When a sand is made up of round, evenly sized grains, as in aquifer "A" below, the aquifer stores more water than one consisting of a mixture of grains as in Aquifer "B".
When the grains are larger, the openings between the grains are larger, and the aquifer has a high permeability. When small grains get mixed up between the large grains, the spaces are clogged up, and the aquifer has less permeability
Water moving through the aquifer may not disturb the large grains, but it is likely to dislodge the small grains and carry them along with the flow.
When the grains are larger, the openings between the grains are larger, and the aquifer has a high permeability. When small grains get mixed up between the large grains, the spaces are clogged up, and the aquifer has less permeability
Water moving through the aquifer may not disturb the large grains, but it is likely to dislodge the small grains and carry them along with the flow.
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