Calculation of PVD's 2 - Equivalent PVD diameter

  • calculation assumes PVD cylindrical and draining effect dependent on periphery
  • PVD effective periphery is 2 x width x f, where f is a correction factor allowing for:
    less favorable inflow to possible disturbance & smear effect to soil during installation

d = equivalent diameter of PVD
b = width of PVD

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