Environmental Engineering Reference

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There is significant qualitative correlation between
S
and total hardness (TH). In

the contour map shown in Fig.
4b
in the eastern region the contours of high longitu-

dinal unit conductance match well with contours of higher values of total hardness.

Similarly in the western region low values of contours of
S
match significantly with

low values of contours of total hardness. Figure
4b
shows the correlation of
S
vs

TH. There is a remarkable direct relation between
S
and TH. The correlation coef-

icient
r
2
is 0.4025 which amounts to 64 %. Hence one of the parameters can be

quantitatively estimated if either is known.

In the contour maps shown in Fig.
5a
, there is total correlation between contour

pattern of
S
and Na. Contours showing higher values of Na match remarkably with

contours showing higher values of
S
significantly in space. Similarly, contours

showing lower values of Na in space match well with lower values of contours of
S
.

In the contour maps shown in Fig.
5a
, white tone represents higher values and darker

tone represents lower values of parameters namely
S
and Ca. It is clearly observed

that high level contours of
S
match with high level contours of calcium and vice-

versa. Hence there is direct qualitative relationship between
S
and Ca.

Figure
5b
shows a direct correlation of
S
vs Na. The correlation coefficient
r
2
is

0.3236, which amounts to 56 %. Figure
5c
shows correlation between
S
and Ca. The

correlation coefficient
r
2
which is 0.3709 and amounts to 61 % shows a significant

quantitative relationship between
S
and calcium. Hence one of the parameters can

be quantitatively estimated if either is known.

In Fig.
6a
the contours of specific conductance and longitudinal unit conductance

are shown. The contours in the white tone are higher values, and the contours in

grey and black tones are lower values of the parameters. There is total match of

white grey and dark areas in the map of
S
with white grey and dark areas observed

in the map of specific conductance. Hence, there is a significant qualitative relation-

ship between
S
and specific conductance. Specific conductance increases with

increase in the values of
S
and vice-versa. Figure
6b
shows the correlation of
S
and

specific conductance, the correlation shows a direct relation between
S
and specific

significant. Hence one of the parameters can be quantitatively estimated if either is

known. In Fig.
6a
in the contour map, white tone indicates higher values, and the

contours in grey and black tones indicate lower values. There is significant qualita-

tive relationship between
S
and sodium adsorption ratio, because the grey and white

tone regions match significantly with each other. Figure
6c
shows correlation of
S
and

sodium adsorption ratio, a direct relationship is observed between these parameters.

The correlation coefficient
r
2
is 0.4662 which amounts to 68 % which is significant.

Hence, one of the parameters can be quantitatively estimated if either is known.

In Fig.
7a
the contour map shows that except a minor discrepancy, the correlation

in the north central parts of the study areas, a complete match between the patterns

of contours
S
and Cl can be observed. Figure
7b
shows that the quantitative relation

of
S
and Cl is almost direct. The correlation coefficient
r
2
is 0.4688 which amounts

to 68 %. Hence, one of the parameters can be quantitatively estimated if either is

known. In Fig.
7a
the nitrate contour map indicates the correlation in the north cen-

tral parts of the study area, there is complete match between
S
and nitrate. In Fig.
7c

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