Images

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.

Souris River above Minot, North Dakota.

Diatoms are algae that reflect the biotic condition of streams, lakes and estuaries. Diatoms are important indicator organisms because they are sensitive to natural and human impacts, and monitoring their condition provides information about ecosystem health. A large, living Pleurosira laevis cell has many disc shaped chloroplasts.

Biologist holding a flathead catfish caught by trammel net in the Lower Missouri River.

Hydrogeologists examining the Garber-Wellington aquifer and Hennessey Shale confining unit contact near Arcadia Lake, Oklahoma.

Retrieving a trotline on the Lower Missouri River in March 2011.

Open weir at Apple Creek near Menoken, North Dakota. Flow is 36.7 cubic feet per second.

An excessive amount of weeds flows down North New River.

Scientist measures the profile of a tidal creek at low tide.  Note mudflat in background.

Conducting a reconnaissance of a salt marsh-lined tidal creek.

Spring Rain at Hart Mountain.

Deploying a datalogger in the middle of Harney Lake.

Storm clouds moving in over the park.

USGS Oregon Water Science Center research vessel, used for lower Columbia River estuary water quality/contaminant and aquatic ecosystem health.

This photo of the Veazie Dam on the Penobscot River was taken just before the dam was breached for removal. This perspective shows the challenge the dam posed to wildlife navigating the river. 

Comparison of satellite images of Mendenhall Glacier (Left - Landsat 5, Aug. 17, 1984; Right - Landsat 8, May 16, 2014).

Pedernales River at Hamilton Pool Crossing after September 1952 flood. Trees destroyed by flood of September 11, 1952.  Discharge of Pedernales River near Spicewood, TX (USGS station 08154000) was 452,000 cfs.

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.

Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin.

Baldcypress forest along the banks of Rainey Lake, remnant of a dwindling habitat that is being studied by scientists at the NWRC.

This picture was taken at our juvenile Chinook tagging shed (old town Sacramento) looking upstream at our release location for our study.