ABSTRACT
The Pennsylvania State University owns and operates Stone Valley Lake as a recreational, educational, and research facility. In the control-method evaluation section, this chapter defines treatment and control areas, designates sampling stations, outlines treatment methods. It covers interactions of chemical and mechanical controls with respect to water quality parameters, ecosystem stability and productivity, and public usage and response. Many quality parameters were monitored to determine effects of both the chemical treatment and the mechanical harvesting on the overall water quality of Stone Valley Lake. The chapter develops a profile of the average recreational user of the Stone Valley Lake, and determines his opinion on the aquatic plant control program. The chemical program using the herbicide 2,4-dichlorophenoxy acetic acid proved to be very effective in controlling the weed growth without any major effect on water quality, or most of the aquatic biota.
