Images

Photograph of the reference reach on the South Platte River in Denver, Colorado.

Photograph of the Elitch Gardens reach on the South Platte River in Denver, Colorado.

Photograph of USGS employees, Ethan Newman and Katherine Curran, collecting a depth-integrated, water sample from the photic zone (the layer of water that receives sunlight) using a modified pool hose. Lily Delmarsh (bottom right) is preparing to measure the transparency of the water using a secchi disk.​​​

Photograph of USGS employees, Ethan Newman, Katherine Curran, and Lily Delmarsh, driving a boat on Grand Lake.

USGS 09013900 Grand Lake at Grand Lake, CO

Photograph of USGS employees, Lily Delmarsh and Katherine Curran, collecting a water chemistry sample with a Kemmerer sampler. 



USGS 4013311005501401 – Shadow Mountain Lake near Midlake near Grand Lake, Colorado

Image illustrating typical camera installation, obtained at 393259107194801, Colorado River above Roaring Fork River at Glenwood Springs, CO.

The Berthoud Pass Meteorological Station, Colorado, in March 2023 with peak snowpack conditions. This site is collocated with an NRCS SNOTEL station to compare sensor capabilities and methods.

Groundwater level elevations within the mine workings (indicated by the red dotted lines) and within crystalline bedrock outside the mine workings (indicated by the blue dotted lines) are substantially different from one another.

At 12,160 feet, Senator Beck Meteorological Station, Colorado, is one of the higher elevation alpine sites in the network and shows the large amount of snow at these high-altitude catchment environments, as well as sublimation and wind redistribution of snow, a potentially important area to measure for water availability forecasting.

Will McDermott, a physical scientist with the USGS Colorado Water Science Center, working during site visit to Eagle Creek.

Will McDermott, a physical scientist with the USGS Colorado Water Science Center, working his way across the snow during a site visit at Eagle Creek.

Map showing study reaches and approximate extent of restoration efforts on the South Platte River in Denver, Colorado.

Because of thermal contrasts between inflowing groundwater and streams, USGS scientists use thermal infrared cameras to identify zones of groundwater discharge, as seen in this photograph.

Sodium fluorescein dye injection into the Slate River used to measure how much groundwater flows into it. 

USGS scientists injected a non-toxic fluorescent dye into the Slate River to identify zones of groundwater discharge. 

Aerial photographs of study reaches on the South Platte River in Denver, Colorado. 

Aerial photograph of study reaches on the South Platte River in Denver, Colorado.

Contrasting conditions on the Colorado and Roaring Fork Rivers at streamgage 393259107194801, Colorado River above Roaring Fork River at Glenwood Springs, CO.

Map showing helicopter survey area and near Granby, Colo. Surveys will not occur directly above populated areas. Black circle indicates study area.

USGS employee, Caleb Schraeder, in cableway over the Sacramento River above Bend Bridge near Red Bluff, CA.

The namesake of the City of Steamboat Springs was once a geyser. Now the spring upwells into a large pool before flowing out to the Yampa River.