Assertion: aquifer's porosity | /r/HasProperty | the volume of pore space
Facets:
Source sentences:
text: Porosity is the volume of pore space relative to the total volume (rock and/or sediment + pore space).
text: The amount of water a given type of rock can hold depends on the rock's porosity, which is the volume of pore space between the grains of the sediment or fractures in the rock.