Hydrogeologic characterization of part of the Lower Floridan Aquifer at the South District Wastewater Treatment Plant, Miami-Dade County, Florida

Open-File Report 2019-1034
Prepared in cooperation with the Miami-Dade Water and Sewer Department
By:  and 

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Abstract

The South District Wastewater Treatment Plant in southeastern Miami-Dade County, Florida, includes a Class I treated wastewater injection well system. The detection of ammonia in monitoring zones above the injection zone in the Lower Floridan aquifer has elicited a need to understand the nature of confinement within the Lower Floridan aquifer as it pertains to the vertical migration of injectate out of the injection zone upward into the Underground Source of Drinking Water in the upper part of the Floridan aquifer system. Geologic and geophysical data, borehole video imagery, and aquifer performance data were used to refine and clarify the geologic and hydrogeologic frameworks of part of the Lower Floridan aquifer at the treatment plant. The data provide evidence for zones of enhanced dissolution permeability, extensive secondary porosity, fractures, karst collapse structures, and faults that could provide vertical cross-formational fluid pathways that transect the Lower Floridan aquifer.

Suggested Citation

DeFosset, K.L., and Cunningham, K.J., 2019, Hydrogeologic characterization of part of the Lower Floridan aquifer at the South District Wastewater Treatment Plant, Miami-Dade County, Florida: U.S. Geological Survey Open-File Report 2019–1034, 15 p., https://doi.org/10.3133/ofr20191034.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Methods
  • Geologic Framework
  • Hydrogeologic Framework
  • Aquifer Performance Test Results
  • Summary
  • References Cited

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Hydrogeologic characterization of part of the Lower Floridan aquifer at the South District Wastewater Treatment Plant, Miami-Dade County, Florida
Series title Open-File Report
Series number 2019-1034
DOI 10.3133/ofr20191034
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Caribbean-Florida Water Science Center
Description 24 p.
Country United States
State Florida
County Miami-Dade County
Other Geospatial Lower Floridan Aquifer
Online Only (Y/N) Y