The possibility of different emission uniformity combinations and land slope inside an irrigation sector enables different irrigation system design possibilities that result on different acquisition and operational costs. Taken as reference a well-designed microsprinkler irrigation, one can verify that linear programming (LP) is the best methodology for optimization of the system design, as compared to the other operational research methods, since in the LP algorithm, the global optimum solution for the variable pre-established is found. This work aimed to analyze the distribution of the hydraulic head on manifolds, under different uniformities of emission and land slope, by applying programming. The results found allowed a consistent analysis of the hydraulic parameters of the derivation line affecting the emission uniformity. A decreasing behavior of the hydraulic head variation along the derivation line is observed in all cases, occurring in higher intensity in the following emission uniformity order: 80% > 83% > 86% > 89% > 92%. In addition, points of lower hydraulic head for lines at 3% land slope are found in the eleventh exit for all emission uniformity tested.
irrigation; operational research; uniformity
