Images

Fog along the Yukon River showing a Black Spruce dominated forest in the foreground, which is prone to wildfire.  Photo by Bruce Wylie, USGS

Photo of a mesocosm like that utilized in the study. The rocks are colonized with natural stream communities of aquatic insects. Fresh stream water is circulated through the mesocosm, and individual mesocosms are dosed with different concentrations of a neonicotinoid compound.  

U.S. Geological Survey streamflow-gaging station 08111000 Navasota River near Bryan, Texas, looking upstream from U.S. Highway 190 bridge, August 27, 1975.

SIR 2009–5174

Daniel McCay and Chris Henry, USGS hydrologic technicians, use a level to draw a line on a high-water mark August 26. In most circumstances, when a high-water mark is flagged it would then be surveyed with GPS equipment to obtain its exact coordinates and elevation.

Chris Henry and Daniel McCay, USGS hydrologic technicians, use GPS equipment to survey a high-water mark outside of a flooded elementary school in Denham Springs, Louisiana, August 28. This school was located in one of the hardest hit flood areas and the blue line simulates how high the water was at its peak during this historic flood.

Jonathan Gillip, USGS hydrologist, documents a high-water mark he flagged near a damage retirement community in Denham Springs, Louisiana, August 26. So far, USGS teams have flagged and surveyed more than 400 high-watermarks across southern Louisiana.

Daniel McCay and Chris Henry, U.S. Geological Survey hydrologic technicians, search a neighborhood south of Denham Springs, Louisiana, for high-water marks August 26. The term high-water mark refers to the debris flood waters will leave on walls, buildings and trees.

Adam Starke (left of AUV) of The Nature Conservancy and Lee Bodkin (right of AUV) retrieve the Autonomous Underwater Vehicle from it's mission mapping the Bergen Point

USGS employees survey at USGS gage 9421500 Colorado River below Hoover Dam AZ/NV

USGS Scientists launching an autonomous underwater vehicle (AUV)

Flow along 4H Club Rd under I-12 on August 15, 2016.

The view on South Sherwood Forest Blvd near the USGS Louisiana Water Science Center office on August 15, 2016.

A flooded house near the confluence of the Comite and Amite Rivers near Denham Springs, LA.

A flooded neighborhood near the confluence of the Comite and Amite Rivers near Denham Springs, LA. 

Backwater flooding across Florida Blvd near the Amite River Bridge in Denham Springs, LA.

The Bronx River has been straightened as it flows by a street in New York City. The Bronx River was one of many streams sampled in the Northeastern U.S. as part of the Regional Stream Quality Assessments (RSQA).

USGS scientists prepare water-quality instruments before going out on the Great Salt Lake. USGS scientists are conducting a study to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists conducting a study on the Great Salt Lake to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists conducting a study on the Great Salt Lake to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists use multiple high-frequency water quality instruments contained in a cage to measure nutrients and algal changes in surface water. Scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

Physical Scientist, Pete Lenaker, collecting a water column microplastic sample while measuring water velocity at streamgage 040870837 MENOMONEE RIVER AT RIDGE BLVD AT WAUWATOSA, WI.