GEOLOGY

Detailed explanation-1: -Specific yield is the measure of storage change in an aquifer.

Detailed explanation-2: -Storativity or the storage coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer. Storativity is a dimensionless quantity, and is always greater than 0.

Detailed explanation-3: -The porosity of the aquifer is the volume of void space to the total volume, typically expressed as a percentage. Effective porosity is the space available for fluid to flow, and is calculated as the volume of interconnected void space to the total volume, typically given as a percentage.

Detailed explanation-4: -The volume of water required to fill the voids is the VI and effective porosity is computed as ne = VI / VT .

Detailed explanation-5: -The porosity of a rock varies because of the size of the grains in the rock and the shape of the grains. Another factor that affects the porosity of a rock is whether or not there is any material in the rock (or cement) to fill in the gaps between pore spaces and hold the grains together.