Postprint version. Published in Journal of Irrigation and Drainage Engineering, Volume 134, Issue 3, June 1, 2008, pages 292-297.
Copyright © 2008 American Society of Civil Engineers.
The definitive version is available at http://dx.doi.org/10.1061/(ASCE)0733-9437(2008)134:3(292).
Emitter pressures and flow rates were systematically and extensively sampled in one drip and one microspray field. The data distributions are presented. The accuracy of rapid (limited samples) evaluation pressure sampling procedures was found to be quite good if the pressure distribution was systematic, but erroneous if the pressure distribution throughout a field was random. A simple mathematical combination of two nonuniformity components (due to pressure differences, and other causes of flow variation) provided a better estimate of overall system distribution uniformity than more complex mathematics.
Bioresource and Agricultural Engineering