scholarly journals Quality-control design for surface-water sampling in the National Water-Quality Network

2018 ◽  
Author(s):  
Melissa L. Riskin ◽  
David C. Reutter ◽  
Jeffrey D. Martin ◽  
David K. Mueller
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Surface Water ◽  
Control Design ◽  
Water Sampling ◽  
National Water

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

2012 ◽  
Vol 32 (5) ◽  
pp. 951-960 ◽  
Author(s):  
Franciele A. C. Follador ◽  
Márcio A. Vilas Boas ◽  
Marlise Schoenhals ◽  
Eliane Hermes ◽  
Clovis Rech
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Surface Water ◽  
Water Samples ◽  
Control Charts ◽  
Field Research ◽  
Surface Water Quality ◽  
Small Samples ◽  
Cusum Control Charts

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.

Sign in / Sign up

Export Citation Format

Share Document