Images

Trask River stage, discharge, and water-quality data are collected and used together to help monitor the current health of the river. Instream equipment is stored in protective housing to protect it from the elements. Data from the river are sent to equipment in the gage house, where it is stored then transmitted to USGS servers.

Nitrate concentrations greater than the Maximum Contaminant Level (MCL) of 10 mg/L as N are predicted to occur primarily in the High Plains, northern Midwest, and areas of intense agriculture in the eastern and western United States.

Atrazine use (left) (left) is one of the most important factors used to predict atrazine and deethylatrazine concentrations in

Experimental laboratory setup to study uranium in aquatic organisms. Bottles contain artificial freshwater amended with dissolved organic matter and a range of uranium concentrations.

USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve, 2015. 

USGS scientist Chris Rowden drives a research vessel measuring streamflow alongside another field crew on the Mississippi River at St. Louis.

USGS hydrologic technician Jayson Blom collects a groundwater-level measurement from an aquifer monitoring well at the Idaho National Laboratory.

USGS scientists Paul Rydlund, Eric Looper and Jason Carron dock the boat and coordinate with emergency managers.

USGS scientists Chris Rowden, Larry Buschmann and Bob Holmes were on the Mississippi River at St. Louis taking streamflow measurements on New Years Eve. This information is critical to the National Weather Service, the U.S. Army Corps of Engineers and emergency managers in making flood predictions and response.

USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve. USGS scientists Eric Looper and Jason Carron are one of many USGS field crews out in the floodwaters over the holiday.

USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve. USGS scientists Eric Looper and Jason Carron are one of many USGS field crews out in the floodwaters over the holiday.

USGS scientists Chris Rowden and Larry Buschmann dock the boat and coordinate with emergency managers.

NBC Nightly News not only came out to interview USGS field crews on the Mississippi, they brought a team to fly overhead and capture video with a drone.

Local CBS 4 affiliate KMOV interviews USGS scientist Paul Rydlund from the Mississippi River in St. Louis.

CNN interviews USGS National Flood Coordinator Bob Holmes live from the Mississippi River in St. Louis.

USGS scientists Chris Rowden, Larry Buschmann and Bob Holmes were on the Mississippi River at St. Louis taking streamflow measurements on New Years Eve. This information is critical to the National Weather Service, the U.S. Army Corps of Engineers and emergency managers in making flood predictions and response.

CNN interviews USGS National Flood Coordinator Bob Holmes live from the Mississippi River in St. Louis.

CNN interviews USGS National Flood Coordinator Bob Holmes live from the Mississippi River in St. Louis.

CNN interviews USGS National Flood Coordinator Bob Holmes live from the Mississippi River in St. Louis.

NBC Nightly News not only came out to interview USGS field crews on the Mississippi, they brought a team to fly overhead and capture video with a drone.

NBC Nightly News not only came out to interview USGS field crews on the Mississippi, they brought a team to fly overhead and capture video with a drone.