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Catch Can Testing of a Variable Rate Irrigation System and Evaluation Using a Time Varying Densogram
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Paper number 131620517, 2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131620517) @2013
Authors: Charles C Hillyer, Chad Higgins, Jason Kelly
Keywords: Variable Rate Irrigation Irrigation Management Catch Can Test Densogram Uncertainty.
A series of catch can tests have been performed on an SS-VRI equipped pivot in the Pacific Northwest under two different wind speeds. A time-varying densogram was used to estimate the expected application depths based on the prescribed application depths. We developed a simple model of the uncertainties introduced by errors in pivot angle measurement, and wind drift. This model was used to modify the densogram to produce an estimated range of expected application depths. The modified densogram was compared to the observed catch can pattern produced using an isotropic spatial application pattern. The densogram model and preliminary results will be presented.(Download PDF) (Export to EndNotes)