Microirrigation Submain Unit with Pressure Reducing Pipes
Publication: Journal of Irrigation and Drainage Engineering
Volume 128, Issue 1
Abstract
A pressure reducing pipe (PRP), used at the inlet of a lateral in microirrigation systems to improve water application uniformity, is developed. It is composed of an internal spiral and a sleeve pipe and is made of molded polyethylene plastic. It functions to dissipate a pressure head that exceeds the required pressure head of a lateral inlet by directing water flow through the spiral grooved path and creating a certain head loss. An improved design method for submain units using the pressure reducing pipes is based on the hydraulics of the submain unit and the characteristics of the head loss in the PRP. The effects of the PRP on water application uniformity in a submain unit are analyzed by computer simulation. The submain unit with the PRP has higher uniformity than that of the commonly used method. After choosing the PRP, the permissible range of pressure variation in a submain will not need to be considered for the submain length in a layout.
Get full access to this article
View all available purchase options and get full access to this article.
References
Bralts, V. F., and Segerlind, L. J.(1985). “Finite element analysis of drip irrigation submain unit.” Trans., Am. Soc. Agric. Eng., 28(3), 809–814.
Kang, Y., and Nishiyama, S.(1995). “Hydraulic analysis of microirrigation submain units.” Trans., Am. Soc. Agric. Eng., 38(5), 1377–1384.
Kang, Y., and Nishiyama, S.(1997). “An improved method for designing microirrigation submain units.” Irrig. Sci., 17, 183–193.
Li, Y., Ma, C., Mu, R., Jiang, H., and Lu, N.(1993). “Measurement and analysis of hydraulic performances of plastic microtube.” J. Hydraul. Eng., 11, 1–9 (in Chinese).
Perez, R., Matinez, F., and Vena, A.(1993). “Improved design of branched network by using pressure-reducing valves.” J. Hydraul. Eng., 119(2), 164–180.
Vermeiren, I., and Jobling, G. A. (1980). “Localized irrigation—design, installation, operation, evaluation.” Irrigation and Drainage Paper (36), Food and Agriculture Organization of the United Nations, Rome.
Wu, I. P., and Gitlin, H. M.(1975). “Energy gradient line for drip irrigation laterals.” J. Irrig. Drain. Div. ASCE, 101(1R4), 323–326.
Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 128 • Issue 1 • February 2002
Pages: 43 - 48
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jan 5, 2000
Accepted: Oct 5, 2000
Published online: Feb 1, 2002
Published in print: Feb 2002
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.