Images

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

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.

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.

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.

A lower Columbia River estuary tour on a USGS research vessel with NWA Deputy REx and WFRC Director.

The Souris River at Westhope, North Dakota. The top photos taken on April 26, 1970, with a discharge of 1,110 cfs. And the bottom photo taken on April 19, 2011, with a discharge of 13,300 cfs and a gage height of 19.82 feet.

The Little Missouri River at Medora, North Dakota. Top photo taken by a USGS personnel in March of 1972, while the Little Missouri River was flooding the camp sites at Medora, ND. The bottom photo was taken by USGS Colton Rupp on May 24, 2011, with a discharge of 32,000 cfs and a gage height of 19.42 feet.

Stream in Great Smoky Mountains National Park.

Stream near Pocosin weather station site, Shenandoah National Park.

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.

The ochre sea star is a common starfish found along the shores of Puget Sound.  This intertidal dweller feeds primarily on mussels and snails, and may live as long as twenty years.

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. 

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.

Researchers are installing an underwater microscope on the R/V Theodore H. Schmudde.

Buoys are attached to trotlines deployed in the Lower Missouri River.

Biologists study Pallid Sturgeon in the Lower Missouri River.

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

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.