Graphic showing four levels of ground cover or impervious surface and each's relationship with runoff

Impervious cover in a watershed results in increased surface runoff. As little as 10 percent impervious cover can result in stream degradation.

Image retrieved from "Stream Corridor Restoration: Principles, Processes, and Practices," pp. 3-23, courtesy of the Federal Interagency Stream Restoration Working Group.

Last modified
22 January 2020 - 2:00pm