A 1989 map from the U.S. Geological Survey Water-Resources Investigations Report 90-4108 shows the approximate eastern boundary of the Gray Limestone Aquifer in Miami-Dade County, Florida. This aquifer is a significant, though less permeable, water-bearing unit within the Tamiami Formation, identified at depths of 70 to 160 feet. The data originates from a USGS study addressing increased water demand and management needs in southeastern Florida.
Use Cases
- Delineate the eastern boundary of the Gray Limestone Aquifer for groundwater flow modeling.
- Analyze the aquifer's spatial relationship to the more permeable Biscayne aquifer using the mapped limit.
- Assess potential water supply sources in western Dade County based on the aquifer's defined extent and properties like hydraulic conductivity.
- Integrate the aquifer limit with other geologic data to study the surficial aquifer system's structure.
Strengths
- Data is derived from a formal U.S. Geological Survey investigation (WRIR 90 4108).
- Provides a specific mapped feature (eastern limit) for a defined hydrogeologic unit.
- Includes detailed geologic context on aquifer composition, depth (70-160 ft), and permeability (hydraulic conductivity ~100 ft/d).
Limitations
- Temporal staleness: data reflects the 1989 understanding of the aquifer system.
- Spatial coverage is limited to the approximate eastern limit within Miami-Dade County.
- Lacks underlying tabular data or column details for quantitative analysis.
Provenance
- Source
- U.S. Geological Survey Water-Resources Investigations Report 90-4108, figure 14.
- Collection Method
- Hydrogeologic study involving drilling and monitoring, as referenced in the description.
- Time Range
- Study context from 1989; aquifer identification based on work from 1988.
- Freshness
- null
- Geography
- Miami-Dade County, Florida, USA, with references to Broward, Palm Beach, Collier, and Hendry Counties.