USGS hydrologist using velocity rod to estimate streamflow
![USGS hydrologist using velocity rod to estimate streamflow](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/IMG_0032.jpg?itok=umX2QZGc)
Detailed Description
A USGS hydrologist uses a velocity rod to estimate streamflow as part of a project to develop methods for monitoring streamflow in remote headwater streams.
Sources/Usage
Public Domain.