A USGS scientist takes a sample from a northern pintail duck (Anas acuta) to be tested for avian influenza.
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Testing for Avian Influenza
A USGS scientist takes a sample from a northern pintail duck (Anas acuta) to be tested for avian influenza.
Stream gage house at Little Menomonee River near Freistadt
Stream gage house at Little Menomonee River near FreistadtStream gage house at Little Menomonee River near Freistadt (04087050), during high water.
Stream gage house at Little Menomonee River near Freistadt
Stream gage house at Little Menomonee River near FreistadtStream gage house at Little Menomonee River near Freistadt (04087050), during high water.
Milwaukee Skyline and River
View looking southwest, towards Milwaukee, Wisconsin skyline and harbor on a summer day.
View looking southwest, towards Milwaukee, Wisconsin skyline and harbor on a summer day.
Milwaukee skyline and harbor
View of the Milwaukee, Wisconsin skyline and harbor on a summer day, looking southwest.
View of the Milwaukee, Wisconsin skyline and harbor on a summer day, looking southwest.
Grey Tree Frog
Grey Tree Frog
Black newly applied sealcoat contrasts with unsealed asphalt
Black newly applied sealcoat contrasts with unsealed asphaltNewly applied coal-tar-based sealcoat is dark black, sharply contrasting with the unsealed asphalt parking lot below. Coal-tar-based sealcoat is a potent source of polycyclic aromatic hydrocarbons (PAHs).
Black newly applied sealcoat contrasts with unsealed asphalt
Black newly applied sealcoat contrasts with unsealed asphaltNewly applied coal-tar-based sealcoat is dark black, sharply contrasting with the unsealed asphalt parking lot below. Coal-tar-based sealcoat is a potent source of polycyclic aromatic hydrocarbons (PAHs).
Worn sealcoat in Milwaukee, WI
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Black sealcoat contrasts with unsealcoated asphalt on parking lot
Black sealcoat contrasts with unsealcoated asphalt on parking lotSealcoat, marketed to protect and beautify the underlying asphalt, sharply contrasts here with the light gray of unsealcoated asphalt pavement. Read more about coal-tar-based sealcoat and PAHs here.
Black sealcoat contrasts with unsealcoated asphalt on parking lot
Black sealcoat contrasts with unsealcoated asphalt on parking lotSealcoat, marketed to protect and beautify the underlying asphalt, sharply contrasts here with the light gray of unsealcoated asphalt pavement. Read more about coal-tar-based sealcoat and PAHs here.
Worn sealcoat around a storm drain.
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Sealcoat wear indicated by bare asphalt patches
The abrasive action of car tires and snow plows causes sealcoat to wear off. Here, light-colored patches indicate where the sealcoat has worn off and the underlying asphalt shows through.
The abrasive action of car tires and snow plows causes sealcoat to wear off. Here, light-colored patches indicate where the sealcoat has worn off and the underlying asphalt shows through.
Two mini SPMDs prior to deployment
Two passive samplers (mini Semi-Permeable Membrane Devices or “SPMDs”) prior to a onemonth deployment for measurement of organic contaminants.
Two passive samplers (mini Semi-Permeable Membrane Devices or “SPMDs”) prior to a onemonth deployment for measurement of organic contaminants.
USGS Scientist Mark Roth listening to frog calls.
USGS Scientist Mark Roth listening to frog calls. Coolecting frog calls allows scientists to determine distribution of species.
USGS Scientist Mark Roth listening to frog calls. Coolecting frog calls allows scientists to determine distribution of species.
Best management practices of agricultural streams
Effective best management practices have been shown to reduce the transport of sediment, nutrients, herbicides, and pesticides from agriculture to waterways.
Effective best management practices have been shown to reduce the transport of sediment, nutrients, herbicides, and pesticides from agriculture to waterways.
USGS Scientist Kevin Kenow looks out over lake at dawn.
USGS Scientist Kevin Kenow looks out over lake at dawn.USGS Scientist Kevin Kenow looks out over lake at dawn.
USGS Scientist Kevin Kenow looks out over lake at dawn.
USGS Scientist Kevin Kenow looks out over lake at dawn.USGS Scientist Kevin Kenow looks out over lake at dawn.
Upper Midwest Environmental Sciences Center
Upper Midwest Environmental Sciences Center
Upper Midwest Environmental Sciences Center
Looking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, Wisconsin
Looking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, WisconsinLooking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, Wisconsin.
Looking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, Wisconsin
Looking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, WisconsinLooking towards Long Interlaken Lake from Flambeau Lake on a kayak in Lac du Flambeau Chain of Lakes, Wisconsin.