The Blanco River is a karst stream that traverses the Texas Hill Country and Balcones Fault Zone regions associated with the eastern Edwards Plateau.
2] drainage basin crosses two different regions of the Edwards Plateau (or the Edwards-Trinity Aquifer), the Texas Hill Country and the Balcones Fault Zone (Barker & Ardis 1996).
The Balcones Fault Zone Edwards Aquifer supplies water to large human populations; in 1975 it was designated the first sole-source aquifer in Texas for the city of San Antonio (Bowles & Arsuffi 1993).
There was a positive correlation between discharge and specific conductance in four of the streams contributing recharge to the Balcones Fault Zone Edwards Aquifer (Groeger & Gustafson 1994).
3]-N, though much less so than the waters from the Balcones Fault Zone Edwards Aquifer emerging at the Comal or San Marcos Springs (Groeger & Gustafson 1994).
In the late Miocene period, faulting along the Balcones fault zone raised the Edwards Plateau in the north and west relative to sea level and enabled the formation of a circulating freshwater aquifer (Ellis 1986).
The streams recharging the Balcones Fault Zone Edwards aquifer are similar in chemistry (Groeger & Gustafson 1994).
Because this fault is typical of thousands of miles of mapped faults in the Edwards and Trinity aquifers in the Balcones Fault Zone
, the interplay of water and layering, faults and fractures in the Canyon Lake Gorge provides a remarkable opportunity to gain new insights into limestone aquifer behavior," said Dr.