Images

View of the Milwaukee, Wisconsin skyline and harbor on a summer day, looking southwest.

Three USGS hydrologists measure streamflow while standing in the middle of an Iowa stream near Fort Dodge, Iowa.

Field office chief Dan Daly smiles for the camera with frost-covered eyelashes while conducting fieldwork on a frigid winter day in Minnesota.

Field office chief Dan Daly and a student hydrologist pull a sled containing water sampling equipment on the frozen Minnesota River in western Minnesota.

Field office chief Dan Daly takes a streamflow measurement through a hole drilled in the frozen Minnesota River in western Minnesota.

Scientist conducting measurement through hole drilled in ice covered surface of the Minnesota River in western Minnesota.

Two scientists stand on the frozen Minnesota River covered in snow conducting fieldwork in western Minnesota.

Hydrologic technician Brett Savage takes a self-portrait with hydrologic technician Scott Adolphson reflected in his snow goggles, while conducting fieldwork in western Minnesota on a snowy winter day in February.

Hydrologic technician Scott Adolphson conducts a streamflow measurement through a hole in a frozen river in western Minnesota, while an ice auger rests in a hole in the ice in the foreground.

Hydrologic technician Scott Adolphson takes a stream discharge measurement through a hole in ice while kneeling on a frozen river in western Minnesota.

U.S. Geological Survey field crew sampling invertebrates at South Branch Rush River, MN.

Hydrologic technician Brett Savage conducts an ice discharge measurement on the Minnesota River in Montevideo, Minnesota.

Mark Sandheinrich and Sean Bailey of the University of Wisconsin - La Crosse sampling fish from a canoe on Shoepack Lake in Voyageurs National Park.

Mark Sandheinrich and Sean Bailey of the University of Wisconsin - La Crosse sampling fish from a canoe on Shoepack Lake in Voyageurs National Park. A burned tree is in the foreground from a previous wildland fire.

West-side of Houghton Lake during winter when frozen showing pressure cracks in ice.

Two passive samplers (mini Semi-Permeable Membrane Devices or “SPMDs”) prior to a onemonth deployment for measurement of organic contaminants.

Effective best management practices have been shown to reduce the transport of sediment, nutrients, herbicides, and pesticides from agriculture to waterways.

Looking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, Wisconsin.

In spite of some very wet weather, this center pivot in southern Wisconsin is running. Irrigation has been growing in the Midwest in recent years and it could be effecting the transport of agricultural chemicals to streams.