Answer
Porosity refers to the amount of empty space or voids in a rock or sediment that can hold water. It is a measure of the volume of open space relative to the total volume of the material. Permeability, on the other hand, describes the ability of a material to allow the flow of fluids (such as water) through interconnected pore spaces. In other words, it is a measure of how easily water can move through a rock or sediment.
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