Hydraulic factors of laterals in subsurface drip irrigation

Bai Dan; Wang Xiaoyu; Song Lixun; Li Gang; Dang Zhiliang

Volume 25 Issue 11

Nov. 2009

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Abstract

Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2009 > 25(11): 19-22.

Bai Dan, Wang Xiaoyu, Song Lixun, Li Gang, Dang Zhiliang. Hydraulic factors of laterals in subsurface drip irrigation[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2009, 25(11): 19-22.

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Hydraulic factors of laterals in subsurface drip irrigation

1.
Key Lab of Northwest Water Resources and Environment Ecology, Ministry of Education, Xi’an University of Technology, Xi'an 710048, China
2.
Water Conservancy and Building Engineering Institute, Tarim University, Aral 843300, China
3.
College of Science, Xi'an Polytechnic University, Xi’an 710048, China

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Received Date: May 29, 2008
Revised Date: November 15, 2009
Published Date: November 29, 2009

Graphical Abstract

Abstract

Abstract

A thorough understanding of pressure and discharge along lateral is needed for efficient design and operation of subsurface drip irrigation (SDI) .Test data and distribution of pressure and emitter discharge were obtained by using shorter lateral based on the experiment plan of SDI lateral hydraulic factors .The nonlinear equations describing lateral pressure, emitter discharge and local head loss factor coefficient were established based on the test data and research results of single emitter hydraulic characteristics in SDI. Calculation of nonlinear equations had been translated into the function optimization problem, and the optimization mathematical model was established, the genetic algorithms was adopted to solve the model. The calculated result was validated by test data, and it indicated that the distribution of pressure and discharge along SDI lateral could be described with the nonlinear equations and solution method had the high calculation accuracy. This method lays the foundation of further study the hydraulic factors of SDI lateral.
- irrigation,
- hydraulics,
- nonlinear equations,
- genetic algorithms,
- subsurface drip irrigation,
- laterals

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