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Hydrogeochemistry

Evaluating how surface water injection and infiltration into our aquifers affects water chemistry. Research in this area includes water-rock interaction and metals mobilization often found in Aquifer Storage and Recovery (ASR); Florida springs and aquifer system ambient geochemistry data collection and interpretation; and water quality trends analysis. Recent FGS projects in this research area include:

Florida Aquifer Storage and Recovery (ASR) & Aquifer Recharge (AR) Studies

Florida Aquifer Storage and Recovery (ASR) & Aquifer Recharge (AR)

Contact: Cindy Fischler

Aquifer storage and recovery (ASR) of treated potable or reclaimed water into confined or semi-confined permeable formations is becoming a widely accepted technology for addressing water supply issues. Multiple ASR facilities are either under construction or operating in Florida to help meet increasing demands for drinking water, agricultural production and environmental restoration. Additional aquifer recharge (AR) sites are operational throughout the state where withdrawal and saltwater intrusion have increased over the past several years.

Understanding the water quality changes and how arsenic and other metals can be mobilized during ASR will assist in mitigating any potential adverse reactions and render ASR a more useful water management tool for guiding regulatory policy. Over the past 20 years, the Florida Geological Survey has worked with the DEP Underground Injection Control Program (Division of Water Management) to investigate:

  • the chemical (including isotopic) variability existing within ground water and the carbonates of the Floridan Aquifer System
  • the variability that may result in site-specific geochemical processes affecting ASR/AR wells and water quality
  • the capacity for injectable to cause the release of trace metals into the recharged (and eventually recovered) waters
  • the design of recharge-storage-recovery cycle tests and the location of monitor wells as important aspects of understanding these geochemical processes

The most recent study, A review of selected Florida Aquifer Storage and Recovery (ASR) sites and their geochemical characteristics, was completed and published in 2015 as FGS Report of Investigation 112.

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Last Modified:
October 26, 2017 - 6:18pm

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