Effects of the Grain Size on Dynamic Capillary Pressure and the Modified Green–Ampt Model for Infiltration

Table 1

Geometric mean grain size, porosity, bulk density, and saturated hydraulic conductivity for column experiments with different ponding heights.

Materials	Geometric mean grain size, d50 × 10^−4 (cm)	Water ponding height, hw (cm)	Bulk density, ρb (g·cm^−3)	Porosity, ϵ (cm^3·cm^−3)	Mobile water content, Δθ (cm^3·cm^−3)	Saturated hydraulic conductivity, Ks × 10^−2 (cm·s^−1)
B35		10	1.36 ± 0.006	0.46 ± 0.003	0.44 ± 0.011	19.68 ± 0.683
	451	20	1.36 ± 0.002	0.46 ± 0.001	0.42 ± 0.006	18.35 ± 0.132
		40	1.36 ± 0.017	0.46 ± 0.007	0.43 ± 0.006	18.37 ± 1.591
B60		10	1.43 ± 0.003	0.43 ± 0.001	0.41 ± 0.014	6.53 ± 0.202
	348	20	1.42 ± 0.005	0.43 ± 0.002	0.39 ± 0.003	6.42 ± 0.079
		40	1.42 ± 0.008	0.43 ± 0.003	0.39 ± 0.003	6.50 ± 0.393
B150		10	1.38 ± 0.004	0.45 ± 0.002	0.40 ± 0.001	1.21 ± 0.024
	138	20	1.38 ± 0.007	0.45 ± 0.003	0.40 ± 0.005	1.16 ± 0.055
		40	1.39 ± 0.000	0.45 ± 0.000	0.42 ± 0.021	1.42 ± 0.391
B320		10	1.36 ± 0.004	0.46 ± 0.002	0.39 ± 0.007	0.08 ± 0.003
	13	20	1.34 ± 0.013	0.47 ± 0.005	0.44 ± 0.040	0.11 ± 0.026
		40	1.33 ± 0.006	0.47 ± 0.002	0.42 ± 0.036	0.10 ± 0.028