Friction Head Loss in Center-Pivot Laterals with the Lateral Divided into Several Reaches

This paper presents efficient closed form expressions, based on the discrete outflow distribution, to compute the friction head loss and the friction correction factor in center-pivot laterals divided into several reaches. Since such formulas cannot be found in the literature, we develop these expressions based on the discharge required by each sprinkler and each reach to irrigate an annular area. These expressions can be used in center-pivot...