Modeling a Rotation Supply System in a Pilot Pressurized Irrigation Network in the Jordan Valley, Jordan |
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| Authors: | Nassim Al-Abed Emad Shudifat Jumah Amayreh |
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| Institution: | (1) Department of Agricultural Engineering & Technology, Jordan University of Science & Technology, P.O. Box 3030, Irbid, 22110, Jordan |
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| Abstract: | Many farmers in the Jordan Valley have switchedfrom traditional surface irrigationto pressurized irrigation systems. Inorder for these pressurized irrigationmethods to be effective, farmers must have adequate flow andpressure at each FarmTurnout Assembly (FTA). No on-demandirrigation concept has yet been implemented inthe Jordan Valley, and the rotation concept is still in use today. The JordanValley Authority (JVA) is the agency responsiblefor the distribution of water to farmers in the Valley. JVA engineers wereused to implement the irrigation rotationschedule, without any attention being paid to itseffect on the pressure in the network. Using MS Excel, a computer spreadsheet model was createdto examine the effect of selected rotation on thepressure in the network. This model was called theTurnout Pressure Simulation Program (TPSP).The TPSP model was used to map and identifyfarms that will incur pressure problems with any of the selected rotation schedules. This modelwas tested in the northern part of a pilotpressurized irrigation network known as TO2,and included 131 irrigated farm units (400 ha)located in Adassiyeh at the northern end of the Jordan Valley. The TPSP model was also usedto study illegal openings and the effect of these on the pressure in the network. The effect of four, eight, and 12 illegal openings was studied for a selectedrotation schedule, and an average reduction in pressure of 12%, 30%, and 44% was noted compared to when there were no illegal openings. |
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| Keywords: | irrigation modeling pressurized network rotation |
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