International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage



(2545) Horizontal drainage blanket, Pervious blanket, or Drainage filter
A blanket of pervious material provided at the foundation level, commencing from the impervious zone to the downstream of an earthdam or the landside of a levee to allow the seepage water to travel and minimize the possibility of failure by piping or a blow out or sub-surface erosion.

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