Substrate mapping on Little North Santiam
![Scientist in a kayak on river channel with cobbles visible through clear greenish water. Background is a steep canyon wall.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/05-or-06-alt_Little-North-Santiam_IMG_2130_Overstreet_adj.jpg?itok=WFNSx673)
Detailed Description
River bed-sediment size and distribution is critical for fish spawning habitat. The kayaking scientist in this photo is towing an advanced acoustic instrument that measures river velocity and depth. In addition, a camera captures photos that can be used to create digital elevation models and eventually maps of river bed-sediment size.
Sources/Usage
Public Domain.