Abstract
The Floridan aquifer consists of a high presence of karst features that make the landscape prone to sinkholes. Karst conduits can conduct high amounts of water and affect processes such as groundwater transport. A karst conduit evolution model based on dissolution chemistry is applied to the Silver Springs springshed in Ocala, Florida. The model is able to reproduce the observed potentiometric head profiles more accurately than the one-dimensional groundwater flow model for confined aquifer with leaky conditions. In addition, based on the initial fracture geometry and dissolution chemistry, the model predicts the age of the conduits from the analyzed head profiles to be approximately 9–60 Myrs old. The understanding of the karst conduit geometric evolution and mapping can improve conduit age prediction as well as better characterize conduit flow patterns and subsequent groundwater processes.
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