Service Description: Critical Karst Zone - Critical karst zones are those areas in known soluble rock types with high density of significant cave systems and/or bedrock fractures that lead to the rapid recharge of karst groundwater aquifers from surface runoff. These areas provide critical drinking water supplies for major communities, ranching operations, and springs that support rivers and vital riparian habitat.
High Karst Occurrence Zone - High karst occurrence zones are in known soluble rock types and contain a high frequency of significant caves and karst features such as sinkholes, bedrock fractures that provide rapid recharge of karst aquifers, and springs that provide riparian habitat.
Medium Karst Occurrence Zone – Medium karst occurrence zones are in known soluble rock types but may have a shallow insoluble overburden. These areas may contain isolates karst features such as caves and sinkholes. Groundwater recharge may not be wholly dependent on karst features but the karst features still provide the most rapid aquifer recharge in response to surface runoff.
Low Karst Occurrence Zone – Low karst occurrence zones may be in areas of insoluble rock types or in areas that have soluble rock types at depth with occasional karst features such as shallow surface depressions with few known caves.
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