Desempenho hidráulico e recuperação de gotejadores do tipo labirinto com ondas ultrassônicas.

Abstract

The use of wastewater in drip irrigation may result in changing the quality of implementation of issuers. The quality control statistic is used to determine whether processes have adequate variability for use, can be used in any process, including irrigation. The charts Shewhart and capability process index are the first and most robust statistical control tools. The aim of this study was to determine whether the quality of the labyrinth drippers emissions when operating at different pressures with fresh water and sewage wastewater. The study was conducted at the National Institute for Semi-Arid - INSA - Campina Grande - PB, Brazil. The design was a factorial 3 x 2 x 6, with 3 models driplines named A, B and C, two types of water supply (AA) and wastewater (AR) and 6 head pressures P1, P2, P3 , P4, P5 and P6. At each level of pressure they were obtained 25 flows for each dripper tube model. With the flows were generated characteristic curves for each tube and type of water and calculated if the capability process index (Cp). With the objective of verifying whether there was a statistical difference of the response variable (Cp) and the factors proceeded with analysis of variance and design of control charts. The analysis of variance indicated interaction factors between the drip tube type and water. a middle comparison test was made in each tube for the two types of water and a significant difference between the quality of water applied to drip tube ep B. The average value Cp was 1.57 to 1.33 AA and RA respectively. The average values of Cp were 1.81 for the B tube being the most suitable to apply wastewater followed by the C tube Cp 1.49 and 1.04 tube A.