Avaliação estatística do desempenho de sistemas drenantes com relação à resistência e carga hidráulica de entrada.

Abstract

It was evaluated the performance of three types of envelope, used in the agricultural land drainage, that were installed around tubular drains in a horizontal sand tank model. It is believable that the drain systems, of which drain pipe has a bigger number of perforation lines (flexible tube and smooth PVC) and a larger inlet area (ceramic tube), have influenced to reduce the entrance resistance. The increase in this parameter, verified for the drain system composed of ceramic tube without envelope, induced to a higher convergence of the flow lines close to the tube.