Constant and Variable Operating-Angle Sprinklers for Traveler Irrigation

Abstract

ABSTRACT DIGITAL simulations were used to determine the amount of water applied by a traveler irrigation system. The simulations included an initial stationary set (travel delay) to provide additional water behind the start position of the traveler. A comparison of two series of simulations was made to determine the potential of utilizing an alternate sprinkler operating angle during the initial delay period. This was accomplished by conducting one series of simulations with a constant sprinkler operating angle and a second series with differing sprinkler angles for the delay and travel periods. Required delay time, uniformity of application and the volume of water applied beyond the effective field boundary were used as the performance criteria used in the comparison. Results show that, under certain conditions, uniformity can be improved in this initial set area if the angle of rotation during the initial delay period is smaller than the angle of rotation at which the sprinkler travels through the field.