Assertion: aquifer | /r/HasProperty | near the surface
Facets:
Source sentences:
text: All these factors affect the porosity and permeability of sandy aquifers.:413 Sandy deposits formed in shallow marine environments and in windblown sand dune environments have moderate to high permeability while sandy deposits formed in river environments have low to moderate permeability.:418 Rainfall and snowmelt enter the groundwater where the aquifer is near the surface.
text: Production: Yields 50 to 100 gallons per minutes to wells where aquifer is near the surface and fractures are abundant.
text: Best quality in north-central Iowa where the aquifer is near the surface.