A SEMI-EMPIRICAL MODEL FOR ESTIMATING THE GEOMETRY OF THE WETTING FRONT UNDER POINT SOURCE TRICKLE IRRIGATION

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ABBAS PALANGI J.; AKHOUND ALI A.M.

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Paper Information

Journal: Journal of Water and Soil Science Year:2008 | Volume:12 | Issue:44 Page(s): 85-95

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Title

A SEMI-EMPIRICAL MODEL FOR ESTIMATING THE GEOMETRY OF THE WETTING FRONT UNDER POINT SOURCE TRICKLE IRRIGATION

Author(s)

ABBAS PALANGI J. | AKHOUND ALI A.M. | Issue Writer Certificate

Keywords

TRICKLE IRRIGATIONQ2

POINT SOURCEQ2

WETTING FRONTQ2

DIMENSIONAL ANALYSISQ2

Abstract

For an appropriate drip irrigation system design, a prediction of soil wetting pattern is needed for a given soil texture. The wetting pattern geometry is a key factor for emitter distance determination as well as crop type. The geometry of the wetting bulb is dependent on the parameters such as soil hydraulic properties, emitter discharge and the irrigation time. This study has been conducted in Albaji region in km 25 on the Ahvaz-Andimeshk road, in order to estimate the geometry of the wetting pattern under the POINT SOURCE trickle emitters in sandy soil with different discharge. The emitters were calibrated to provide 5, 10, 20, 30 and 40 liter per hour discharges. The maximum wetted soil surface and depth was measured by digging the irrigated soil. Two models were developed to predict wetted soil surface diameter and depth under a POINT SOURCE based on Buckingham's p theorem. The equations were calibrated by using the measured data. Then resulted scientific-empirical equations have been evaluated. Considering the maximum relative error of 14.3% and root mean square error of 3.8cm in estimation of the wetted soil surface diameter and depth, the models are recommended to estimate the geometry of the wetting bulbs with a high degree of accuracy, and can be used in designing and appropriate drip irrigation system management.

Cites

SIMULATING WETTING FRONT IN DRIP IRRIGATION USING HYDRUS-2D

References

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APA: Copy

ABBAS PALANGI, J., & AKHOUND ALI, A.M.. (2008). A SEMI-EMPIRICAL MODEL FOR ESTIMATING THE GEOMETRY OF THE WETTING FRONT UNDER POINT SOURCE TRICKLE IRRIGATION. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 12(44), 85-95. SID. https://sid.ir/paper/14902/en

Vancouver: Copy

ABBAS PALANGI J., AKHOUND ALI A.M.. A SEMI-EMPIRICAL MODEL FOR ESTIMATING THE GEOMETRY OF THE WETTING FRONT UNDER POINT SOURCE TRICKLE IRRIGATION. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2008;12(44):85-95. Available from: https://sid.ir/paper/14902/en

IEEE: Copy

J. ABBAS PALANGI, and A.M. AKHOUND ALI, “A SEMI-EMPIRICAL MODEL FOR ESTIMATING THE GEOMETRY OF THE WETTING FRONT UNDER POINT SOURCE TRICKLE IRRIGATION,” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 12, no. 44, pp. 85–95, 2008, [Online]. Available: https://sid.ir/paper/14902/en

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