Evaluating Sprinkler Irrigation System of Hasanlo Dam Irrigation network

Agricultural sector is the greatest user of water in Iran, and increase of the consumption efficiency is necessary by considering the limited water resources in the recent years. Hasanlu irrigation and drainage networks as a part of a larger project of Naghadeh plan is one of the country's largest projects in the field of development of pressurized irrigation systems. Hasanlu network supplies water to the systems of sprinklers, surface gravity irrigation, and hydroflums based on the available pressure head at the relevant sites. In this research, geographic information systems were used as a framework for storing, management, processing, analyzing and visualization of spatial information of Hasanlo project phase 1 to evaluate water management of this plan. For this purpose, the coefficient of uniformity and distribution uniformity in sprinkler irrigation calculation toolbox developed and added to GIS as an extension, to simulate and evaluate the single or multi riser uniformity tests. Also, the risers discharge and application pressure were recorded at the site during the operation of the project. Results indicated that the pressure of risers varied from 0.5 to 3.9 bar and average Christiansen’s coefficient of uniformity (CU) was under 50% that indicated poor water management in the farm level. Also the satisfaction of stakeholders was in medium level.