Images

FIG. 1. Study area, climate station locations, U.S. Environmental Protection Agency (EPA)-defined North America Level III ecoregions (ecoregions), and California Department of Water Resources (CDWR) full natural flow (FNF) hydrological basins.

Lees Ferry streamgage and cableway downstream on the Colorado River, Arizona

Photograph of hydrologists measuring gradient self-potential, water temperature, specific conductance, and nitrate concentrations were measured along a 123 km reach in the upper Delaware River between Hancock and Port Jervis, New York in summer 2021. Data collected during this campaign are available at: https://doi.org

USGS staff measuring discharge at the Solomon Gulch Hydropower tailrace, Valdez Alaska.

The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows a daily snapshot of water-level statistics in the network for May 2021.

Rain Gauge installed after the 2020 Grizzly Creek fire in Glenwood Canyon, Colorado. Scientists installed a network of rain gauges and soil moisture sensors throughout the rugged burn area. These instruments provide real-time data on rainfall intensity and duration, which are critical factors in determining the likelihood of a debris flow. 

The Region 1, May 2021 "USGS at Work" Winner (by Aaron Stephens)

The Region 1, May 2021 "Where We Work" Winner (by Ian Lynch)

The Region 1, May 2021 "Honorable Mention #1" Winner (by Chelsea Delsack)

 A USGS scientist wearing black gloves is collecting a sample of tap water from the kitchen sink using small plastic vials to test for PFAS.

Colorado River outside of Canyonlands National Park, La Sal Mountains in the background.

The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows a daily snapshot of water-level statistics in the network for April 2021.

Technician Checking a Trap for Salamanders

The Region 1, May 2021 "Honorable Mention #2" (by Jill Fleming)

This illustration is part of the From Snow to Flow data visualization story.

The Region 1, April 2021 "Honorable Mention #1" Winner (by Chelsea Delsack)

In this photo, USGS scientist Julia David is taking field notes while out measuring groundwater levels in an irrigation well in the Walla Walla River Basin in April 2021.

The Region 1, April 2021 "Honorable Mention #2" Winner (by Bonnie McDevitt)

The Region 1, April 2021 "USGS at Work" Winner (by Alex Olson)

The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows snapshots of water-level statistics in the network during March 2021.

A long exposure shot shows the flow and direction of water through the gage pool during a high-flow event in April 2021. Looking upstream you can see the staff plate and a felled tree which is not impacting flow.

Floodwaters draining into the mouth of Lost Creek Cave, Lost Creek State Natural Area, Tennessee