Arizona Water Science Center

Home

Welcome to the U.S. Geological Survey Arizona Water Science Center.  Our mission is to collect and interpret high quality, impartial scientific information to provide resource managers and the public with the knowledge required to understand and manage the critical water resources of Arizona and the Southwest.

Contact the AZWSC

National Water Dashboard

National Water Dashboard

National Water Dashboard - Arizona

Explore real-time streamflow, groundwater, and water-quality conditions in Arizona and across the nation.

Current Conditions

Featured Science

Featured Science

A Century of Watching the Colorado River - A streamgage at Lees Ferry Turns 100 yeard old

Right where the Colorado River flows into the mouth of the Grand Canyon, an inconspicuous 20-foot-high concrete tower rises from the riverbank.  

Read more

News

Date published: September 22, 2021

A Century of Watching the Colorado River

Right where the Colorado River flows into the mouth of the Grand Canyon, an inconspicuous 20-foot-high concrete tower rises from the riverbank.  

Date published: March 10, 2021

USGS Arizona Water Science Center to participate in Colorado River Low Flow event

Is there really more water at the USGS Lees Ferry gaging station than Glen Canyon Dam is releasing just a few miles upstream? That question is probably a lot more important than you might think.

 

Publications

Publication Thumbnail
Year Published: 2021

Assessing potential groundwater-level declines from future withdrawals in the Hualapai Valley, northwestern Arizona

A numerical groundwater flow model of the Hualapai Valley Basin in northwestern Arizona was developed to assist water-resource managers in understanding the potential effects of projected groundwater withdrawals on groundwater levels in the basin. The Hualapai Valley Hydrologic Model (HVHM) simulates the hydrologic system for the years 1935...

Knight, Jacob E.; Gungle, Bruce; Kennedy, Jeffrey R.
Knight, J.E., Gungle, B., and Kennedy, J.R., 2021, Assessing potential groundwater-level declines from future withdrawals in the Hualapai Valley, northwestern Arizona: U.S. Geological Survey Scientific Investigations Report, 63 p., https://doi.org/10.3133/sir20215077.

Publication Thumbnail
Year Published: 2021

Occurrence, fate, and transport of aerially applied herbicides to control invasive buffelgrass within Saguaro National Park Rincon Mountain District, Arizona, 2015–18

The spread of the invasive and fire-adapted buffelgrass (Cenchrus ciliaris L.) threatens desert ecosystems by competing for resources, increasing fuel loads, and creating wildfire connectivity. The Rincon Mountain District of Saguaro National Park addressed this natural resource threat with the use of glyphosate-based herbicides (GBHs). In 2010,...

Paretti, Nicholas V.; Beisner, Kimberly R.; Gungle, Bruce W.; Meyer, Michael T.; Kunz, Bethany K.; Hermosillo, Edyth; Cederberg, Jay R.; Mayo, Justine P.
Paretti, N.V., Beisner, K.R., Gungle, B., Meyer, M.T., Kunz, B.K., Hermosillo, E., Cederberg, J.R., and Mayo, J.P., 2021, Occurrence, fate, and transport of aerially applied herbicides to control invasive buffelgrass within Saguaro National Park Rincon Mountain District, Arizona, 2015–18: U.S. Geological Survey Scientific Investigations Report 2021–5039, 65 p., https://doi.org/10.3133/sir20215039.

Publication Thumbnail
Year Published: 2021

Estimation of dissolved-solids concentrations using continuous water-quality monitoring and regression models at four sites in the Yuma area, Arizona and California, January 2017 through March 2019

Multiple linear regression models were developed to estimate dissolved-solids concentrations in water at four sites in the Yuma area between Imperial Dam, Arizona and California and the southerly international boundary with Mexico at San Luis, Arizona. Continuous and discrete water-quality data were collected at gaging stations in the Colorado...

Cederberg, Jay R.; Paretti, Nicholas V.; Coes, Alissa L.; Hermosillo, Edyth; Andrade, Lucia
Cederberg, J.R., Paretti, N.V., Coes, A.L., Hermosillo, E., Andrade, L., 2021, Estimation of dissolved-solids concentrations using continuous water-quality monitoring and regression models at four sites in the Yuma area, Arizona and California, January 2017 through March 2019: U.S. Geological Survey Scientific Investigations Report 2021–5080, 26 p., https://doi.org/10.3133/sir20215080.