Porosity vs. Permeability
Porosity is the amount of space between soil particles. High porosity lots of space between the soil. Low porosity means low space between the soil particles. Permeability is a materials ability to allow fluids to pass through it. High permeability means that fluids can pass through easily. Low permeability means it cannot pass so easily.
A water table explanation.
The zone of aeration, or the zone of unsaturation, is the area above the water table where there is air between the rocks. The zone of saturation is the area below the water table that contains the ground water. The water table is the area that separates the zone of aeration and the zone of unsaturation. An aquiclude is an impermeable layer of rock underlying or overlaying an aquifer. An aquifer is a permeable layer of rock that can contain or transmit ground water.
Types of aquifers.
Confined Aquifers - A confined aquifer is an aquifer that does not allow its water to flow freely, and is impermeable.
Unconfined Aquifer - An unconfined aquifer is an aquifer that allows its water to flow freely, and is permeable.
Depletion of groundwater
Depletion of groundwater could cause dangerous effects. for instance, California would have less water for its population, and it could cause mini earthquakes and chaos.
We pollute groundwater in a few ways.
1 - Ground water can be polluted by runoff from factories and farms