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Darcy's law states that the flow through a porous medium is proportional to the

  • A.hydraulic gradient divided by the area
  • B.hydraulic gradient and the area
  • C.square of the hydraulic gradient
  • D.square root of the hydraulic gradient

Answer: B

The constant of proportionality is the hydraulic conductivity, which lumps the properties of both the medium and the fluid. The linear relation holds only for laminar flow, so very coarse gravel and open fractures depart from it.

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