Geoscience Reference
In-Depth Information
Table 2.11 Depth wise distribution of water holding capacity, pore space and volumetric
expansion (%)
Location
Parameters
Depth of the soil (cm)
0
-
10
10
-
20
20
-
30
30
-
40
40
-
60
60
-
80
80
-
100
26.5 km from
Siliguri near
Tindharia (1)
Water
holding
capacity (%)
83.42
86.50
89.73
89.59
79.75
54.70
40.63
Pore
spaces (%)
43.51
47.29
59.40
52.30
30.75
29.21
21.65
Volume
expansion (%)
31.40
27.10
27.21
28.93
25.23
19.75
13.21
26.5 km from
Siliguri near
Tindharia (2)
Water
holding
capacity (%)
73.04
74.06
75.03
71.93
60.51
46.44
34.65
Pore
spaces (%)
45.02
46.51
50.31
46.42
34.73
27.53
24.39
Volume
expansion (%)
21.09
21.09
23.20
24.15
17.46
12.03
9.95
26.5 km from
Siliguri near
Tindharia
(sample-A-3)
Water
holding
capacity (%)
70.21
71.39
74.45
75.09
62.43
51.03
37.51
Pore
spaces (%)
52.40
59.31
50.43
42.36
37.05
29.00
26.74
Volume
expansion (%)
25.75
23.01
23.04
19.52
15.34
14.31
9.73
26.5 km from
Siliguri near
Tindharia
(sample-A-4)
Water
holding
capacity (%)
35.73
31.43
26.73
29.72
16.07
13.73
10.93
Pore
spaces (%)
76.72
75.92
71.39
53.03
50.92
56.43
49.02
Volume
expansion (%)
14.71
14.92
13.75
9.78
7.02
5.03
4.01
At Shiviter tea
estate
Water
holding
capacity (%)
45.45
41.25
35.50
32.55
27.30
22.53
10.93
Pore
spaces (%)
69.54
63.75
60.50
49.85
34.75
26.65
22.55
Volume
expansion (%)
34.55
29.45
28.58
19.55
13.25
11.50
9.57
At lower Pag-
lajhora
33.5 km from
Siliguri
Water
holding
capacity (%)
29.22
25.54
22.45
18.50
12.34
9.08
5.45
Pore
spaces (%)
86.75
85.62
81.35
73.93
60.12
46.53
39.82
Volume
expansion (%)
21.11
19.21
15.42
12.22
9.75
6.45
5.40
Source Basu and Sarkar (
1985
)
in organic matter, the pore space per unit volume will be high. In the present study a
comparison has been made between pore space, water holding capacity and volu-
metric expansion for few major landslide locational sites at different depth of soil
(Basu and Sarkar
1985
) and their role in slope instability have also been studied
(Table
2.11
).
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