DEVELOPMENT A COMPUTER MODEL TO DETERMINE THE OPTIMUM LATERAL LENGTH OF MICROIRRIGATION SYSTEMS

Khedr, A. F.; Rashad, M. A.; ElMasry, G. M.; El-Sayed, A. S.; Hegazi, M. M.

doi:10.21608/mjae.2015.98614

DEVELOPMENT A COMPUTER MODEL TO DETERMINE THE OPTIMUM LATERAL LENGTH OF MICROIRRIGATION SYSTEMS

Document Type : Original Article

Authors

¹ Assistant lecturer, of Agric. Eng., Agric. Eng. Dept., Fac. of Agric., Suez Canal Univ., Egypt.

² lecturer, of Agric. Eng., Agric. Eng. Dept., Fac. of Agric., Suez Canal Univ., Egypt.

³ Assistant Prof., Associate Prof. and Prof. of Agric. Eng., Agric. Eng. Dept., Fac. of Agric., Suez Canal Univ., Egypt.

⁴ Prof. of Agric. Eng., Agric. Eng. Dept., Fac. of Agric., Suez Canal Univ., Egypt.

⁵ Prof. of Agric. Eng., Agric. Eng. Dept., Fac. of Agric., Ain Shams Univ., Egypt.

10.21608/mjae.2015.98614

Abstract

This study was carried out for developing a computer model to determine the optimum length of lateral in microirrigation systems. The model was designed to obtain a flow variation (q_var) of 10, 15 and 20 % and/or coefficient of uniformity (CU) greater than 85 %. The model was then validated by a hydraulic experiment which measure CU of five emitters. The examined emitters were in-line (Em₃), on-line (Em₁, Em₂; Em₄) and Em₅ was microtube (a 3.80 mm inside diameter with a length of 50 cm), at four lateral lengths, under seven operating pressures. The theoretical model and the validation experiment were compared indicating that there was a strong relationship with coefficient of determination (R²) more than 0.95 between the measured and predicted CU for Em₁, Em₂ and Em₃, while this relationship was decreased with R² about 0.80 for Em₄ and Em₅ at different treatments.

Keywords

References

REFERENCES

Allen, R. G. (1996). Relating the Hazen-Williams and Darcy-Weisbach friction loss equations for pressurized irrigation systems. Applied Eng. in Agric. 12: 685 - 693.

Amer, K. H. (2001). Comparison between modern irrigation system designs. Ph.D. Thesis of Agricultural Engineering, Department of Agricultural Engineering, Faculty of Agriculture, Minufiya University, Egypt, PP: 156.

ASAE Standards (1999). EP 458: Field evaluation of microirrigation systems. St. Joseph, Michigan, ASAE, 918 - 924.

ASABE Standards (2003). EP 405.1 FEB03: Design and installation of microirrigation systems. St Joseph, Michigan, ASAE, 901 - 905.

ASABE Standard (2008). EP 405.1 APR1988: Design and installation of microirrigation Systems.ASAE, 1 - 5.

Bralts, V. F. and I. P. Wu (1979). Emitter flow variation and uniformity for drip irrigation. ASAE Paper No. 79 - 2099. p. 34 ASAE, St. Joseph, MI.

Christiansen, J. E. (1942). Irrigation by sprinkler. Bulletin 670. California Agricultural Experiment Station. University of California. Berkeley, USA, PP: 124.

Demir, V.; H. Yurdem and A. Degirmencioglu (2007). Development of prediction models for friction losses in drip irrigation laterals equipped with integrated in-line and on-line emitters using dimensional analysis. Biosystems Engineering, 96(4): 617 - 631.

Demir, V. (1999). A research on the determination of the technical properties and frictional losses of the components used in microirrigation systems. Proceeding of the Seventh International Congress on Mechanization and Energy in Agriculture, A Dana, Turkey, PP: 84 - 89.

Demir, V. and E. Uz (1995). The comparison of friction loss equations employed in determining the optimum lateral lengths of drip irrigation systems. Proceedings of the 16^th National Agricultural Mechanization Congress, Bursa, Turkey, PP: 441 - 450.

El-Meseery, A. A. M. (1999). A study on design and evaluation of bubbler irrigation system, Ph.D. Thesis, Department of Agricultural Engineering, Faculty of Agriculture, Al-Azhar University, Egypt, PP: 125.

Hassan, N. S. H., (2007). Evaluation of trickle irrigation designs based on uniformity concept. M.SC. Dept. of Agric. Eng. Fac. of Agric., Ain Shams U., Egypt, PP: 119.

Hanafy, M. (1995). Trickle irrigation lateral design (II). Misr Journal of Agricultural Engineering, 12(1): 66 - 109.

Jiang, S. and Y. Kang (2010). Evaluation of micro-irrigation uniformity on laterals considering field slopes. Journal of irrigation and drainage engineering: 429 - 434.

Keller, J. and R. D. Bliesner (1990). Sprinkler and trickle irrigation. Van Nostrand, Reinhold, New York, PP: 652.

Keller, S. and P. Karmeli (1975). Trickle irrigation design. l^st. Ed., Rain Bird Sprinkler Manufacturing Corporation, Glendora, USA, PP: l33.

Keller, S. and P. Karmeli (1974). Trickle irrigation design parameters. Transaction of the ASAE, 17(4): 678 - 684.

Lamm, F. R.; J. E. Ayars and F. S. Nakayama (2007). Microirrigation for crop production: design, operation, and management. 13^th ed., Italy. Elsevier, 533-570.

Li, J.; W. Zhao; J. Yin; H. Zhang; Y. Li and J. Wen (2012). The effects of drip irrigation system uniformity on soil water and nitrogen distributions. Transactions of the ASABE (American Society of Agricultural and Biological Engineers, 55(2):415-427.

Ngigi, S. N. (2008). Technical evaluation and development of low-head drip irrigation systems in Kenya. Irrigation and Drainage. 57: 450 - 462.

Pitts, D. J.; J. A. Ferguson and R. E. Wright (1986). Trickle irrigation lateral line design by computer analysis. Transactions of the ASAE 29(5): 1320 - 1324.

Tagar, A. A.; M. S. Mirjat; A. Soomro and A. Sarki (2010). Hydraulic performance of different emitters under varying lateral lengths. Journal of Agricultural Engineering, Vet. Sci., 26(2): 48 - 59.

Wu, I. P. and H. M. Gitlin (1974). Drip irrigation design based on uniformity. Transactions of the ASAE 17(3): 429 - 432.

Yildirim, G. (2010). Total energy loss assessment for trickle lateral lines equipped with integrated in-line and on-line emitters. Irrig. Sci., (28): 341 - 352.

Yurdem, H.; V. Demir and A. Degirmencioglu (2011). Development of a software to determine the emitter characteristics and the optimum length of new designed drip irrigation laterals. Mathematical and Computational Applications, 16(3): 728 -737.