GEOLOGY

Detailed explanation-1: -For groundwater to be able to get into a rock with good porosity it must also have good permeability. For a rock to be permeable and for water to move through it, the pore spaces between the grains in the rock must be connected. Permeability is therefore a measure of the ability of water to move through a rock.

Detailed explanation-2: -Because they have large and connected spaces, materials such as sand and gravel allow water to pass through, or permeate. They are thus known as permeable materials. As water soaks down through permeable rock and soil, it eventually reaches layers of material that it cannot pass through.

Detailed explanation-3: -Permeability defines how easily a fluid flows through a porous material. Materials with a high permeability allow easy flow, while materials with a low permeability resist flow.

Detailed explanation-4: -Permeability is a measure of the interconnectedness of pores. The connection between pore spaces allows groundwater to flow through the sediment or rock. The combination of water storage (porosity) and flow (permeability) makes a good aquifer-a rock unit or sediment that contains usable groundwater.

Detailed explanation-5: -Permeable rocks can contain one or more unconfined, permeable rock aquifers, where groundwater is stored and transmitted through intergranular pore space, fractures, vesicles and/or weathered zone of the rock.