Backcountry travel in Grand Canyon to collect groundwater samples
![USGS scientist hikes to National Canyon Spring to collect groundwater samples from a remote location.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/USGS_HikingtoNationalCanyonSpring.jpg?itok=cDe2yv1P)
Detailed Description
USGS scientist Joel Unema hikes to National Canyon Spring to collect groundwater samples from a remote location near the south rim of the Grand Canyon. Joel Unema was part of a group of USGS and National Park Service scientists that rafted 150 miles in nine days to better understand natural resources.
Sources/Usage
Public Domain.