Technical Evaluation of Drip Irrigation Systems Implemented in Bushehr Dashtestan City

In order to determine the optimal performance of drip irrigation systems, their performance must be evaluated. In this study, five drip irrigation systems in Bushehr province were evaluated. A working manifold was selected from each system, and the evaluations were performed on four laterals from the beginning, one third, two thirds, and end of the lateral. At each selected manifold, eight pressures were obtained at the beginning and end of the lateral tube and 32 volumes of water at 16 trees. The average volumes of emitters and dispersion uniformity were calculated from the obtained volumes. The minimum input pressure of the experimental manifold and the operating manifolds were also measured to determine the Efficiency Reduction Factor (ERF) and the DCF. After collecting data from field measurements using scs and maryam and chlorine methods, evaluation factors such as water emission uniformity (EU), real low quadrant use efficiency (AELQ) and potential yield The lower quadrant (PELQ) was calculated. The results showed that water distribution uniformity varied from 77.98% in M5 to 92.12% in M3. Low quadrant potential (PELQ) efficiency with 82.91 and 70.18% and true low quadrant use efficiency (AELQ) with values of 92.12 and 77.98% were obtained in M3 and M5 systems, respectively. Indicates good to moderate status in these systems. In general, the main problem of the systems under study is the low level of wetting due to the make-up and the inappropriate number of drops, the lack of proper placement of loop rings, the lack of uniformity of pressure distribution in the system, and the lack of irrigation water, the distribution of air and the low knowledge and skill of the user.