By: Omar Perez
What is groundwater?
Porosity vs permeability
Two separate characteristics of rocks control how effective they are as aquifers:
porosity is a measure of how much of a rock is open space. This space can be between grains or within cracks or cavities of the rock. Permeability is a measure of the ease with which a fluid (water in this case) can move through a porous rock.
What are the water table words mean?
- Zone of aeriation- The presence of water and oxygen gives rise to the formation of soil moisture, which influences the rate of corrosion when it comes into contact with metallic objects buried in the ground.
- Zone of saturation- Ground below the water table.
- Water table- The planar, underground surface beneath which earth materials, as soil or rock, are saturated with water.
- Aquiclude- Geological formation that absorbs and holds water but does not transmit it at a sufficient rate to supply springs, and wells.
- Aquifer- Aquifers may occur at various depths. Those closer to the surface are not only more likely to be used for water supply and irrigation, but are also more likely to be topped up by the local rainfall.
types of aquifers
- Unconfined aquifer
- Confined aquifer
- confining unit