Discussion
Well interference occurs when
Answer: A
Correct answer: cones of depression of adjacent wells overlap
Where two wells are close enough for their cones to overlap, each adds to the drawdown at the other, so both must be pumped against a lower water level and each yields less than it would alone. The effect sets a minimum spacing for a wellfield, and where it is ignored the field’s total yield falls well short of the sum of the individual well yields.
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