Authors: Hassan E. Alsayim and Amir B. Saeed
Field performance tests were made during seasons (2007/2008) for two center pivot sprinkler irrigation systems. The two systems located at Jordanian Bashair agricultural projects and Elgrahaish valley Darmali, River Nile State, Northern Sudan. A simulation model, Center Pivot Model (CPM) was developed for managing and evaluating the performance factors of the center pivot sprinkler irrigation systems. Two grown crops, alfalfa and onion were tested under the Jordanian Bashair agricultural projects and Elgrahaish valley systems. Two radial rows of catch containers and their holders spacing 4 meters were set up and then field data for performance evaluation of systems were determined. The performance indicators discussed included total available water, crop evapotranspiration, irrigation intervals and system water application depth. The results obtained were found to be 49 mm, 9.3 mm day- days and 70 mm for the Jordanian Bashair system and they were 49 mm, 8.9 mm day- , 6 days and 70 mm for Elgrahaish system, respectively. The systems’ discharges were 227.2 m hr- for the Jordanian Bashair and 318.8 m hr- for Elgrahaish system. The actual systems hydraulic indicators calculated were the coefficient of uniformity (CU) and distribution uniformity (DU). For the Jordanian Bashair system they were 77.3 and 69.6 percent and they were 82.8 and 48.3 percent for Elgrahaish system, respectively.