2020

Water Quality Data from Select Spring and Stream Sites and Water and Sediment Quality Data from the Colorado River and Major Tributaries in Grand Canyon, Northern Arizona (ver. 2.0, April 2024)

This USGS Data Release represents water and sediment quality data collected in the Grand Canyon region of northern Arizona. There are 4 separate datasets associated with this Data Release: Water quality data from major Colorado River tributary monitoring sites in and near Grand Canyon from 2015 through 2022. Sediment quality data from the Colorado River and major tributary monitoring sites in an

Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Arizona Water Science Center

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January 1, 2021

An assessment of uranium in groundwater in the Grand Canyon region

The Grand Canyon region in northern Arizona is a home or sacred place of origin for many Native Americans and is visited by over 6 million tourists each year. Most communities in the area depend upon groundwater for all water uses. Some of the highest-grade uranium ore in the United States also is found in the Grand Canyon region. A withdrawal of over 1 million acres of Federal land in the Gran

Authors

Fred D. Tillman, Kimberly R. Beisner, Jessica R. Anderson, Joel A. Unema

Ecosystems Mission Area, Water Resources Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Arizona Water Science Center, New Mexico Water Science Center

November 4, 2020

Assessing uranium and select trace elements associated with breccia pipe uranium deposits in the Colorado River and main tributaries in Grand Canyon, USA

Assessing chemical loading from streams in remote, difficult-to-access watersheds is challenging. The Grand Canyon area in northern Arizona, an international tourist destination and sacred place for many Native Americans, is characterized by broad plateaus divided by canyons as much as two-thousand meters deep and hosts some of the highest-grade uranium deposits in the U.S. From 2015–2018 major su

Authors

Fred D. Tillman, Jessica R. Anderson, Joel A. Unema, Thomas Chapin

Ecosystems Mission Area, Water Resources Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Arizona Water Science Center, Geology, Geophysics, and Geochemistry Science Center

June 30, 2020

Rethinking groundwater flow on the South Rim of the Grand Canyon, USA: Characterizing recharge sources and flow paths with environmental tracers

In the arid landscape south of the Grand Canyon, natural springs and seeps are a critical resource for endemic species and Native American tribes. Groundwater is potentially threatened by expanding populations, visitations, and mineral extraction activities. Environmental tracers including noble gases, stable isotopes of hydrogen and oxygen in water, tritium, and carbon-14 were used to characteriz

Authors

John E. Solder, Kimberly R. Beisner, Jessica R. Anderson, Donald J. Bills

Water Resources Mission Area, Arizona Water Science Center, New Mexico Water Science Center, Utah Water Science Center

June 18, 2020

Geochemical characterization of groundwater evolution south of Grand Canyon, Arizona (USA)

Better characterization of the geochemical evolution of groundwater south of Grand Canyon, Arizona (USA), is needed to understand natural conditions and assess potential effects from breccia-pipe uranium mining in the region. Geochemical signatures of groundwater at 28 sampling locations were evaluated; baseline concentrations for select trace elements (As, B, Ba, Cr, Li, Mo, Rb, Se, Sr, Th, Tl, U

Authors

Kimberly R. Beisner, John E. Solder, Fred D. Tillman, Jessica R. Anderson, Ronald C. Antweiler

Water Resources Mission Area, Arizona Water Science Center, Utah Water Science Center

January 1, 2015

New information and guidance for collapsible bag-type sediment samplers

Answers for many critical water-related issues require solid-phase water-quality data that are representative, accurate, and consistent. Collection of suspended sediment samples for subsequent analyses of solid-phase constituents that represent water-column sediment concentrations requires use of appropriate isokinetic samplers and sampling techniques (Davis, 2005a). Recent review of field and lab

Authors

Mark N. Landers, Thomas A. Sabol, Michael A. Manning, Jessica R. Anderson, Corey Sannes

Water Resources Mission Area