APFIVE Groundwater Over-Extraction Model
Which of the following is an example of over-extraction of groundwater, modeled by the differential equation $$\frac{dW}{dt} = R - k$$, where water extraction (k) exceeds the natural recharge rate ®?
A
A region that employs controlled irrigation methods to ensure that extraction never exceeds recharge.
B
A region where groundwater extraction is balanced by equal natural recharge or artificial replenishment.
C
A region where groundwater withdrawal consistently surpasses the natural recharge rate, causing a steady decline in water levels.
D
An area with minimal irrigation demands, maintaining sustainable water table levels.
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