Measuring streamflow on Rock Creek after Hurricane Isaias

Fisseha Mengistu, USGS hydrologic technician, uses a device that lowers a water sampler into the creek below to collect samples used for water quality testing. Experts will be able to use this data to track how Tropical Storm Isaias impacted water quality in the area. This work was done on Rock Creek in Washington, D.C. Real-time data for this water quality site is available here: https://on.doi.gov/3i8yzk5.