Feedback control of cablegation systems

Humphries, Michael and Trout, T.J. (1990) Feedback control of cablegation systems. pp. 667-674. In: Proc. of 3rd Natl. Irrig. Symp. Visions of the Future. USA-AZ-Phoenix, 1990/10/28-11/01. ASAE, St. Joseph, MI.

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Abstract

Cablegation is an automated furrow irrigation system (Kemper et al.,1981; Kemper
et al., 1985; Kemper et al., 1987) fabricated from gated-pipe, a plug that blocks
water flow and slides through the pipe, and a controller that reels out cable
to regulate the rate of plug movement. The pipe, with open outlets located near
the top of the pipe, is placed on a uniform grade. Water flows through the pipe
below the level of the outlets until it reaches the plug where it backs up and
flows out of the outlets. Outlets nearest the plug flow at the highest rate,
while those further upstream flow at decreasing rates (Figure 1). As the plug
moves, the flow is cut back to each furrow. Since each furrow is in a different
phase of irrigation, tailwater runoff is fairly constant after an initial
starting period.

Item Type:	Conference or Workshop Item (Paper)
NWISRL Publication Number:	0718
Subjects:	Practical farm efficiency Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:55
Last Modified:	22 Dec 2016 15:56
Item ID:	878
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/878