Images

Hydrologic technician Garret Welsh carries a large ice auger while walking across the frozen St. Croix river near streamgage 05341550 in Stillwater, Minnesota.

Hydrologic technician Garret Welsh conducts an Ice Rod measurement through an augered hole in the frozen St. Croix river near streamgage 05341550 in Stillwater, Minnesota. An Ice Rod is a heavy-duty, 1-inch (2.5 centimeter) diameter, lightweight aluminum rod used for suspending ice meters in fast velocities.

Scientists at the U.S. Geological Survey Upper Midwest Environmental Sciences Center and the U.S.

The left axis is a visualization of an ensemble of solutions (crosses and dashed lines) iteratively moving down gradient on an objective function surface (color flood) in 2-D parameters space, with the associated prior (gray) and posterior (blue) parameter marginal distributions shown on the two right stacked axes.

Bridge over channel between Fence Lake and Big Crawling Stone Lake in Lac du Flambeau Chain of Lakes, Wisconsin

Researchers instruct volunteers on how to collect dragonfly larvae in Glacier NP as a part of the Dragonfly Mercury Project.

Hydrologic Technician Matt Bach measuring streamflow day after a rain event at USGS streamgage 04085078, DUTCHMAN CREEK AT HANSEN RD AT ASHWAUBENON, WI, using an Acoustic Doppler Current Profiler (ADCP). The ADCP measures water currents by transmitting "pings" of sound at a constant frequency into the water.

A USGS hydrologic technician finishes installation of a rapid-deployment streamgage at Gordonville Road on the Tittabawassee River in Midland, Michigan.

USGS National Wildlife Health Center pathologist examines a cottontail for cause-of-death determination.

This image shows a GLRI nutrient sampler submerged during major flooding on the Rifle River, Michigan, in May 2020. This site is near the Rifle River Near Sterling USGS streamgage.

Lab Instrumentation used for target analyses at the OGRL at the KS WSC. Image is of part of the Instrument Laboratory. 

In this photo, USGS scientists Megan Haserodt (Hydrologist) and Jenelle Wempner (Student Intern) install a double ring infiltrometer along a recreated floodplain of Underwood Creek, a tributary to the Milwaukee River and Lake Michigan in Milwaukee, Wisconsin.

These images show grass carp larvae from the Maumee River. Characteristics of larval grass carp include overall length (left), skeletal muscle development (center) and presence of an eye spot that lacks pigmentation (right; pigment starting to develop on lower eye).

Durand streamgage mounted to bridge - looking downstream.

View from Durand bridge of boat crew conducting multibeam surveys

Hydrologic Technician using crane to collect a bedload sample from the bridge.

A hypothetical configuration of one of the two drained field sites, including a weather station for measuring climate data, a piezometer network for continuous water level measurements, soil moisture probes, and subsurface drainage flow. The third undrained field site will have a similar configuration, with the absence of subsurface drainage flow.

Map of dissolved oxygen and turbidity along the Milwaukee River.

These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science.

Canada geese in large numbers can contribute fecal contamination to waterbodies.

Ephemeral wetlands at Glacial Ridge National Wildlife Refuge

Sediment core sample taken at Grubers Grove Bay on the Wisconsin River, Wisconsin.