HOSE SPRINKLERS FOR WATERING SMALL AREAS

The issues of evaluation of technological parameters of hose sprinklers (HS) operating in positions or in motion are considered. The following technological parameters: precipitation layer per pass, average rain intensity, effective irrigation coefficient and average diameter of raindrops were calculated in the course of theoretical studies. Experimental studies on determination of rain quality were conducted in Moscow region during irrigation of cabbage in cassettes and radish. Rain distribution was studied on two variants of HS working bodies in laboratory and production conditions. Irrigation radius by measuring with a tape the flight range of drops from HS nozzles and rain quality parameters were determined. Precipitation layer per pass was determined using 0.5 l rain gauges during operation of the sprinkler in motion at a pressure of 0.3 MPa. Studies of HS samples showed that when equipped for operation in motion, they provide water consumption of 0.56…0.60 l/s at a pressure of 0.2 MPa and 0.83…0.90 l/s at a pressure of 0.3 MPa; the movement of the SD samples should be carried out at a speed of 0.08 ... 1.0 m / min; the highest quality irrigation is achieved when arranging the SD with overlapping according to the scheme of 10x10 m; the rain layer per pass depends on the water pressure; the coefficient of effective irrigation at a pressure of 0.2 MPa and when arranging every 21 m was 0.74. Technical and economic calculations confirm the high economic efficiency of the created technical means, ensuring a reduction in capital costs by 60%. The DM-1 SD has passed state tests and is recommended for serial production. Hose sprinklers of the DS-0.6 and DS-1 type and their modifications for irrigation of small areas (up to 1 ha) on the basis of the conducted research and tests will find wide application in sprinkling irrigation of various agricultural crops in farms, gardening, household and individual farms.