Karst aquifers are those in which caves or conduits form an important part of the flow path. Conduit permeability ranges from pipe-like openings greater than one centimeter in aperture to caves many meters in aperture. Recharge to karst aquifers comes from sinking streams, from dispersed infiltration through the epikarst, to storm runoff and into sinkholes. Discharge from karst aquifers is through large springs. Spring discharge tends to respond rapidly to storm flow. Groundwater moves through conduits in turbulent flow and typically carries a sediment load during storm runoff.