Tabular cusum control charts of chemical variables applied to the control of surface water quality

Engenharia Agrícola

Franciele A. C. Follador²  Márcio A. Vilas Boas²  Marlise Schoenhals¹  Eliane Hermes¹  Clovis Rech¹ 

[1] ,Universidade Estadual do Oeste do Paraná

关键词: environmental planning;    control charts;    water quality;    planejamento ambiental;    cartas de controle;    qualidade da água;   

DOI  :  10.1590/S0100-69162012000500014

来源: SciELO

【 摘 要 】

The aim of this study was to evaluate the application possibility of tabular CUSUM control charts in the quality control of chemical variables in surface water. It was performed bibliographic and field research to collect water samples from 2003 to 2009, totaling 30 samples, some monthly and others semi-annual in order to observe the variables that regulate water quality. It was found that these charts may be applied to control the quality of river water; showing to be effective in the perception of changes during the process, especially for small samples (n=1) which there is no repetition as in this research. It was also concluded that the Mandurim River does not presents significant levels of pollution.

【 授权许可】

CC BY   
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