Performance evaluation of new irrigation systems in Hamedan

Document Type : Research Paper


1 Professor, Department of Water Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

2 Graduated Master Student, Department of Water Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

3 Assistant Professor, Department of Water Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

4 Assistant Professor, Soil and Water Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran.


Evaluating the performance of pressurized irrigation systems is one of the important strategies for managing farm water consumption. In this study, 5 sprinkler irrigation systems, 5 drip irrigation systems and 2 tape drip irrigation systems were selected for technical and hydraulic evaluation in agricultural lands of Hamedan. Evaluations were based on the Merriam and Keller method. Measured indices for sprinkler irrigation systems included Christiansen uniformity coefficient (CU), distribution uniformity (DU), potential application efficiency of low quarter (PELQ) and application efficiency of low quarter (AELQ). Also, Indicators measured for drip irrigation systems included uniformity factor (EU), efficiency reduction factor (ERF), potential application efficiency of low quarter and application efficiency of low quarter. The values of CU, DU, PELQ and AELQ for sprinkler irrigation systems were 65.6-80.1, 53.1-65.4, 31.1-55.7 and 28.3-52.5 percent, respectively. Also, the values of EU, ERF, PELQ and AELQ for drip irrigation systems were obtained in the range of 43.4 to 65.7, 0.8 to 1.3, 39.1 to 59.1 and 34.0 to 73.0 percent respectively. The results showed that in all systems the efficiencies under study were lower than expected, which can be attributed to improper design, the difference between the implemented system and the designed system, the impact of climatic factors such as high wind speed, operational problems such as the lack of adjust pressure by farmers, the use of inappropriate equipment and the lack of periodic reviews due to low levels of awareness, the lack of education and economic failures.


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