epikarst zone

epikarst zone:    ; epikarst zone

   A relatively thick (the thickness may vary significantly, but 15 to 30 meters thick is a good generalization) portion of bedrock that extends from the base of the soil zone and is characterized by extreme fracturing and enhanced solution. It is separated from the phreatic zone by an inactive, relatively waterless interval of bedrock that is locally breached by vadose percolation. Significant water storage and transport are known to occur in this zone.

   Synonym: subcutaneous zone.

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epikarst — ; epikarst zone A relatively thick (the thickness may vary significantly, but 15 to 30 meters thick is a good generalization) portion of bedrock that extends from the base of the soil zone and is characterized by extreme fracturing and… … Lexicon of Cave and Karst Terminology
transition zone — 1. Portion of bedrock in the vadose zone that is between the epikarst zone and the phreatic zone, is relatively waterless and unfractured, but is locally breached by discrete percolation points (vadose shafts.) 2. The zone in which the… … Lexicon of Cave and Karst Terminology
subcutaneous zone — Synonym for epikarst zone. See epikarst zone … Lexicon of Cave and Karst Terminology
subcutaneous drain — Discrete percolation drains contained within the epikarst zone and leading to the transitions zone. See also epikarst zone; subcutaneous flow; subcutaneous zone; transition zone … Lexicon of Cave and Karst Terminology
subcutaneous flow — Lateral and vertical flow that occurs within the epikarst zone under saturated conditions. Lateral flow distances can exceed hundreds of meters and several meters per day while vertical within discrete percolation drains (subcutaneous drains)… … Lexicon of Cave and Karst Terminology
aquifere epikarstique — See epikarst zone … Lexicon of Cave and Karst Terminology

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