Ajuste de parâmetros para distorção da distribuição de água aplicada por canhões hidráulicos em condições de vento

Abstract

In windy conditions, water distribution through sprinklers systems may be compromised. Empirical procedures used to model water distribution by rain guns in windy conditions offer the best results. In the Richard &Weatherhead (1993) model, drift and range shortening in the sprinkler due to wind is described by six parameters. The aimed was to develop a mathematical model and a computational routine, written in Visual Basic 6, to adjust these parameters from data obtained in field tests of water distribution. To test the model and the application developed, data from field tests of the PLONA-RL250 operating in windy conditions with working pressures of 392 and 490 kPa and nozzle sizes of 18x5 mm and 18x7 mm were used. In the parameter adjustment done by the computational routine developed, variations between 2.168 and 3.611 mm h-1 were observed when comparing the measured and the estimated values. It is important to note that from the estimated parameters, it is possible to simulated water distribution values for the sprinkler operating under any wind direction or speed, as long as the speed is lower than the speed used to determine the set parameters.