Simulating Elevation and Infiltration in Level-Basin Irrigation
Publication: Journal of Irrigation and Drainage Engineering
Volume 126, Issue 2
Abstract
Several authors have reported that the spatial variability of infiltration and soil surface elevation can have a pronounced effect on surface irrigation performance. This study was conducted to assess the improvement of the predictive capability of a level-basin irrigation model when both sources of spatial variability are considered. A 2D simulation model was used to simulate irrigation events with or without spatial variability of infiltration and/or elevation. Four irrigations that were applied to a corn crop planted on an experimental, laser-leveled basin were simulated. Introducing soil surface elevation variability improved the quality of the simulation of advance, recession, and crop yield, whereas introduction of infiltration variability did not. If infiltration is randomly distributed in the basin, it does not seem justified to introduce its variability in the model. As for soil surface elevation variability, its introduction would be justified even if laser leveling was used. Finally, the introduction of both sources of variability led to an accurate estimation of distribution uniformity.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 126 • Issue 2 • March 2000
Pages: 78 - 84
History
Received: May 7, 1999
Published online: Mar 1, 2000
Published in print: Mar 2000
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