During the fall of 1959, monolayer behavior studies were made on two lakes in the southwest; Boulder Basin of Lake Mead, Nevada, and Lake Sahuaro near Phoenix, Arizona.
These studies were made to evaluate the effect of geographical and climatological conditions on movement and behavior of monolayers. The Lake Sahuaro tests also were used to provide data for design and development of improved methods of application and maintenance of a film on this lake in anticipation of full scale, evaporation-reduction tests to be performed there during the summer of I960.
The Lake Mead studies produced the following general points of information:
1. Wind pattern was primarily onshore-offshore for the season of the year studied
2. Early morning winds were generally heavier and tending from the north
3. Film was very persistent apparently because of four factors: large size of basin, steep walls forming the basin, variable onshore-offshore wind pattern, and probable low bacterial attrition
4. It appears that maintaining of a monolayer under the conditions found at Lake Mead during these tests would not be too difficult and that a significant coverage could be retained for reasonable lengths of time
The Lake Sahuaro studies produced the following general points of information:
1. Wind pattern was primarily controlled by canyons entering the basin. Southerly winds were dominant during the test period
2. Film was very persistent apparently because of three factors: steep walls of the lake, variable, low velocity winds, and probable low bacterial attrition
3. Under similar conditions, a full-scale treatment of Lake Sahuaro could probably be accomplished with reasonably high percent coverage for long periods of time by use of strategically located dispensers near the shoreline
Boulder Basin, Lake Mead, Lake Sahuaro, Monolayers, Water evaporation
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Bureau of Reclamation,
"Preliminary report: Monolayer behavior studies, 1959" (1960).
Publications (WR). Paper 11.
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