Caracterização hidráulica de um tubo gotejador à baixa pressão.

Abstract

This work was developed to find a flow rate-pressure relationship of emitters operating at low pressure. Hydraulic characterization of low pressure system was necessary to smallholders using. So, tests were conducted at the Hydraulic Laboratory, Engineering Department in the “Universidade Federal de Lavras”, Minas Gerais – Brazil. The system was composed by one reservoir with water level at 3 meters high, 60 emitters in a dripline (model Hydrogol) and accessories. Flow rate was obtained step by step and the temperature was measured during the water evaluations, which tested pressures were between 3.90 and 34.92 kPa. The manufacturer variation coefficient (CVf) ranged between 1.98 and 4.10 %. The flow rate-pressure relationship was q = 0.08636.h0.5052 and its R2 = 0.9968, where “q” is the flow rate in L h-1 and “h” is the pressure in kPa.