A karst aquifer is a type of groundwater system that forms in soluble rock, primarily limestone, where the landscape is characterized by sinkholes, caves, and underground rivers. These unique features arise from the dissolution of the rock by slightly acidic water, which enhances permeability and allows for significant water storage and movement. This system plays a crucial role in supplying fresh water to many regions while also being vulnerable to contamination due to its rapid recharge and drainage characteristics.
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