Revised hydrogeologic framework of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina

Williams, Lester J.; Kuniansky, Eve L.

doi:10.3133/pp1807

Cited by 66 publications

(114 citation statements)

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“…The hydrogeologic framework of the Floridan aquifer system was described by Miller (1986), Arthur andothers (2008), HydroGeoLogic (2013), and Williams and Kuniansky (2015). The hydrology of lakes in the Tsala Apopka Lake area has been described by Rutledge (1977) and Bradner (1988).…”

Section: Climatic Physiographic Geologic and Hydrogeologic Settingmentioning

confidence: 99%

“…SYSTEM HYDROGEOLOGIC UNIT (Miller, 1986) Figure 11. Relation of stratigraphic and hydrogeologic units in the Tsala Apopka Lake study area (modified from Miller, 1986, andKuniansky, 2015). Figure 13.…”

Section: Geologymentioning

confidence: 99%

“…11) in the study area are described by Williams and Kuniansky (2015) and include in descending order, the surficial aquifer, upper confining unit, and Floridan aquifer system. The Floridan aquifer system is further divided into the Upper Floridan aquifer, middle Avon Park confining unit, and the Lower Floridan aquifer, which is not shown on figure 11.…”

Section: Hydrogeologymentioning

confidence: 99%

“…The Floridan aquifer system is further divided into the Upper Floridan aquifer, middle Avon Park confining unit, and the Lower Floridan aquifer, which is not shown on figure 11. To align with SWFWMD studies for this region, the hydrogeologic nomenclature outlined in Miller (1986) is used henceforth instead of the conventions set forth by Williams and Kuniansky (2015). The upper confining unit and middle Avon Park confining unit are the only units affected by this change in convention ( fig.…”

Section: Hydrogeologymentioning

confidence: 99%

“…Hydrogeologic units in the study area include a surficial aquifer consisting of Quaternary-age sediments, a discontinuous intermediate confining unit consisting of Miocene-age and Pliocene-age sediments, and the underlying Upper Floridan aquifer (Miller, 1986;Williams and Kuniansky, 2015). The Upper Floridan aquifer and underlying Lower Floridan aquifer together constitute the Floridan aquifer system.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Groundwater levels, geochemistry, and water budget of the Tsala Apopka Lake system, west-central Florida, 2004–12

McBride¹,

Metz²,

Ryan³

et al. 2017

Scientific Investigations Report

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Section: Climatic Physiographic Geologic and Hydrogeologic Settingmentioning

confidence: 99%

Section: Geologymentioning

confidence: 99%

Section: Hydrogeologymentioning

confidence: 99%

Section: Hydrogeologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Groundwater levels, geochemistry, and water budget of the Tsala Apopka Lake system, west-central Florida, 2004–12

McBride¹,

Metz²,

Ryan³

et al. 2017

Scientific Investigations Report

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Development of a discrete‐continuum VDFST‐CFP numerical model for simulating seawater intrusion to a coastal karst aquifer with a conduit system

2017

Water Resources Research

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A hybrid discrete‐continuum numerical model, Variable‐Density Flow and Solute Transport—Conduit Flow Process (VDFST‐CFP), is developed to simulate seawater intrusion to a coastal karst aquifer with a conduit network. The Darcy‐Weisbach equation is applied to simulate the nonlaminar groundwater flow in the conduit system that is conceptualized as pipes, while the Darcy equation is used for laminar groundwater flow in the continuum porous medium. Density‐dependent groundwater flow with appropriate additional density terms in the conduit is analytically derived. The flow and transport equations are coupled, and numerically solved by the finite difference method with an implicit iteration procedure. Two synthetic benchmarks are developed to compare the VDFST‐CFP model results with other numerical models, such as the variable‐density SEAWAT, constant‐density continuum MODFLOW/MT3DMS, and constant‐density discrete‐continuum CFPv2/UMT3D models. The VDFST‐CFP model compares reasonably well with the other model results in both conduit and porous medium domains, and well describes water and salt exchange between the two systems. Under turbulent flow conditions within the conduit, the Darcy‐Weisbach equation calculates the flow rate more accurately without overestimation by the Darcy equation. Sensitivity analysis indicates that conduit diameter, friction factor, matrix hydraulic conductivity, and effective medium porosity are important parameters in the VDFST‐CFP model. The pros and cons of the VDFST‐CFP model are discussed, including the model assumptions and simplifications, limitations of the discrete‐continuum modeling method, and the convergence criteria. In general, the newly developed VDFST‐CFP model provides a new numerical modeling method for simulating seawater intrusion in a coastal karst aquifer with conduits.

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The Magnitude and Origin of Groundwater Discharge to Eastern U.S. and Gulf of Mexico Coastal Waters

Befus

Kroeger

Smith

et al. 2017

Geophysical Research Letters

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Fresh groundwater discharge to coastal environments contributes to the physical and chemical conditions of coastal waters, but the role of coastal groundwater at regional to continental scales remains poorly defined due to diverse hydrologic conditions and the difficulty of tracking coastal groundwater flow paths through heterogeneous subsurface materials. We use three‐dimensional groundwater flow models for the first time to calculate the magnitude and source areas of groundwater discharge from unconfined aquifers to coastal waterbodies along the entire eastern U.S. We find that 27.1 km3/yr (22.8–30.5 km3/yr) of groundwater directly enters eastern U.S. and Gulf of Mexico coastal waters. The contributing recharge areas comprised ~175,000 km2 of U.S. land area, extending several kilometers inland. This result provides new information on the land area that can supply natural and anthropogenic constituents to coastal waters via groundwater discharge, thereby defining the subterranean domain potentially affecting coastal chemical budgets and ecosystem processes.

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Revised hydrogeologic framework of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina

Cited by 66 publications

References 0 publications

Groundwater levels, geochemistry, and water budget of the Tsala Apopka Lake system, west-central Florida, 2004–12

Groundwater levels, geochemistry, and water budget of the Tsala Apopka Lake system, west-central Florida, 2004–12

Development of a discrete‐continuum VDFST‐CFP numerical model for simulating seawater intrusion to a coastal karst aquifer with a conduit system

The Magnitude and Origin of Groundwater Discharge to Eastern U.S. and Gulf of Mexico Coastal Waters

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