Experimental study on calculation model of labyrinth emitter discharge under subsurface drip irrigation

Hou Wen, Bai Dan, Zhou Wen

Abstract


Abstract: For different texture of soils, the grain composition is different with significant changes. Since the emitter of subsurface drip irrigation (SDI) is buried in the soil, emitter discharge is influenced by soil properties. An experiment was conducted to investigate the relationship between the soil properties with emitter working pressure and emitter discharge of SDI. Selecting three different grain composition soils, and emitter working pressure, as well as soil clay content, soil bulk density and initial soil moisture content respectively as influence factors of emitter discharge of SDI, the experimental scheme was gained by uniform design. A calculation model for determination of the SDI emitter discharge was established by regression analysis with the first two kinds of soil test data, and its reliability was verified by the third kind of soil test data. The model is simple with high accuracy, easy to use, and lays the foundation to study hydraulic elements of SDI field network, especially taking the soil clay content as an influencing factor has widened the scope of application of the model. The achievement is of great significance for design and management of SDI.
Keywords: subsurface drip irrigation, emitter, soil clay content, discharge, calculation model
DOI: 10.3965/j.ijabe.20140706.003

Citation: Hou W, Bai D, Zhou W. Experimental study on calculation model of labyrinth emitter discharge under subsurface drip irrigation. Int J Agric & Biol Eng, 2014; 7(6): 14－19.

Keywords


subsurface drip irrigation, emitter, soil clay content, discharge, calculation model

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References


Fu Q, Gary Kachanoski, Liu D, Wang Z L. Evaluation of regional water security using water poverty index. Int. J. Agric. & Biol. Eng., 2008; 1(2): 8–14.

Camp C R. Subsurface drip irrigation: a review. Translations of the ASAE, 1998; 41: 1353–1367.

Lamm F R (ed). Microirrigation for a changing world: conserving resources/ preserving the environment. In: Proceeding of the Fifth International Microirrigation Congress. ASAE, St. Joseph, Mich, 1995.

Camp C R, Bauer P J, Hunt P G. Subsurface drip irrigation lateral spacing and management for cotton in the southeastern coastal plain. Transactions of the ASAE, 1997; 40(4): 993–999.

Ben-Gal A, Lazorovitch N, Shani U. Subsurface drip irrigation in gravel-filled cavities. Vadose Zone J., 2004; 3(4): 1407–1413.

Patel N, Rajput T B S. Dynamics and modeling of soil water under subsurface drip irrigated onion. Agric. Water Manage., 2008; 95(12): 1335–1349.

Shani U, Xue S, Gordin-Katz R, Warrick A W. Soil-limiting low from subsurface emitters. I: Pressure measurements. J. Irrig. Drain. Eng., 1996; 122(5): 291–295.

Gil M, Rodríguez-Sinobas L, Juana L, Sanchez R, Losada A. Emitter discharge variability of subsurface drip irrigation in uniform soils: Effect on water application uniformity. Irrigat. Sci., 2008; 26(6): 451–458. DOI: 10.1007/s00271- 008-0116-1

Rodriguez-Sinobas L, Gil M, S´anchez R, Juana L. Water distribution in subsurface drip irrigation Systems. I: Simulation. J. Irrig. Drain Eng., 2009; 135(6): 721–728.

Lazarovitch N, Shani U, Thompson T, Warrick A. Soil hydraulic properties affecting discharge uniformity of gravity-fed subsurface drip irrigation systems. J. Irrig. Drain. Eng., 2006; 132(6): 531–536.

Gil M, Rodríguez-Sinobas L, Sánchez R, Juana L. Procedures for determining maximum emitter discharge in subsurface drip irrigation. J. Irrig. Drain Eng., 2011; 137: 287–294.

Gil M, Rodr´ıguez-Sinobas L, S´anchez R, Juana L. Evolution of the spherical cavity radius generated around a subsurface drip emitter. Biogeosciences, 2010; 7: 1935–1958. DOI: 10.5194/bgd-7-1935-2010

Warrick A, Shani U. Soil-limiting flow from subsurface emitters. II: Effect on uniformity. J. Irrig. Drain Eng., 1996; 122(5): 296–300.

Shaviv A, Sinai G. Application of conditioner solution by subsurface emitters for stabilizing the surrounding soil. Irrig. Drain. Eng. ASCE, 2004; 130(6): 485–490.

Lazarovitch N, Simunek J, Shani U. System dependent boundary conditions for water flow from a subsurface source. Soil Science Society of America Journal, 2005; 69(1): 46–51.

Wang X Y, Bai D, Li Z B, Yang K, Li Y C. Laboratory test system of field pipe network under subsurface drip irrigation. Transactions of the CSAE, 2008; 24(4): 88–90.(in Chinese with English abstract)




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