Research Article
Sep 1973
Evaporation Reduction with Reflective Covers
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VIEW THE REPLYPublication: Journal of the Irrigation and Drainage Division
Volume 99, Issue 3
Abstract
Floating reflective covers appear promising as a means of reducing evaporation from open water surfaces. Eight light-colored materials were studied using buried and exposed wall tanks to simulate a range of field conditions. Tested on the 2.1-m diam buried tanks were asphalt-concrete blocks, white butyl rubber, foamed butyl rubber, Mini-Vaps, Styrofoam, and foamed wax blocks. The same foamed wax blocks and two continuous wax covers of different melting points were tested on the 2.7-mediam exposed wall tanks. Efficiencies ranged from 23–79% reduction and from 36–87% reduction on the buried and exposed wall tanks, respectively. Styrofoam and the lower melting point continuous wax layer were the most efficient. The three wax covers and the two butyl rubber covers were the most economical, saving water for between $0.12 and $0.28 per 1,000 lc ell ($0.44 to $1.07 per 1,000 gal). These costs are less than most alternative methods of providing additional water supplies.
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Information
Published In
Journal of the Irrigation and Drainage Division
Volume 99 • Issue 3 • September 1973
Pages: 353 - 363
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Sep 1973
Published online: Feb 11, 2021
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Authors
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Keith R. Cooley, AM.ASCE
Research Hydro., U.S. Water Conservation Lab., Phoenix, Ariz.
Lloyd E. Myers, F.ASCE
Assoc. Deputy Administrator, Western Region, Agricultural Research Service, U.S. Dept. of Agr., Berkeley, Calif.; formerly, Research Hydr. Engr., U.S. Water Conservation Lab., Phoenix, Ariz.
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