Images

Algae growing over the rocky streambank of the south fork of the Shenandoah River near Lynnwood, Virginia.

This photo was taken as a part of the Shenandoah River HABs Project.

A USGS scientist servicing a rail system along the banks of the North Fork Shenandoah River near Strausburg. Rail systems are used to deploy continuous water chemistry monitoring equipment in large rivers such as the Shenandoah.

Algae growing in a backwater section along the streambank of the south fork of the Shenandoah River near Lynnwood, Virginia.

This photo was taken as a part of the Shenandoah River HABs Project.

Algae growing along a backwater section along the streambank of the south fork of the Shenandoah River near Lynnwood, Virginia.

This photo was taken as a part of the Shenandoah River HABs Project.

North Fork Shenandoah River during a Harmful Algal Bloom (HAB) event. 

This photo was taken near Town Park in Strausburg, and is a part of the Shenandoah River HABs Project.

Deer Rapids, on the North Fork of the Shenandoah River in Virginia, after a harmful algal bloom (HAB) event. Note how the dark greenish-brown, dead or dying filamentous algae still coats the riverbed.

Data for this monitoring site can be found at USGS Water Data for the Nation.

USGS scientist Carly Maas observing a harmful algal bloom (HAB) event along the Shenandoah River North Fork.

This photo was taken as a part of the Shenandoah River HABs Project.

Water quality monitoring sensors attached to a rail system along the banks of the North Fork Shenandoah River near Strausburg. Rail systems are used to deploy continuous water chemistry monitoring equipment in large rivers such as the Shenandoah.

War Branch is a creek in Rockingham County, Virginia. Its 11 square mile watershed includes mostly poultry and beef agricultural activities. This stream is a part of the Chesapeake Bay Small Agricultural Watershed Monitoring Program. 

Aerial photograph of the South Fork of the Shenandoah River near Rileyville, Virginia.

A USGS scientist deploys a pair of floating oxygen exchange sensors into the North Fork Shenandoah River. Oxygen exchange rate is an important component in calculating metabolism.

View from bridge at USGS streamgage (station ID: 01634000) of North Fork of the Shenandoah River after a rainstorm.

Winter 2024 Photo Contest: James Webber, Honorable Mention category

The inside of a USGS mobile laboratory vehicle. Water quality samples collected in the field are pre-processed in the mobile lab shortly after collection, then stored on ice before they are transported to and processed at a full water-quality laboratory.

The USGS monitoring station 01634000 on the North Fork Shenandoah River near Strausburg.

This photo was taken as a part of the Shenandoah River HABs Project.

Display screen of a forward-looking infrared (FLIR) camera being used to measure water temperature along the North Fork of the Shenandoah River. Cooler colors indicate lower temperatures, and colder temperatures can indicate spring or groundwater inputs to the river.

North Fork Shenandoah River during a Harmful Algal Bloom (HAB) event. 

This photo was taken near Town Park in Strausburg, and is a part of the Shenandoah River HABs Project.

USGS scientist Carly Maas using a forward-looking infrared (FLIR) camera to measure water temperature along the North Fork of the Shenandoah River. Colder temperatures can indicate spring or groundwater inputs to the river.

Mt. Jackson Monitoring Station, located along the North Fork Shenandoah River. 

This photo was taken as a part of the Shenandoah River HABs Project.

Inside the Mt. Jackson monitoring site building.

This photo was taken as a part of the Shenandoah River HABs Project.

A harmful algal bloom (HAB) event in the North Fork Shenandoah River near Strausburg. Algae can be seen floating at the surface in mats, while filamentous algae coats the riverbed below the surface.

Deer Rapids, on the North Fork of the Shenandoah River in Virginia, during a harmful algal bloom (HAB) event. Note how green, filamentous algae coats the riverbed.

Data for this monitoring site can be found at USGS Water Data for the Nation.