The objective of the research is to obtain a math relationship for allowable intensity of artificial rain at irrigation of different types of soil. Experiment data on allowable technological parameters of sprinkler irrigation were generalized. Those parameters were allowable intensity of artificial rain and related to it allowable duration of continuous sprinkler irrigation. Experiment data containing the values of rain intensity and irrigation event duration for different soil conditions at an average drop diameter of artificial rain 0.9–1.0 mm enable to obtain a math relationship which describes functional relation of these parameters. System of experiment relationships obtained for a wide range of soil, topographic, and phenological conditions of irrigated site was presented. Relationships proposed allow obtaining calculation values of intensity of artificial rain for irrigation of sand, sandy loam, loam, and clay soils in a wide range of slopes of bare and covered agricultural lands. The established and math functional relationship between allowable intensity of artificial rain and allowable duration of irrigation event enables with acceptable accuracy (up to 8 %) for practice to determine interrelated ratio of technological irrigation parameters mentioned for a wide range of soil, topographic, and phyto-protective conditions of irrigated agricultural lands.
Keywords: artificial rain, sprinkler irrigation, intensity of rain, duration of irrigation event, field capacity, infiltration rate, soil layer.
