Geological Hazards in Loess Induced by Agricultural Irrigation in Arid and Semiarid Regions of China

Table 2

Material parameters of the model [1, 2].

Title	Weight ρ/kN (m^3)	Elasticity modulus E (MPa)	Poisson’s ratio μ	Porosity	Permeability coefficient (m/d)		Cohesion c (kPa)	Internal friction angle φ (°)	Suction friction angle φ^b (°)
					Vertical	Horizonal
Loess	15.2	46	0.35	0.51	0.12	2.4e − 2	14.5	16.8	15.1
Silty clay	19.5	90	0.3	0.30	2e − 4	2e − 4	60.0	22.0	—
Sand and gravel	20.0	140	0.3	0.40	2.0	2.0	—	—	—
Sandy mudstone interbedding	22.0	200	0.3	0.10	1e − 5	1e − 5	—	—	—