A variable flow rate sprinkler for site-specific irrigation management

UN ASPERSOR DE CAUDAL VARIABLE PARA EL MANEJO DE LA IRRIGACION EN SITIOS ESPECIFICOS

King, B.A. and Kincaid, D.C. (2004) A variable flow rate sprinkler for site-specific irrigation management. Applied Engineering in Agriculture. 20(6):765-770.

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Abstract

A variable flow rate sprinkler applicable to center pivot and lateral–move irrigation systems was constructed and
tested in the laboratory. Sprinkler nozzle size was reduced a fixed amount using a retractable concentric pin in the nozzle bore.
Cycling insertion of the concentric pin in the sprinkler nozzle bore provided a time– averaged variable flow rate over a range
of 36% to 100% for the nozzle sizes tested. The application pattern radius of the sprinkler tested was reduced approximately
15% under variable flow conditions. Sprinkler drop size distribution was also reduced by engagement of the pin in the
sprinkler nozzle bore. Measured flow rates compared well with theoretical flow rates below 28 L/min (7.4 gpm). Results from
laboratory testing indicate the variable flow rate sprinkler could potentially be used for site–specific irrigation management
with center pivot and lateral–move irrigation systems.

Item Type:	Article
NWISRL Publication Number:	1144
Subjects:	Irrigation > Site-specific irrigation Irrigation > Sprinkler irrigation Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:49
Last Modified:	03 Nov 2016 16:00
Item ID:	6
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/6