Control charts for monitoring drip irrigation with different hydraulic heads

  • Allan Remor Lopes Centro de Ciências Exatas e Tecnológicas. Programa de Pós-Graduação em Engenharia Agrícola. Departamento de Recursos Hídricos e Saneamento Ambiental. Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua Universitária, n° 2069, CEP: 85819-110, Cascavel, PR, Brazil.
  • Marcio Antonio Vilas Boas Centro de Ciências Exatas e Tecnológicas. Programa de Pós-Graduação em Engenharia Agrícola. Departamento de Recursos Hídricos e Saneamento Ambiental. Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua Universitária, n° 2069, CEP: 85819-110, Cascavel, PR, Brazil.
  • Felix Augusto Pazuch Centro de Ciências Exatas e Tecnológicas. Programa de Pós-Graduação em Engenharia Agrícola. Departamento de Recursos Hídricos e Saneamento Ambiental. Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua Universitária, n° 2069, CEP: 85819-110, Cascavel, PR, Brazil.
  • Diane Aparecida Ostroski Coordenação de Engenharia Civil. Universidade Tecnológica Federal do Paraná (UTFPR), Rua Cristo Rei, n° 19, Cep: 85902-490, Toledo, PR, Brazil.
  • Marta Juliana Schmatz Centro de Ciências Exatas e Tecnológicas. Programa de Pós-Graduação em Engenharia Agrícola. Departamento de Recursos Hídricos e Saneamento Ambiental. Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua Universitária, n° 2069, CEP: 85819-110, Cascavel, PR, Brazil.
Keywords: EWMA control chart, micro irrigation, Shewhart control chart, uniformity

Abstract

This study monitored a drip irrigation system with different hydraulic heads, using control charts. The study included 25 tests, and was conducted at the Experimental Nucleus of Agricultural Engineering of the State University of Western Paraná, located in the municipality of Cascavel, Paraná. The drip irrigation system was operated by gravity, and had four hydraulic heads (10, 11, 12 and 15 kPa). The uniformity of the system was determined based on uniformity distribution. Uniformity monitoring was performed using Shewhart and exponentially weighted moving-average (EWMA) control charts. An increase in the hydraulic head increased uniformity. The use of 12 and 15 kPa hydraulic heads yielded good performance, whereas 10 and 11 kPa yielded regular performance. The use of control charts proved to be efficient; the Shewhart control chart was more robust, whereas the EWMA control chart, which indicated trends and deviations not shown by Shewhart control charts, was more sensitive.


Published
08/07/2020
Section
Papers