GEOLOGY

Detailed explanation-1: -Porosity is a measure of how much water can be stored in geological materials. Almost all rocks contain some porosity and therefore contain groundwater.

Detailed explanation-2: -Water absorbency is a measure of the amount of water absorbed by the wetted surface of paper and board materials.

Detailed explanation-3: -Porosity is the percentage of void space in a rock. It is defined as the ratio of the volume of the voids or pore space divided by the total volume. It is written as either a decimal fraction between 0 and 1 or as a percentage. For most rocks, porosity varies from less than 1% to 40%.

Detailed explanation-4: -Porosity (usually denoted by the symbol , which is Greek letter ‘eta’) is the primary aquifer property that controls water storage, and is defined as the volume of void space (i.e., that can hold water in the zone of saturation) as a proportion of the total volume (Figure 10).

Detailed explanation-5: -Porosity is the volumetric fraction of pores in the material. These pores can be located on its surface or in its internal structure. Porosity is associated with the density of the material, and with the nature of its compounds and the existence of empty spaces between them.