Vulnerabilidade de tubos gotejadores ao entupimento por precipitados químicos de ferro

Abstract

This research aimed to verifying the intensity of chemical precipitates in five different drip hoses models on water containing a high amount of total iron. The irrigation system was assembled with one reservoir of 1000 L, a set of motor pump of 0.5 cv, a 120 mesh filter disk, a test banch measuring where it was installed the drip hoses. The system was evaluated estimating the average flow rate, variation flow coeffícient (VFC), uniformity of distribution/emission and relative flow rate. It was possible to observe, during the days of the tests, and also at the end of the research (around 400 h of irrigation), that the chemical sediments of iron, deterioreted the performance of the drip hoses, promoting a great reduction in their flowing. The degree and the intensity of obstruction varied according to the model, observing that the makes which demanded more strictly fíltration (R and C), with a similar design aspects, labyrinths: R, Q and C, showed to be more susceptible to clogging problems. In the studies conditions it could be concluded, that the utilization of water, with that total iron concentration (3 mg.L-1), showed to compromise the irrigation performance.