Application of Leak 2D to Describe Preferential Water Flow in a Soil Containing Artificial Macropores

Leak 2D is a new two-dimensional dual permeability mathematical model for the simulation of preferential flow in vadose zone. In this model, water soil matrix domain described by h-based Richards’ equation. Water fracture estimated using kinematic wave approach. equation solved combination alternating direction implicit (A.D.I.) method and Douglas Jones predictor−corrector method. The explicitly. present paper, calibrated validated with data obtained Hele–Shaw apparatus filled sand. Preferential achieved inserting four artificial macropores various sizes into soil. Six irrigations intensities durations were used calibration validation process. content at depths was recorded five sensors that inserted A comparison simulated measured profiles shows can sufficiently describe unsaturated zone soil, even under extreme irrigation conditions.