Hydrogeology and
Soil Science
The void ratio of a soil is the ratio of the volume of the voids to the volume of the solids. So if in a cubic meter of saturated
soil there is 0.3m
3 of water, then the void ratio is 0.3/0.7. E.g.
e = Vv/Vs
This is contrasted with the soil
porosity, n, which is based on the volume of voids compared to the total volume. It is simple to convert:
e = n/(1-n)