Sampling Locations in Upper Mississippi River Basin
![Map of watersheds and sampling sites of the Upper Mississippi River Basin](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Figure1a_Crop2.jpg?itok=uzb_x06P)
Detailed Description
Figure 1a. Upper Mississippi River Basin major tributary watersheds and sampling locations for 2015-17 study. Yellow dots mark mainstem Mississippi River, major tributary, and Chippewa River basin sampling sites that were visited quarterly during 2015-17; black dots and red dots mark targeted sampling sites visited one time during 2015-17. Creator: Sydney Foks, USGS, 2017.
Sources/Usage
Public Domain.