Statistical process control in self compensating emitters using water at different saline concentrations
| Autor: | Sabrina Cordeiro de Lima, Delfran Batista dos Santos, Rigoberto Moreira de Matos, PatrÃcia Ferreira da Silva, José Dantas Neto |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Irrigation
business.industry Natural resource economics 05 social sciences Environmental engineering Greenhouse 04 agricultural and veterinary sciences Statistical process control Saline water Soil gradation 0502 economics and business 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Control chart General Agricultural and Biological Sciences Shewhart individuals control chart business Quality assurance 050203 business & management |
| Zdroj: | African Journal of Agricultural Research. 11:2736-2743 |
| ISSN: | 1991-637X |
| DOI: | 10.5897/ajar2016.11214 |
| Popis: | The statistical process control applied in the irrigation systems allows the visualization of process to reduce wastage of inputs, such as water and energy quality, which contributes to assessing its proper functioning, and feasibility of implementation and operation. That is why it is necessary to evaluate the self-compensating emitters using saline water at different concentrations. This experiment was applied in the greenhouse, agricultural engineering academic unit, Federal University of Campina Grande. The treatments consisted of five salinity levels of irrigation water (ECwi) (0.6, 1.5, 2.5, 3.5 and 4.5 dS m-1 at 25°C), set in pressure of 160 kPa during 15 irrigation trials for new emitters, with 350 h of operation. The use of statistical process control tool has shown promise in identifying emitters’ problems due to the use of lower quality water for irrigation. The inferior quality of water does not influence the flow and Christiansen uniformity coefficient of self-compensating emitters, but after 350 h of operation, there is need management operations and maintenance of the system to be made. The uniformity coefficient Christiansen (CUC) for new and used emitters above 90% was rated as excellent in all treatments saline. The Shewhart control charts allowed diagnosing of about 350 h of operation which is necessary for the maintenance of the irrigation system when operating with saline water. Key words: Quality engineering, Shewhart charts, electrical conductivity. |
| Databáze: | OpenAIRE |
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