What is groundwater?
Groundwater is water held underground in the soil or in pores and crevices in rock.
Porosity vs permeability
porosity is a measure of how much of a rock is in a open space. This space can be be between grains or within cracks or cravities of the rock. Permeability is allows the gas or movement to pass through it
Ground surface: The water on the Earth's surface—surface water—occurs as streams, lakes, and wetlands, as well as bays and oceans.
Capillary fringe: The capillary fringe is the subsurface layer in which groundwater seeps up from a water table by capillary action to fill pores.
Aquifers come in two types which are shown below: unconfined and confined. Unconfined aquifers are those into which water seeps from the ground surface directly above the aquifer
- dry well
- salt intrusion
- land starts to sink in