Assertion: aquifer | /r/CapableOf | separate by confining units
Facets:
value: least locally
type: MANNER
Source sentences:
text: An aquifer system, on the other hand, is defined as "a heterogeneous body of permeable and poorly permeable materials that functions regionally as a water-yielding unit; it consists of two or more aquifers separated at least locally by confining units that impede groundwater movement, but do not affect the overall hydraulic continuity of the system" (Poland and others, 1972).