Reservoir evaporation control

The general background and review of the science dealing with evaporation control is presented, with the hope that effective application to large reservoirs will be successful. Experimental research projects are reviewed, dating back to 1925 where using products of alcohol derivatives would form a monomolecular film over the surface of the water to control evaporation. Considerable work published on such methods are cited as well as experimental projects underway in the United states, England an Australia. Laboratory experiments indicate a 99.99% reduction in evaporation but field work will probably show a reduction of 20 to 45%. A list of 14 references accompany the paper.