Study on the Stability of Slopes Reinforced by Composite Vegetation Combined with a Geogrid under Rainfall Conditions

Table 2

Hydraulic characteristic parameters of the soil.

Material	Fitting parameter a (kPa^−1)	Fitting parameter n	θr (m^3/m^3)	θs (m^3/m^3)	ks (10^−6 m/s)
Plain soil	0.114	1.806	0.017	0.45	3.29
Shrub reinforced soil	0.176	1.798	0.018	0.456	3.18