A Low-Cost Automated Test Column to Estimate Soil Hydraulic Characteristics in Unsaturated Porous Media

Figure 9

Water flux, , in a transient state as a function of depth and time: (a) water flux simulated in a 3D plot showing upper boundary flow ( = 0 cm), lower boundary flow ( = 100 cm), and water flux at bottom of the drop counter ( = 60 cm); (b) the same curves as in (a) (left axis) and the cumulative water flux measured in the drop counter and simulated by Hydrus-1D (right axis).

(a)

(b)