Investigation and Technical Evaluation of Solid set sprinkle irrigation systems of plain Kuhdasht

The objective of this study was to evaluate how the design and the management of solid set sprinkle irrigation systems in Koohdasht plain of Loreistan province. For this purpose, 10 solid-set sprinkle irrigation systems were evaluated .For evaluating of the selected systems, some performance indicators were used such as Christiansen’s coefficient of uniformity(CU), distribution uniformity(DU), potential application efficiency of low-quarter (PELQ), application efficiency of low-quarter(AELQ), wind drift and evaporation losses(WDEL), deep percolation losses(DP) and adequacy of irrigation(ADirr). The mean values of these parameters were obtained 70.84, 43.64, 46.85, 38.01, 8.77, 31.02 and 64.66%, respectively. All of systems have low PELQ values and also water distribution uniformity of them were lower than recommended values by Merriam and Keller. In 4 systems out of 10 systems, irrigation is complete and deficit irrigation occurred in the other systems so AELQ values were equal to PELQ. Unsuitable design and implementation of the systems were recognized as the most important reason of low PELQ. Synchronic utilization of many sprinklers and using rather than one sprinkler on lateral also were the most important reasons for low water distribution uniformity. In general, the results of this study showed that however in many of cases the design and executive problems were exist; but, a big share of the reason of low performance of sprinkle irrigation systems in koohdasht plain are the weak managing and operation of the systemsThe objective of this study was to evaluate how the design and the management of solid set sprinkle irrigation systems in Koohdasht plain of Loreistan province. For this purpose, 10 solid-set sprinkle irrigation systems were evaluated .For evaluating of the selected systems, some performance indicators were used such as Christiansen’s coefficient of uniformity(CU), distribution uniformity(DU), potential application efficiency of low-quarter (PELQ), application efficiency of low-quarter(AELQ), wind drift and evaporation losses(WDEL), deep percolation losses(DP) and adequacy of irrigation(ADirr). The mean values of these parameters were obtained 70.84, 43.64, 46.85, 38.01, 8.77, 31.02 and 64.66%, respectively. All of systems have low PELQ values and also water distribution uniformity of them were lower than recommended values by Merriam and Keller. In 4 systems out of 10 systems, irrigation is complete and deficit irrigation occurred in the other systems so AELQ values were equal to PELQ. Unsuitable design and implementation of the systems were recognized as the most important reason of low PELQ. Synchronic utilization of many sprinklers and using rather than one sprinkler on lateral also were the most important reasons for low water distribution uniformity. In general, the results of this study showed that however in many of cases the design and executive problems were exist; but, a big share of the reason of low performance of sprinkle irrigation systems in koohdasht plain are the weak managing and operation of the systemsThe objective of this study was to evaluate how the design and the management of solid set sprinkle irrigation systems in Koohdasht plain of Loreistan province. For this purpose, 10 solid-set sprinkle irrigation systems were evaluated .For evaluating of the selected systems, some performance indicators were used such as Christiansen’s coefficient of uniformity(CU), distribution uniformity(DU), potential application efficiency of low-quarter (PELQ), application efficiency of low-quarter(AELQ), wind drift and evaporation losses(WDEL), deep percolation losses(DP) and adequacy of irrigation(ADirr). The mean values of these parameters were obtained 70.84, 43.64, 46.85, 38.01, 8.77, 31.02 and 64.66%, respectively. All of systems have low PELQ values and also water distribution uniformity of them were lower than recommended values by Merriam and Keller. In 4 systems out of 10 systems, irrigation is complete and deficit irrigation occurred in the other systems so AELQ values were equal to PELQ. Unsuitable design and implementation of the systems were recognized as the most important reason of low PELQ. Synchronic utilization of many sprinklers and using rather than one sprinkler on lateral also were the most important reasons for low water distribution uniformity. In general, the results of this study showed that however in many of cases the design and executive problems were exist; but, a big share of the reason of low performance of sprinkle irrigation systems in koohdasht plain are the weak managing and operation of the systems of the systemsof the systemsof the systemsof the systemsof the systemsof the systems.