Simulação da distribuição espacial da uniformidade de aplicação de água em irrigação por pivô central.

Abstract

Traditional calculation of distribution uniformity as a basis for hydraulic design evaluation may not be appropriate for chemigation with center pivots. Recent development in site – specific crop management requires the spatial distribution of water and nutrient inputs to the fields. A two-dimensional interpolation algorithm has been developed to build these spatial distribution maps from a limited number of observations. A coefficient of uniformity is then calculated from the application depth distribution and compared with Heermann-Hein’s coefficient of uniformity, from both catch-can test data and computer simulation data area west of the Paraná. The results showed that the interpolated coefficient of uniformity, is comparable to Heermann-Hein’s but more robust at larger catch-can spacing.