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Dynamic model for water application using centre pivot irrigation

AuthorsDelirhasannia, Reza; Sadraddinia, A. A.; Nazemia, A. H.; Farsadizadeha, D.; Playán Jubillar, Enrique CSIC ORCID
Keywordscentre pivot
dynamic grid
static grid
uniformity coefficient
Application depth
Issue DateApr-2010
CitationDelirhasanniaa R, Sadraddinia AA, Nazemia AH, Farsadizadeha D, Playán Jubillar E. Dynamic model for water application using centre pivot irrigation. Biosystems Engineering 105 (4): 476-485 (2010)
AbstractThe application pattern for single, stationary spray sprinklers exposed to the wind was modelled to simulate water application in a centre pivot-irrigated field. In the model, a dynamic square grid of cells for water application and a static square grid of cells for water collection were defined. The dynamic grid contained the information on the water application pattern of an isolated spray sprinkler, and this followed the motion of the centre pivot lateral. The static grid represented the entire field, and received water from the dynamic grid at fixed time intervals. Model outputs included the applied water distribution pattern and measures of irrigation uniformity (radial, travelling path and global). A series of experiments using pivoted and single spray sprinklers were conducted simultaneously. The results from the model compared well with field observations. The resulting root mean square errors for the Heermann and Hein uniformity coefficient and the average applied water depth were 0.02% and 0.08 mm, respectively. Model simulations were carried out to illustrate the effect of wind on irrigation uniformity.
Description32 Pag., 7 Fig., 2 Tabl. The definitive version is available at:
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