Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Below are images associated with the Arizona Water Science Center.
Graphs showing water-year total precipitation and air temperatures in the Lower Colorado River Basin from 1896 to 2019, units modified from millimeters to inches of precipitation and from degrees Celsius to degrees Fahrenheit from: Tillman, F.D., Gangopadhyay, S., and Pruitt, T., 2020, Trends in recent historical and projected climate data for the Colorado River Bas
Graphs showing water-year total precipitation and air temperatures in the Lower Colorado River Basin from 1896 to 2019, units modified from millimeters to inches of precipitation and from degrees Celsius to degrees Fahrenheit from: Tillman, F.D., Gangopadhyay, S., and Pruitt, T., 2020, Trends in recent historical and projected climate data for the Colorado River Bas
Graphs showing mean annual precipitation and air temperature trends in the Lower Colorado River Basin, 1896-2019, published in: Tillman, F.D., Gangopadhyay, S., and Pruitt, T., 2020, Trends in recent historical and projected climate data for the Colorado River Basin and potential effects on groundwater availability: U.S.
Graphs showing mean annual precipitation and air temperature trends in the Lower Colorado River Basin, 1896-2019, published in: Tillman, F.D., Gangopadhyay, S., and Pruitt, T., 2020, Trends in recent historical and projected climate data for the Colorado River Basin and potential effects on groundwater availability: U.S.
Zach Harrison collects a water quality sample at Willow Spring, AZ. Photo courtesy of Kat Cooney, AZ Water Science Center.
Zach Harrison collects a water quality sample at Willow Spring, AZ. Photo courtesy of Kat Cooney, AZ Water Science Center.
Kat Cooney of the Arizona Water Science Center (AZWSC) runs an alkalinity titration in a mobile lab. Photo courtesy of Kat Cooney, USGS.
Kat Cooney of the Arizona Water Science Center (AZWSC) runs an alkalinity titration in a mobile lab. Photo courtesy of Kat Cooney, USGS.
Graphs showing trends in atmospheric precipitation and air temperature in the Lower Colorado River Basin, 1896-2019
Graphs showing trends in atmospheric precipitation and air temperature in the Lower Colorado River Basin, 1896-2019
Kat Cooney stands in front of an outreach table on the Flagstaff USGS campus during the USGS Open House, Nov. 2023.
Kat Cooney stands in front of an outreach table on the Flagstaff USGS campus during the USGS Open House, Nov. 2023.
The USGS Southwest Gravity Program carries out gravity projects for aquifer-storage monitoring and geologic modeling in California, Arizona, and New Mexico. This map shows the location of 24 projects carried out since 2010.
The USGS Southwest Gravity Program carries out gravity projects for aquifer-storage monitoring and geologic modeling in California, Arizona, and New Mexico. This map shows the location of 24 projects carried out since 2010.
As generalized in this image, a gravity measurement is sensitive to a cone-shaped region of the subsurface—as depth increases, the sensitivity to individual water molecules decreases, but the region of sensitivity expands.
As generalized in this image, a gravity measurement is sensitive to a cone-shaped region of the subsurface—as depth increases, the sensitivity to individual water molecules decreases, but the region of sensitivity expands.
Map of study area and location of data collection sites in the Yuma, Arizona, area between Imperial Dam and the southerly international boundary between the United States and Mexico,
Map of study area and location of data collection sites in the Yuma, Arizona, area between Imperial Dam and the southerly international boundary between the United States and Mexico,
Line graph showing modeled continuous dissolved-solids concentration and sampled dissolved-solids concentration at station 09522005 (Colorado River below Cooper wasteway near Yuma, Arizona) and streamflow at station 09522000 (Colorado River at NIB, above Morelos Dam, Arizona) from January 2017 to March 2019.
Line graph showing modeled continuous dissolved-solids concentration and sampled dissolved-solids concentration at station 09522005 (Colorado River below Cooper wasteway near Yuma, Arizona) and streamflow at station 09522000 (Colorado River at NIB, above Morelos Dam, Arizona) from January 2017 to March 2019.
Map of maximum uranium concentration at 206 spring and well sites in the Grand Canyon region.
Map of maximum uranium concentration at 206 spring and well sites in the Grand Canyon region.
Nick Paretti, Arizona Water Science Center (AZWSC), measures water flow at a tributary to the Colorado River in Grand Canyon. Photo courtesy of Kat Cooney, USGS, AZWSC.
Nick Paretti, Arizona Water Science Center (AZWSC), measures water flow at a tributary to the Colorado River in Grand Canyon. Photo courtesy of Kat Cooney, USGS, AZWSC.
This is an image of an extensometer well part of the Tucson Extensometer Well Network. This well is located in Avra Valley, AZ.
This is an image of an extensometer well part of the Tucson Extensometer Well Network. This well is located in Avra Valley, AZ.
Flooding at Vekol Wash today, south of Phoenix, following remnant rains from Hurricane Rosa.
Flooding at Vekol Wash today, south of Phoenix, following remnant rains from Hurricane Rosa.
Small Unmanned Aerial System (UAS) collecting digital photos to create digital elevation models. UAS are an increasingly important tool for monitoring, assessing, and conducting targeted scientific research for the nation.
Small Unmanned Aerial System (UAS) collecting digital photos to create digital elevation models. UAS are an increasingly important tool for monitoring, assessing, and conducting targeted scientific research for the nation.
Chart showing changes in vegetation density in the Mississippi River delta in Louisiana, May 2015-May 2016. From a USGS Open File Report published in July 2017 by co-authors Elijah Ramsey III and Amina Rangoonwala,
Chart showing changes in vegetation density in the Mississippi River delta in Louisiana, May 2015-May 2016. From a USGS Open File Report published in July 2017 by co-authors Elijah Ramsey III and Amina Rangoonwala,
Havasu Creek spilling over Havasu Falls, downstream from Supai Village on the Havasupai Nation.
Havasu Creek spilling over Havasu Falls, downstream from Supai Village on the Havasupai Nation.
Colorado River at Imperial Dam northeast of Yuma, Arizona. Gates in the foreground supply Colorado River water to desilting ponds before being diverted to the All American Canal.
Colorado River at Imperial Dam northeast of Yuma, Arizona. Gates in the foreground supply Colorado River water to desilting ponds before being diverted to the All American Canal.
Trail head sign to Lower Jumpup Spring, north of Grand Canyon.
Trail head sign to Lower Jumpup Spring, north of Grand Canyon.
Photograph showing San Pedro Riparian National Conservation Area, residential development southeast of Sierra Vista, Arizona, and the Huachuca Mountains from Hereford Road, Cochise County, Arizona.
Photograph showing San Pedro Riparian National Conservation Area, residential development southeast of Sierra Vista, Arizona, and the Huachuca Mountains from Hereford Road, Cochise County, Arizona.
Former Kanab North uranium mine on the edge of Kanab Creek, north of Grand Canyon.
Former Kanab North uranium mine on the edge of Kanab Creek, north of Grand Canyon.