Saltwater intrusion mapping in the Biscayne Aquifer for Miami-Dade County, Florida. The study compiled salinity data, electromagnetic surveys from 35 wells and 79 locations, geochemical samples, and core logs from 2008 to 2011. It was conducted by the CEOS_EXTRA organization using NASA EarthData resources.
Use Cases
- Model saltwater front movement using time-series electromagnetic induction log data from 35 monitoring wells.
- Analyze sources of saltwater influx by correlating salinity data from canals with geochemical sample isotope composition.
- Map the inland extent of saltwater intrusion using helicopter electromagnetic survey data and time-domain electromagnetic soundings from 79 locations.
- Assess changes in intrusion area by comparing 2011 mapped extents against the 1995 baseline across specific regions.
- Monitor canal salinity influence on the aquifer using practical salinity unit (PSU) time-series data from 1988 to 2010.
Strengths
- Integrates multiple data sources: 35 well logs, 79 electromagnetic soundings, 69 geochemical samples, and 8 core sites.
- Provides quantified spatial analysis, reporting approximately 1,200 square kilometers of intruded aquifer and specific area changes.
- Includes long-term salinity monitoring in canals covering a 22-year period from 1988 to 2010.
Limitations
- Primary data collection concluded in 2011, making the core dataset over a decade old.
- The inland extent of saltwater was previously only mapped in 1995, limiting long-term trend analysis.
- Sample sizes for specific components like geochemical samples (69) and new monitoring wells (8) are relatively small.
Provenance
- Source
- CEOS_EXTRA via NASA EarthData (nasa_earthdata).
- Collection Method
- Field study combining historical salinity data, electromagnetic induction logs, time-domain electromagnetic soundings, helicopter surveys, core sampling, and geochemical analysis.
- Time Range
- Study period 2008–2011, with some historical salinity data from 1988–2010 and a prior mapping reference from 1995.
- Freshness
- null
- Geography
- Biscayne Aquifer, Miami-Dade County, Florida, USA.