- 1. A general term used to define a ground-water flow system that has defined boundaries and may include permeable materials that are capable of storing or furnishing a significant water supply; the basin includes both the surface area and the permeable materials beneath it .2. The area throughout which ground water drains towards the same point; it can be larger than the accompanying surface water drainage basin if permeable layers extend outside of the topographic divide .See also drainage basin.
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
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