عنوان مقاله [English]
Emitters clogging is one of the most important problems in the operation of drip irrigation systems and also it is one of the main obstacles to the development of this irrigation method. To investigate the effect of discharge, operating pressure and management of irrigation system on clogging, emitters with discharges of 4 and 8 l/h, under three different operating pressures (1.0, 2.0 and 3.0 bar) and under three irrigation management methods (four, two and one times flow cutoff in every four hours operation) were tested for 132 hours. Accordingly the research included 18 treatments with four replicates which lasted for four months from July to October. In order to monitor the clogging in a limited time, 0.5 g/l of chalk was added to the water reservoir of the system. After 12, 36, 84 and 132 hours of the system operation, the clogging percentage of 4 l/h-emitter was 1.49, 1.12, 1.14, and 1.07 times more than the clogging percentage of 8 l/h-emitter. Discharge reduction in emitters under higher operating pressure was less than that in emitters under lower operating pressures. After 132 hours of system operation, the clogging percentages in emitters under operating pressures of 1.0, 2.0 and 3.0 bar were 91, 86 and 17, respectively. The effect of irrigation management method in treatments under operation pressure of 1.0 and 2.0 bar did not show a clear trend. Although, there was no meaningful difference between experimental treatments in emitters under 3.0 bar operating pressure, but in those with less flow interruption per the same operating time, less clogging was observed.
Abbasi, F., Sohrab, F. and Abbasi, N. (2016). Evaluation of Irrigation Efficiencies in Iran. Irrigation and Drainage Structures Engineering Research,17 (67), 113-128. (In Farsi)
Ayers, R. S. and Westcot, D. W. (1985). Water quality for agriculture (Vol.29). Rome: Food and Agriculture Organization of the United Nations.
Du Toit, D. C. (2011). Food Security by Directorate Economic Services, Production Economies Unit. Gen reports.
Ebrahimi, H., Golkarhamzee, H., Tavasoli, F. and Nazarjani, M. (2012). Evaluation of Emitter Clogging in Trickle Irrigation with Wastewater. Journal of Basic and Applied Scientific Research, 2(5), 5288-5291.
Farzamnia, M. and Haghayeghi Moghadam, S. (2010). Investigating the effect of saline water on the clogging of some emitters used in Iran. Science and Engineering of Irrigation, 32(1), 17-25. (In Farsi)
Geerts, S., Raes, D. and Garcia, M. (2010). Using AquaCrop to derive deficit irrigation schedules. Agricultural Water Management, (98), 213-216.
Hanjra, M. A. and Qureshi, M. E. (2010). Global water crisis and future food security in an era of climate change. Food Policy, 35(5), 365-377.
Karami, O., Hooshmand, A. and BoroomandNasab. S. (2014). The Chemical Clogging and its Effects on Hydraulic Performance of Different Types of Emitters with Different Flow Rates using Water of Karoun River. Science and Engineering of Irrigation, 38(3), 73-87. (In Farsi)
Lindsay, W.L. (1979). Chemical equilibria in soils. New York, NY: John Wiely & Sens, 449 p.
Marin-Cruz, J., Garcia-Figueroa, E., Miranda-Hernández, M. and González, I. (2004). Electrochemical treatments for selective growth of different calcium carbonate allotropic forms on carbon steel. Water Res. (38), 173-183.
Molden, D., Oweis, T., Steduto, P., Bindraban, P., Hanjra, M. A. and Kijne, J. (2010). Improving agricultural water productivity: Between optimism and caution. Agricultural Water Management, 97(4), 528-535.
Nasrollahi, A. H. 2010. Evaluation of effect temperature on the several kinds of emitter discharge that exist in the market of Iran. MSc. Dissertation, Shahid Chamran University of Ahwaz, Facualty of Water Science Engineering. (In Farsi)
Piri, H. (2007). Technical evaluation of drip irrigation systems implemented at Sarbaz County level. MSc. Dissertation, Shahid Chamran University of Ahwaz, Facualty of Water Science Engineering. (In Farsi)
Rosegrant, M. W. and Ringler, C. (2000). Impact on food security and rural development of transferring water out of agriculture. Water Policy, 1(6), 567-586.
Samadi, M., Khoshravesh, M. and Gholami Sefidkoohi, M. A. (2018). Investigation the Effect of Electromagnetic on Emitters Clogging at Irrigation with Agricultural Wastewater. Iranian Journal of Irrigation and Drainage, 2(12), 355-364. (In Farsi)
Wu, B., Jiang, L., Yan, N., Perry, Ch. and Zeng, H. (2014). Basin-wide evapotranspiration management: concept and practical application in Hai Basin, China. Agricultural Water Management, (145), 145-153.
Zamaniyan, M., Fatahi, R., Boroomand-Nasab, S., Shamohammadi, S. and Parvanak, K. (2013). Evaluation of emitters and water quality in trickle irrigation systems under Iranian conditions. International Journal of Agriculture and Crop Sciences, 5(15), 1632-1637.