Assessment of Hydraulic Performance of Drip-Irrigation Emitters at Low Head Pressures
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Volume 137, Issue 11
Abstract
The hydraulic performance of drip-irrigation emitters is very important for the design of drip-irrigation systems, especially when commonly available high-head emitters are used in low-head drip-irrigation systems. This study tested three representative commercially available emitters using a custom-made constant-head setup to assess the hydraulic performance in working heads ranging from 0.2 to 10 m. The coefficient of manufacturing variation () and the emitter discharge exponent () were calculated. All the tested emitters were found suitable for low-head drip irrigation systems, but there was a clear effect on the coefficient of manufacturing variation and the emitter discharge exponent of the tested emitters at working heads of less than 1.0 m.
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Acknowledgments
This study is part of the National Key Technology R&D Program (UNSPECIFIED2006BAD11B02-03), Tianjin Binhai New Area’s Construction Science and Technology Action Planning Project supported by Chinese Academy of Sciences (CASTJZX1-YW-02) and (CASTJZX1-YW-12), and the Project for 100 Outstanding Young Scientists (Yaohu Kang) supported by the Chinese Academy of SciencesCAS.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 137 • Issue 11 • November 2011
Pages: 730 - 734
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 16, 2010
Accepted: Mar 21, 2011
Published online: Mar 23, 2011
Published in print: Nov 1, 2011
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