Ronald J Sutherland's "A Regional Approach to Estimating Recreation Benefits of Improved Water Quality" journal article asserts that the amount of recreation influences the amount of revenue brought in especially when judging whether a water source is "fishable and swimmable." He presents this in order to show the importance of the method of involvement of water and the functionality of water and the possible recreational activities involved with it. This information is presented very straight forwardly and factually yet still appealing to a general audience.

Sutherlan, Ronald J. "A Regional Approach to Estimating Recreation Benefits of Improved Water Quality" Analysis and Assesmsent Division. Vol. 9. Issue 3. 229-247. (1982) Web.
http://www.sciencedirect.com/science/article/pii/0095069682900328