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Analysis of application uniformity coefficient of the microsprinklers

Authors: Palaretti, Luiz Fabiano; Zanini, José Renato; Vecchiato, Diego Augusto; Dalri, Alexandre Barcellos; De Faria, E Rogério Teixeira;

Analysis of application uniformity coefficient of the microsprinklers

Abstract

The aim of this study was to analyze water application uniformity and wetness pattern of microsprinklers DAN 2001 and DAN 2002 according to ABNT NBR (2004). The test was conducted in Paulista State University, campus of Jaboticabal, SP. The test time was 1 hour under a constant pressure of 250 kPa and total absence of wind, with 3 replications. The distribution uniformity coefficient (CUD); uniformity (CUC) and wetness pattern of microsprinklers were determinated. The average values of CUC for both microsprinklers were described as good, reaching 80.22 and 83.21% for the DAN 2001 and DAN 2002, respectively. The average values of CUD were 71.35% (DAN 2001) and 75.39% (DAN 2002), both described as good. The average values of CUC and CUD did not differ in Tukey tests (p≥0.05), with coefficient variation values of 6.52 and 10.77, respectively. The wetness pattern showed higher intensities application (4.0 to 5.0 mm h-1) for the first 0.25 m distance from the microsprinklers, decreasing with increasing distance, with intensities from 2.0 to 3.0 mm h-1 at 2.25 m.

Country
Brazil
Keywords

Emitters, Operating range, Overlapping

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green