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Table 4 The values of the parameters for the slope simulation

From: Investigation for the initiation of a loess landslide based on the unsaturated permeability and strength theory

Strata

Q3 loess

Q2 loess

Q1 loess

Sandstone

Elastic module E/(kPa)

102

103

103

105

Poisson’s ratio ν

0.35

0.35

0.33

0.20

Effective friction angle φ′/(°)

0.0

25.0

30.0

45.0

Friction angle related to suction φ b/(°)

0.0

195.

25.3

-

Saturated effective cohesion c′ 0/(kPa)

3.0

3.5

5.0

1000

Density γ/(g/cm3)

1.65

1.86

1.89

2.45

Saturated permeability K/(m/d)

0.110

0.044

0.027

-

Initial moisture content w 0/(%)

16.8

20.5

19.9

-

Initial volumetric moisture content θ 0 /(%)

24.0

31.6

31.4

-

Initial matric suction (u a -u w \0/(kPa)

18.3

9.2

25.1

-