Pedernales Falls State Park Spring Dye Trace Project: Determining the Source of the Spring at Pedernales Falls State Park
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The results of this dye trace study confirm that the source of the spring at the base of the falls at Pedernales Falls State Park (PFSP) is mainly a diversion of river water through a swallet or sink upstream of the park originating in the Marble Falls Formation. Continuous monitoring with a field fluorimeter, charcoal samplers and grab samples of water collected at the spring detected fluorescein dye poured near the area of the swallet. Dye breakthrough at the spring indicated a travel time of approximately 15.5 hours over a 2.4 mile distance.