2 articles
Lost river
A lost river is a surface stream in karst terrain, typically limestone, that disappears completely underground through caves or sink points and reemerges as a sizable spring.
Subterranean river
Subterranean (underground) rivers flow through karst cave conduits dissolved in soluble rock, distinct from aquifers; mapped by dye tracing, modeled with conduit-matrix tools, and tapped for water supply.