Eddy covariance measurements of the total evaporation during sprinkler irrigation - preliminary results

Uddin, J. and Smith, R. J. and Hancock, N. H. and Foley, J. (2011) Eddy covariance measurements of the total evaporation during sprinkler irrigation - preliminary results. In: SEAg 2011: Diverse Challenges, Innovative Solutions, 29-30 Sep 2011, Gold Coast, Australia.

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Abstract

Eddy covariance (ECV) is a direct, accurate and reliable micrometeorological mass transfer method for measuring evaporation and evapotranspiration (ET). It has been used successfully for the last decade to measure evaporation from natural and agricultural plant communities. However, a review of the literature provided no instances of it being used to measure evaporation losses occurring during sprinkler irrigation. Instead, sprinkler irrigation research has focused on using traditional methods acknowledged to have many limitations. Some of these limitations can be overcome by adopting this new technique. In this field study the feasibility of ECV to measure the total evaporation during sprinkler irrigation over the cotton crop is established. The trials were carried out at small scale (area 0.2 ha) at the Agricultural Station at USQ using a low pressure impact type sprinkler irrigation system. Results indicated that ECV technique was clearly able to measure the different rates of total evaporation before, during and after sprinkler irrigation. Using this technique, the average additional evaporation (loss) as a direct result of sprinkler irrigation was measured as about 0.2 mm/hr (50% extra) over the grass surface, 0.36 mm/hr (44%) at the early stage of the cotton crop and 0.30 mm/hr (63%) at the mature stage in comparison with pre irrigation period.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Publisher does not formally support archiving.
Depositing User: Mr Md Jasim Uddin
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 24 Jan 2012 05:55
Last Modified: 03 Jul 2013 01:00
Uncontrolled Keywords: eddy covariance; evapotranspiration; evaporation losses; sprinkler irrigation
Fields of Research (FOR2008): 07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070199 Agriculture, Land and Farm Management not elsewhere classified
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
09 Engineering > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations
Socio-Economic Objective (SEO2008): B Economic Development > 82 Plant Production and Plant Primary Products > 8299 Other Plant Production and Plant Primary Products > 829999 Plant Production and Plant Primary Products not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/20553

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