PARAMETERS FOR RAIN SPRINKLER MACHINES AND RAINFALL DISTRIBUTION INDICATORS

Abstract

There is offered the simulation method for sprinkling devices application on different mode operating irrigation machines, working in movement, when the uniform irrigation depth should be ensured. In justifying the calculation method, the following provisions were adopted as the initial working hypothesis: the use of sprinkler devices on sprinkling equipment, which include any devices that generate artificial rain with characteristics suitable for irrigation. These can be sprinklers and nozzles; uniform irrigation is carried out, if in any part of the seasonal load area of the machine its spray equipment is provided with a hydraulic module q_i equal to the calculated q_р; the method of spraying devices selection and the assessment of irrigation uniformity should be consistent with each other. As a result of continuation of the previously completed work a mathematical description of the conditions was adopted that ensure evenness of rainfall distribution by sprinkling machines. The analysis of irrigation uniformity values has proved their matching to the simulation of sprinkling devices application conditions. It is proved that shown indices could be evaluated by the distribution of supplied hydro modules values, by using well-known rating formula and frequency plots. Additional effectively irrigated area outside the irrigation machine pipeline extension is calculated by the radius or efficient irrigation width; they are evaluated in accordance with the given method.