Assertion: aquifer | /r/HasProperty | pumped for extended length of time
Facets:
value: heavily
type: DEGREE
Source sentences:
text: If the aquifer is pumped heavily for an extended length of time, and the water level declines to 150 feet above the top of the aquifer, the aquifer has lost 150 feet of artesian head, but is still fully saturated, and still has its original transmissivity (figure 15).