The combined use of shade-cloth covers and monolayers to prevent evaporation in irrigation reservoirs

Gallego-Elvira, B. and Martinez Alvarez, V. and Pittaway, Pam and Symes, Troy and Hancock, Nigel (2010) The combined use of shade-cloth covers and monolayers to prevent evaporation in irrigation reservoirs. In: International Conference on Agricultural Engineering (AgEng 2010), 06-08 Sept 2010, Clermont-Ferrand, France. (Unpublished)

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Abstract

One of the most efficient techniques to prevent evaporation is suspended shade covers, reported to reduce evaporation up to 85%, although at considerable cost. Another option is the application of a chemical monolayer which creates a film over the water surface that can reduce evaporation, but performance of these is limited by environmental exposure. In this study, a detailed trial was conducted in southern Queensland (Australia) to assess the benefits of the combined use of monolayers and shade-cloth covers. Three experimental tanks were monitored to measure evaporation, water temperature profile and the meteorological factors driving evaporative demand. Tanks 1 and 2 were covered with a black polyethylene mesh; a monolayer was added to Tank 2; and Tank 3 was uncovered and used as a control. The comparison of Tanks 1 and 2 with Tank 3 provided the evaporation reduction factors. The differences between the reduction factors of Tanks 2 and 3 allowed assessment of the performance of the combination of the two evaporation-suppression methods.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: No
Item Status: Live Archive
Additional Information: Unrefereed paper. No evidence of copyright restrictions.
Depositing User: Assoc Prof Nigel Hancock
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 07 Nov 2010 04:36
Last Modified: 22 Oct 2013 05:07
Uncontrolled Keywords: polyethylene meshes, storage efficiency, water management
Fields of Research (FOR2008): 04 Earth Sciences > 0401 Atmospheric Sciences > 040199 Atmospheric Sciences not elsewhere classified
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9609 Land and Water Management > 960905 Farmland, Arable Cropland and Permanent Cropland Water Management
B Economic Development > 82 Plant Production and Plant Primary Products > 8298 Environmentally Sustainable Plant Production > 829805 Management of Water Consumption by Plant Production
D Environment > 96 Environment > 9605 Ecosystem Assessment and Management > 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments
URI: http://eprints.usq.edu.au/id/eprint/8917

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