Geologic Structure of the Surficial Aquifer System Underlying Everglades National Park and the Big Cypress National Preserve

摘要

Well logs from 67 existing deep wells in southern Florida were used to determine the stratigraphy, depth, and extent of the Surficial Aquifer System underlying Everglades National Park and the Big Cypress National Preserve, Florida. Four geologic cross sections were prepared along well transects within the park and preserve to profile the aquifer system. The profiles reveal considerable heterogeneity in the lithologies but suggest two distinct zones. The permeable upper zone and the more permeable beds of the lower zone were considered to be hydrologically connected; thus, the two zones were treated as comprising a Surficial Aquifer System. Presence of a regionally continuous 'green clay bed' of the lower Tamiami Formation was verified, and it was considered the base of the aquifer system. Depth to this bed was determined for the 67 wells, and a contour map of depth to the base of the Surficial Aquifer System was constructed for Dade, Collier, and northern Monroe counties.