Assertion: unconfined aquifer | /r/HasAspect | significant vadose zone
Facets:
value: between the land surface
type: LOCATION
value: usually
type: TEMPORAL
Source sentences:
text: Unconfined aquifers are also known as "water table aquifers" because they usually have a significant vadose zone between the land surface (in the upper, unsaturated part of the aquifer) and the water table; the depth of the water table, and thus the thickness of the unsaturated zone, fluctuates seasonally in response to precipitation patterns, groundwater recharge, and water levels in adjacent streams.