Impact of micrometeorological conditions on the efficiency of artificial monolayers in reducing evaporation

Gallego-Elvira, Belen and Martinez-Alvarez, Victoriano and Pittaway, Pamela and Brink, Gavin and Martin-Gorrez, Bernardo (2013) Impact of micrometeorological conditions on the efficiency of artificial monolayers in reducing evaporation. Water Resources Management, 27 (7). pp. 2251-2266. ISSN 0920-4741


Monolayer products can potentially provide a cost effective solution for reducing evaporative loss from water storages. Commercial adoption has been low, due to the extreme variability of product performance. In this study, the efficiency of three monolayer compounds (stearyl alcohol, ethylene glycol monooctadecyl ether and the commercial product WaterSavr) in reducing evaporation were tested at three controlled wind speeds inside a glasshouse in class-A evaporation pans. Water levels and micrometeorological conditions were monitored to document the impact of prevailing atmospheric conditions on monolayer performance. the evaporation reduction ranged from 13 to 71% depending on the product and micrometeorological conditions. The ethylene glycol monooctadecyl ether was most effective reducing evaporation across all wind speeds. Atmospheric conditions markedly affected monolayer product's performance. All monolayers were most effective when the wind was sufficient to drive evaporative loss but lacked the force to disrupt the condensed monolayer (1.5 ms-1). Continuous wind of 3 ms-1 disrupted the condensed monolayer and substantially decreased the product performance. Without wind, the resistance to evaporation induced by monolayers had little additional effect. When atmospheric evaporation demand was very low, the evaporation suppression efficiency was minimized. High temperatures and high incoming radiation negatively affected the persistence of the condensed monolayer and decreased product performance. These results highlight the importance of analysing micrometeorological conditions when assessing product performance.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 Springer Science+Business Media. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 01 Sep 2014 07:41
Last Modified: 23 Mar 2017 01:16
Uncontrolled Keywords: evaporation suppression; water conservation; stearyl alcohol; WaterSavr; ethylene glycol monooctadecyl ether
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050205 Environmental Management
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
Socio-Economic Objective: D Environment > 96 Environment > 9609 Land and Water Management > 960905 Farmland, Arable Cropland and Permanent Cropland Water Management
Identification Number or DOI: 10.1007/s11269-013-0286-3

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