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Specific capacity of a well is its yield per unit of

  • A.casing diameter
  • B.drawdown
  • C.aquifer thickness
  • D.time pumped

Answer: B

Correct answer: drawdown

Specific capacity is

\[ \frac{Q}{s} \]

the discharge per unit of drawdown, in litres per minute per metre or an equivalent unit. It measures the performance of the well and aquifer together, and because it is easy to measure it is the standard indicator of how a well is behaving over its life.

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