IJPAM: Volume 87, No. 3 (2013)

MULTIPLE LINEAR REGRESSION EQUATION FOR
CHLORIDE ESTIMATION OF THE GROUNDWATER
FOR CHANTHABURI, THAILAND

Jatupat Mekparyup$^1$, Kidakan Saithanu$^2$, Preeyarat Naksuwan$^3$,
Mattika Hongboonme$^4$, Thaned Rojsiraphisal$^5$
$^{1,2,3,4}$Department of Mathematics
Faculty of Science
Burapha University
Chonburi, 20131, THAILAND
$^5$Department of Mathematics
Faculty of Science
Chiang Mai University
Chiang Mai, 50200, THAILAND


Abstract. The objective of this study is to estimate Chloride of the groundwater in Chanthaburi, Thailand using multiple regression analysis. The multiple linear regression equation proposed in this study related to Chloride, Total dissolved solids, Iron, Nitrate and Total hardness data which are obtained from the Department of Groundwater Resources, Thailand. Results shows that the best fitted equation to estimate Chloride ($y$) of the groundwater in Chanthaburi relates to Total dissolved solids ($x_1$) and Total hardness ($x_4$). It can be estimated by

\begin{displaymath}\widehat{log (y)} =1.22026+0.0050531 x_1 -0.0019421x_4 \end{displaymath}

with adjusted coefficient of determination $0.607$ and standard error of estimation $0.717$.

Received: June 25, 2013

AMS Subject Classification: 62J05

Key Words and Phrases: multicollinearity, variance inflation factor, standard of groundwater quality, total dissolved solids, total hardness

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DOI: 10.12732/ijpam.v87i3.8 How to cite this paper?
Source: International Journal of Pure and Applied Mathematics
ISSN printed version: 1311-8080
ISSN on-line version: 1314-3395
Year: 2013
Volume: 87
Issue: 3