A study was performed to evaluate the water distribution uniformity in a high pressure sprinkle system in the norte-fluminense region, RJ. The field experiment was carried out according to ASAE (1990) methodology. Christiansen uniformity coefficient (CUC) was used to evaluate the water application distribution uniformity, with sprinklers placed in rectangular and triangular spacings. For each one of these situations the CUC was analysed according to the following independent variables: wind speed and direction, operation pressure, spacings between sprinklers and lateral lines, and sprinkler speed rotation. The evaluation of data was made with multiple regression analysis, which made it possible to develop a statistical model to estimate the CUC. It was observed that the increase in wind speed and spacing between sprinklers reduced the CUC, while the increase in sprinkler pressure increased the CUC.
sprinkle; uniform; wind; weather
