Photograph of Gary Graves for his Staff Profile. He works for Oklahoma-Texas Water Science Center
Images
Photograph of Gary Graves for his Staff Profile. He works for Oklahoma-Texas Water Science Center

Map showing principal aquifers (PAs) and wells that were sampled as part of a Nationwide assessment of the quality of groundwater used for public supply.
Map showing principal aquifers (PAs) and wells that were sampled as part of a Nationwide assessment of the quality of groundwater used for public supply.
Thick vegetation at a Guymon, Oklahoma, site required parking a quarter-mile away. The pickup is visible at the top center of the photo, which was taken on November 11, 2021, the first characterization day there. (Photo by Jeff Irwin, USGS)
Thick vegetation at a Guymon, Oklahoma, site required parking a quarter-mile away. The pickup is visible at the top center of the photo, which was taken on November 11, 2021, the first characterization day there. (Photo by Jeff Irwin, USGS)

View downstream from the bridge at USGS site 07241520, North Canadian River at Britton Rd at Oklahoma City, OK
View downstream from the bridge at USGS site 07241520, North Canadian River at Britton Rd at Oklahoma City, OK

Rafts, kayaks, and canoes on the Illinois River near Moodys, Oklahoma, (station 07196320) on a busy summer Saturday during the peak of the recreational floating season
linkRafts, kayaks, and canoes pass downstream of the Illinois River Floatcam on the Illinois River near Moodys, Oklahoma, (station 07196320) on a busy summer Saturday during the peak of the recreational floating season. The Illinois River Floatcam is located at USGS station 0719
Rafts, kayaks, and canoes on the Illinois River near Moodys, Oklahoma, (station 07196320) on a busy summer Saturday during the peak of the recreational floating season
linkRafts, kayaks, and canoes pass downstream of the Illinois River Floatcam on the Illinois River near Moodys, Oklahoma, (station 07196320) on a busy summer Saturday during the peak of the recreational floating season. The Illinois River Floatcam is located at USGS station 0719

Photograph showing USGS employees on State Highway 104 near the Arkansas River near Haskell, Oklahoma, streamgage (07165570). Photograph by Kevin Smith, U.S. Geological Survey.
U.S. Geological Survey Open-File Report 2020–1090
Photograph showing USGS employees on State Highway 104 near the Arkansas River near Haskell, Oklahoma, streamgage (07165570). Photograph by Kevin Smith, U.S. Geological Survey.
U.S. Geological Survey Open-File Report 2020–1090
Oklahoma has the largest Native American population of any state. Many of the 250,000 American Indians living in Oklahoma are descended from the original 67 tribes who inhabited Indian Territory. Oklahoma is tribal headquarters for 39 tribes.
Capital Oklahoma City
Image Source Landsat 8
Oklahoma has the largest Native American population of any state. Many of the 250,000 American Indians living in Oklahoma are descended from the original 67 tribes who inhabited Indian Territory. Oklahoma is tribal headquarters for 39 tribes.
Capital Oklahoma City
Image Source Landsat 8

Sampling rain induced runoff from wastewater effluent-irrigated agricultural runoff site on August 30, 2019, at the Oklahoma State University South Central Research Station in Chickasha, Oklahoma. Photograph by Jason Masoner, U.S. Geological Survey.
linkThis photo show runoff from an experimental plot through a weir. Scientists carried out the study at the Oklahoma State University South Central Research Station in Chickasha, Oklahoma. Its a good example of rain induced runoff.
Sampling rain induced runoff from wastewater effluent-irrigated agricultural runoff site on August 30, 2019, at the Oklahoma State University South Central Research Station in Chickasha, Oklahoma. Photograph by Jason Masoner, U.S. Geological Survey.
linkThis photo show runoff from an experimental plot through a weir. Scientists carried out the study at the Oklahoma State University South Central Research Station in Chickasha, Oklahoma. Its a good example of rain induced runoff.
Looking downstream from U.S. Highway 62 bridge at the widespread flooding and backwater conditions on the Arkansas River near Muskogee, Oklahoma, May 31, 2019.
U.S. Geological Survey Open-File Report 2020–1090
Looking downstream from U.S. Highway 62 bridge at the widespread flooding and backwater conditions on the Arkansas River near Muskogee, Oklahoma, May 31, 2019.
U.S. Geological Survey Open-File Report 2020–1090
A direct streamflow measurement from the State Highway 20 bridge, looking downstream on the Verdigris River near Claremore, Oklahoma, near U.S. Geological Survey streamgage 07176000.
U.S. Geological Survey Open-File Report 2020–1090
A direct streamflow measurement from the State Highway 20 bridge, looking downstream on the Verdigris River near Claremore, Oklahoma, near U.S. Geological Survey streamgage 07176000.
U.S. Geological Survey Open-File Report 2020–1090
This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.
This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.
View from bridge of USGS gage 07241800, North Canadian River at Shawnee, OK
View from bridge of USGS gage 07241800, North Canadian River at Shawnee, OK
Rafters enjoy the floating down the Illinois River in northeast Okalahoma.
Rafters enjoy the floating down the Illinois River in northeast Okalahoma.
Tonkawa Geoprobing 052517
Chikaskia River at Tonkawa, OK
Chikaskia River at Tonkawa, OK
Geoprobe fieldwork at Tonkawa, OK
Geoprobe fieldwork at Tonkawa, OK
Groundwater-monitoring well and telemetry equipment in Osage County, Oklahoma
Groundwater-monitoring well and telemetry equipment in Osage County, Oklahoma
Pine Creek near Moyer, OK

Landsat's shortwave infrared (SWIR) band measures reduced moisture content in soil and vegetation. When combined with its near-infrared (NIR) band, which helps reveal actively growing vegetation, Landsat produces highly accurate images and maps of burned areas.
Landsat's shortwave infrared (SWIR) band measures reduced moisture content in soil and vegetation. When combined with its near-infrared (NIR) band, which helps reveal actively growing vegetation, Landsat produces highly accurate images and maps of burned areas.

This March 2017 Landsat 8 image shows massive burned scars in Kansas and Oklahoma. More than 730,000 acres of farm and ranchland were scorched by wind-driven wildfires that began March 6 and were finally extinguished on March 22.
This March 2017 Landsat 8 image shows massive burned scars in Kansas and Oklahoma. More than 730,000 acres of farm and ranchland were scorched by wind-driven wildfires that began March 6 and were finally extinguished on March 22.