Laboratory Experiments on the Effect of Microtopography on Soil-Water Movement: Spatial Variability in Wetting Front Movement

Table 1

Basic Experimental Information and Soil Properties.

Exp^1	Soil^2	Surface description^3	Surface size(s) (cm)	𝜃^4𝑖 (cm^3/cm^3)	𝜌^5𝑏 (kg/m^3)	𝑟^6 (cm/hr)	Surface slope (%)	Duration (min)
S1	LS	Combined R & S	30 × 30	0.063	1,400	3.80	0	12
S2	LS	Combined R & S	30 × 30	0.059	1,400	3.80	0	20
S3	LS	Combined R & S	30 × 30	0.080	1,400	3.80	0	40
S4	LS	Combined R & S	30 × 30	0.064	1,400	3.80	0	60
L5	LS	Separate R & S	60 × 100	0.144	1,400	5.79	7	78
L6	LS	Separate R & S	60 × 100	0.073	1,400	5.79	7	120

¹ S is the small soil box (30 × 30 cm) and L is the large soil box (120 × 100 cm).
² LS is the loamy sand soil.
³ R signifies rough surface features and S signifies smooth surface features.
⁴ 𝜃_𝑖 is the initial moisture content.
⁵ 𝜌_𝑏 is the bulk density.
⁶ r is the rainfall intensity.