The magnitude of water loss due to evaporation from reservoirs, lakes, ponds, and rivers for the 17 western states has been estimated to be roughly the amount of water sufficient to provide a 6-inch layer of water over an area the size of South Dakota. Increasing demand for water has stimulated interest and research in the use of a monolayer film for water conservation. Among other things, previous experiments demonstrated that large reservoirs could be covered with a monolayer film under favorable wind conditions and that the presence of the film reduced evaporation. To study the effect of a monolayer film on evaporation reduction in the northern Great Plains, a field experiment on Pactola Reservoir in Pennington County, South Dakota, was conducted in 1962 and 1963 by the Bureau of Reclamation and South Dakota State University.
South Dakota State University
Agricultural Experiment Station, "Evaporation Reduction Investigation Pactola Reservoir, South Dakota , 1962-1963" (1964). Agricultural Experiment Station Technical Bulletins (1939-2011). 35.