Full macropore flow

In the Full Macropore option, macropores are defined as a secondary, addi­tional continuous pore domain in the unsaturated zone, besides the matrix pore domain representing the microporous bulk soil. Macropore flow is initi­ated when the capillary head in the micropore domain is higher than a thresh­old matrix pressure head, corresponding to the minimum pore size that is considered as belonging to the macropore domain. Water flow in the macrop­ores is assumed to be laminar and not influenced by capillarity, thus corre­sponding to gravitational flow.