ABSTRACT
Figure 5.1 shows the pore space available for flow in two highly idealized soil models: regular cubic and rhombohedral. It is seen that even for these special cases, the pore space is not regular, but consists of cavernous cells interconnected by narrower channels. Pore spaces in real soils can range in size from molecular interstices to tunnel-like caverns. They can be spherical (as in concrete) or flat (as in clays), or display irregular patterns that defy description. Add to this the fact that poresmay be isolated(inaccessible) or interconnected (accessible from both ends) or may be dead-ended (accessible through one end only).
