Can advected energy affect the water use efficiency in sprinkler irrigation?

Uddin, Jasim and Smith, Rod and Hancock, Nigel and Foley, Joseph (2014) Can advected energy affect the water use efficiency in sprinkler irrigation? In: Irrigation Australia Conference 2014: Water for Life, Future for All, 2-6 June 2014, Gold Coast, Australia .

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Abstract

Competing demands for water with increasing population calls for developing strategies for increasing the crop water use efficiency (WUE) of irrigated crops, especially in the arid and semiarid regions of the world. In this context, it is important to quantify the various factors that control the WUE of irrigated crops in these regions. Advection is an important factor that can have significant effects on the energy exchange especially in sprinkler irrigated fields of arid regions, and hence control the crop canopy water use efficiency. An eddy covariance system with meteorological measurements was used to quantify the advection over a small scale irrigated cotton field at Agricultural Experimental Station at the University of Southern Queensland, Australia.

The impact of advection on evapotranspiration during sprinkler irrigation was found significant over a range of microclimate conditions that varied from moderate vapour pressure deficit and wind speed to extreme events with large VPD and wind speed. The values of advected energy varied from 0.12 mm hr-1 to a maximum of 0.6 mm hr-1 with an average value of 0.2 mm hr-1. Due to advection, the percentage of latent and sensible heat flux exchange contribution to the total water loss from wet canopy through evapotranspiration can exceed up to 40% which decreased CWUE remarkably.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Abstract only, as supplied here, published in the Conference Proceedings. No evidence of copyright restrictions preventing deposit.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 03 Jun 2015 04:31
Last Modified: 20 Jun 2017 04:06
Uncontrolled Keywords: irrigation; water use efficiency
Fields of Research : 07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070101 Agricultural Land Management
URI: http://eprints.usq.edu.au/id/eprint/27341

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