Water resource regions
By Chesapeake Bay Activities
1987 (approx.)
![Water resource regions](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/water_resource_map.jpg?itok=tPf4IFkb)
Detailed Description
Water resource regions - The gray lines are state lines, the blue lines are major rivers, and the white lines are water-resources region boundary lines
Sources/Usage
Public Domain.