Storativity is a dimensionless quantity , and ranges between 0 and the effective porosity of the aquifer .
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 .
volume is a dimensionless volume , and ranges between 0 and the effective porosity of the aquifer .
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 .