Key Words: GEOLOGY UNIT 4.1

Groundwater - Water retained in pore spaces of rocks below the water table

Porosity - The volume of pore space

% Porosity = total volume of pore space x  100

                   total volume of rock/sediment

Permeability - Rate at which a fluid flows through a rock

Permeability = distance water travelled / time take

Water table - The surface seperating unsaturated rock above from saturated rock below

Hydrostatic pressure - The pressure at a point in a body of water due to the weight of the overlying column of water

Hydraulic gradient = The difference in hydrostatic pressure between two points / Distance between the points

Aquifer - A body of porous and permeable rock capable of storing and yielding significant amounts of water

Recharge zone - Area of an aquifer open…