Lower Mississippi Gulf Water Science Center

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.

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.

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.

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

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. 

This image was taken at the Strong River at D'Lo, Mississippi by Shane Stocks who is a Hydrologic Technician out of the Jackson, MS office. Shane used an infared camera to take this long exposure shot of the river. 

Groundwater or surface water interaction in the Ozark Plateaus aquifer system. Includes examples of thermal imagery used to see groundwater entering streams.

In 1986, Congress directed the USGS to regularly report groundwater-level changes in the High Plains aquifer system. To comply with this directive, the USGS compares water levels measured every two years. By measuring water levels across the entire aquifer in one year, measurements made two years later enable calculation of changes over time. Measured water levels from

Pruitt Buffalo National River