Environmental Engineering Reference
In-Depth Information
Ta b l e 5 . 5
Results obtained for measurements on sand samples mixed with deionized water,
at ten different moisture levels. The estimated values for σ
0
,
C
−
S
; σ
0
,
TLM
;andσ
0
,
ICM
and for
the corresponding standard uncertainties are compared
θ
σ
0
,
C
−
S
σ
0
,
TLM
σ
0
,
ICM
(mS m
−
1
)
−
1
)
−
1
)
(%)
(
S
(
S
0.0
-
0.0
-
.
±
.
.
±
.
2.0
0
6
0
1
0.8
0
7
0
1
4.0
1
.
4
±
0
.
1
1.6
1
.
6
±
0
.
1
6.0
2
.
6
±
0
.
2
2.9
2
.
9
±
0
.
1
9.1
3
.
6
±
0
.
3
4.1
4
.
0
±
0
.
1
12.1
4
.
2
±
0
.
3
4.7
4
.
6
±
0
.
1
15.1
5
.
7
±
0
.
4
6.4
6
.
3
±
0
.
1
18.1
7
.
3
±
0
.
6
8.1
8
.
0
±
0
.
2
21.1
11
.
5
±
0
.
9
12.7
12
.
4
±
0
.
3
24.4
15
.
7
±
1
.
2
17.3
16
.
9
±
0
.
4
Ta b l e 5 . 6
Results obtained for measurements on sand samples mixed with salted water, at
ten different moisture levels. The estimated values for σ
0
,
C
−
S
, σ
0
,
TLM
and σ
0
,
ICM
and for the
corresponding standard uncertainties are compared
θ
σ
0
,
C
−
S
σ
0
,
TLM
σ
0
,
ICM
(mS m
−
1
)
−
1
)
−
1
)
(%)
(
S
(
S
0.0
-
0.0
-
2.0
0
.
8
±
0
.
1
1.0
1
.
0
±
0
.
1
4.0
2
.
5
±
0
.
2
2.8
2
.
7
±
0
.
1
6.0
4
.
1
±
0
.
3
4.6
4
.
5
±
0
.
1
9.1
6
.
3
±
0
.
5
7.0
6
.
9
±
0
.
2
12.1
9
.
9
±
0
.
8
11.0
10
.
8
±
0
.
3
15.1
14
.
3
±
1
.
1
15.8
15
.
6
±
0
.
4
18.1
20
.
2
±
1
.
5
22.3
21
.
8
±
0
.
5
.
±
.
.
±
.
21.1
30
7
2
3
33.8
33
0
0
8
24.5
41
.
5
±
3
.
1
45.6
44
.
6
±
1
.
1
Finally, it must be pointed out that the
K
p
,
C
−
S
was evaluated through nine pre-
liminary measurements on the electrolyte solutions, and it was found that
u
Kp
,
C
−
S
increases dramatically when less than nine points were considered for the linear re-
gression. Conversely, only two preliminary measurements were enough to obtain an
accurate estimation of the probe constant through the ICM method. This is one of
the major advantages of the described methods.
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