survey quad-collette Johnson-usfws.jpg

Photo By/Credit
Collette Johnson/USFWS
Date Shot/Created
04/28/2023
Media Usage Rights/License
Public Domain
Image
A survey quad on the bottom of the Ohio River. The size of the quad or other technique employed varies depending on the type of survey work being done.
Ecosystem
River/stream
Recreational Activity
Subject tags
Surveying