Crystal Creek Near Rocky Point, OR
![See caption.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/20220701_110134.jpg?itok=UEYxCuRe)
Detailed Description
An acoustic doppler current profiler or ADCP is pulled across the channel by a hydrologic technician using the yellow tagline. An ADCP uses sound waves to measure the speed of currents throughout the water column.
Sources/Usage
Public Domain.