Desempenho e eficiência de aplicação de água de mini canhão de irrigação com diferentes diâmetros de bocais

Abstract

The use of water for irrigation purposes is a subject widely discussed among researchers and civil society, considered a practice that consumes large amounts of water every year during the harvest. Thus, the search for more efficient irrigation systems in relation to water use, is of fundamental importance, since it seeks to mitigate factors that lead to reduced availability of natural resources. The objective of this study was to determine the quality of existing conventional irrigation systems in high-Uruguay region, through the choice of three properties in order to verify the performance and uniformity of application of water spray mini cannon Plona KS1500 under different nozzle diameters . Was performed quadricuçaçao area around the sprinkler, forming a quadrant 2636 m. In the center of each square was placed one rain gauge for the collection of applied laminates. Measurements of the pressure of the sprinkler, speed and wind direction, humidity and air temperature were also made at the time of each repetition, to the nozzle of 12 mm, 14 mm and 16 mm, and each review was 20 minutes. Through the return value from the collections were calculated: CUC (62.8 to 68.2%); CUD (43.1 to 47.7%); CUE (51.5 to 58.3%); CUE (51.5 to 58.3%); CUH (45 to 48.8%); And (85.1 to 89.8%); Ed (61-66%); Hey (42.3 to 60.8%) and UDH (53 to 60.3), with the exception of Ea showed good parameters for the system in the different nozzles. The rest of the indices and coefficient obtained showed poor to unacceptable rating of the different diameter nozzles by the conventional system featuring maldistribution of water sprayed by the issuer. Indexes and coefficients calculated were compared with the measured wind speed during assessments, finding a direct influence on the determination of the coefficients.