This can be expressed as the specific weight g . The Specific weight is the force exerted by gravity on a unit volume of the fluid . Aquifer - a geologic unit that can store and transmit water at rates fast enough to supply reasonable amount to wells. Equivalent to an ore an economic deposit of a mineral. Most rock units near the earth s surface have hydraulic conductivity sufficient to make them aquifers.
Aquifers have porosity and permeability.
Leaky Confining layer - a confining layer that can store and transmit water.