Reduction of Evaporation from Water Reservoirs Using Floating Covers in Isfahan

Document Type : Research Paper

Authors

1 . Former MSc Student of Irrigation and Drainage, Dept. of Water Eng., College of Agriculture, Isfahan. University. of Technology

2 Isfahan University of Technology

Abstract

The aim of this study was to evaluate the influence of Floating Covers on the reducing evaporation from free water surface. In this study three types of covers (Polystyrene, Polystyrene with aluminum and polycarbonate) on the surface of 3 reservoirs (with three repetitions for each covers) were used. Changes in water depth of covered and uncovered reservoir were measured in one year from October 2014 until November 2015. Then the evaporation results of covered and uncovered trials were analyzed in form of a randomized complete block design with three replications using SAS software at confidence level 99% (P<0.01) and Duncan test. The rate of evaporation reduction using Polystyrene, Polystyrene with aluminum and Polycarbonate, are 85.60%, 83% and 76.5%, respectively. These amounts represent a good performance of three covers in reducing evaporation from reservoirs. Although Polycarbonate cover represents better and proper performance in relation to durability.

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References

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Iranian Journal of Soil and Water Research
Volume 49, Issue 3
May and June 2018
Pages 597-605

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