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Yield of a well per unit drawdown is called .............................

  • A.Specific capacity
  • B.Specific retention
  • C.Safe yield
  • D.Specific yield

Answer: A

Yield per unit drawdown is the specific capacity.

Specific capacity is the pumping rate of a well divided by the drawdown it produces, for example litres per minute per metre. It measures how productive a well is.

Specific yield and specific retention are aquifer properties: the fraction of water a rock releases by gravity drainage, and the fraction it holds back. Safe yield is the amount that can be withdrawn from a basin without harmful depletion.

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