Images

Collecting samples (sediment, aquatic vegetation, benthic invertebrates, zooplankton, forage fish, and predatory fish) to evaluate δ 15N ratios in the food web within Liberty Bay to evaluate urbanization effects on the nearshore ecosystem. (Coastal Habitats in Puget Sound program).

Picture of Moraine Lake taken from the south face of South Sister in the Three Sisters Wilderness Area.

2009 Red River flooding in Grand Forks, North Dakota

USGS employees attempt to capture forage fish with the use of a Lampara net in Skagit Bay.

USGS employee Lisa Gee holds a spiny dogfish that she caught while hook and line sampling.

Stream in Shenandoah National Park, Virginia.

Prairie Creek nr. Silver Creek is a tributary of the Platte River. The photo was taken to capture Autumn's colors amplified by water.

This cyanobacteria has radiating filaments and basal heterocysts. Green is DNA stain.

Closeup of Pliocene lignite coal from a Balkan endemic nephropathy (BEN) village in Serbia. Lignite is low rank, or relatively unaltered (soft, or "brown") coal, and is characterized by a brownish color and appearance that often resembles wood. This lignite releases copious amounts of dissolved organic substances into groundwater.

The Vegetation Drought Response Index (VegDRI) incorporates satellite observations of vegetation to monitor at a finer spatial detail than other commonly used drought indicators.

The Bois de Sioux river channel near White Rock, SD.

The Bois de Sioux river channel near White Rock, SD.

Great Lakes water availability studies conducted by the U.S. Geological Survey aim to help characterize how much water the Basin has now, how water availability is changing, and how much water it can expect to have in the future.

Great Lakes water availability studies conducted by the U.S. Geological Survey aim to help characterize how much water the Basin has now, how water availability is changing, and how much water it can expect to have in the future.

Dead molluscs and raccoon tracks are concentrated in cracks in mud in the substrate of a dried-down tidal pond.  Increased frequency and duration of droughts are predicted by some climate models.

Honeycomb weathering of sandstone located on the shores of Puget Sound occurs when expanding salt crystals break fragments of rock, creating a small hole that becomes larger as the process repeats itself over time.

Tide pools provide habitat for a wide variety of Puget Sound flora and fauna.  During low tides, the captive inhabitants of tide pools may be closely inspected. 

This picture was taken during sediment coring field work for a project evaluating atmospheric loading of nutrients to high alpine lakes.

Sunrise on an evapotranspiration-monitoring site in a riparian grassland along the Platte River, Nebraska on September 25, 2007.

Guests arrive at the Elwha Dam for the ceremony commemorating the official start of the dam decommissioning and river restoration project on the Elwha River in Washington state.

USGS river gage at Grand Forks, ND along the Red River of the North has recorded 100 years of data. View of auxiliary gage about 3 miles downstream from base gage.