Simulation of integrated surface-water/ground-water flow and salinity for a coastal wetland and adjacent estuary

Langevin, Christian D.; Swain, Eric D.; Wolfert, Melinda A.

doi:10.1016/j.jhydrol.2005.04.015

Cited by 89 publications

(25 citation statements)

References 29 publications

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“…Significant fluid density gradients can substantially affect the groundwater flow patterns introducing thereby mathematical and numerical complexities for simulating such density-dependent flow systems [1]. Examples of such variable-density environments are: saltwater intrusion [1][2][3][4][5][6][7], Submarine Groundwater Discharge (SGD) [8,9], aquifer storage and recovery [10][11][12][13], brine migration [14], coastal wetland hydrology [15], injection of liquid waste in deep saline aquifers [16], and disposal of radioactive waste in salt formations [17,18]. Numerical modeling of variable-density groundwater flow and transport environments such as in saline environments, where the physics of flow and transport are densitydriven, typically relies on the use of variable-density numerical models that incorporate the relationship between fluid density and solute concentration by iteratively solving the flow and transport governing equations.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Seepage Simulation in a Saline Environment below an Estuary Using MODFLOW and SEAWAT

Al-Taliby¹,

Ashok²,

Heck³

2017

Hydrol Current Res

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This paper compares the results produced by MODFLOW, a constant-density model, to results produced by SEAWAT, a variable-density model, to investigate the feasibility of using MODFLOW in a saline environment below an estuary known as the Indian River Lagoon. The comparison was conducted over sixteen numerical simulation cases at different conditions of estuarine salinity C L , hydraulic conductivity anisotropy ratio K r , and water table elevations on the freshwater boundaries in a two-dimensional vertical domain. The use of MODFLOW at the study site under the calibrated K r distribution ranging from 1000-20,000 was found to accurately match the field-measured and SEAWATsimulated results with a remarkable increase in accuracy at higher groundwater elevations. The study determined a critical value of K r of 1000 above which, MODFLOW simulations of the variable-density problem produced results that agreed well with those produced by SEAWAT. However, MODFLOW starts to produce significant errors with K r below the critical value and hence, it should not be used for simulating variable-density environments when K r <1000. The amount of submarine groundwater discharge (SGD) predicted by either model, and also MODFLOW accuracy in predicting the SGD are directly proportional to the head difference between the groundwater divide elevation and the lagoon water surface, but to a lower extent, are inversely proportional to C L .

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Section: Introductionmentioning

confidence: 99%

Comparison of Seepage Simulation in a Saline Environment below an Estuary Using MODFLOW and SEAWAT

Al-Taliby¹,

Ashok²,

Heck³

2017

Hydrol Current Res

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“…When groundwater interactions are of interest, coupled surface-water/groundwater models of the South Florida area have been developed to examine coastal hydrology and related issues. The primary simulator developed for representing hydrodynamic surface-water flow coupled to groundwater in a highly porous aquifer is called Flow and Transport in a Linked Overland/Aquifer Density-Dependent System (FTLOADDS) (Langevin et al 2005). FTLOADDS links the two-dimensional hydrodynamic flow and transport code SWIFT2D (Swain, 2005) with the widely used three-dimensional groundwater flow and transport code SEAWAT (Guo and Langevin, 2002).…”

Section: Introductionmentioning

confidence: 99%

Numerical computation of hurricane effects on historic coastal hydrology in Southern Florida

2015

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Introduction: Numerical models are critical for assessing the effects of sea level rise (SLR), hurricanes, and storm surge on vegetation change in the Everglades National Park. The model must be capable of representing short-timescale hydrodynamics, salinity transport, and groundwater interaction. However, there is also a strong need to adapt these numerical models to hindcast past conditions in order to examine long-term effects on the distribution of vegetation that cannot be determined using only the modern record.

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“…The development of advanced models that couple groundwater with surface-water while representing complex hydrodynamics and salinity transport has culminated in the Flow and Transport in a Linked Overland/Aquifer Density-Dependent System (FTLOADDS) simulator [1]. In FTLOADDS, the two-dimensional hydrodynamic surface-water flow and transport simulator SWIFT2D [2] is combined with the three-dimensional groundwater flow and salinity transport simulator SEAWAT [3].…”

Section: Introductionmentioning

confidence: 99%

Applying Downscaled Global Climate Model Data to a Hydrodynamic Surface-Water and Groundwater Model

Swain¹,

Stefanova²,

Smith³

2014

AJCC

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Simulation of integrated surface-water/ground-water flow and salinity for a coastal wetland and adjacent estuary

Cited by 89 publications

References 29 publications

Comparison of Seepage Simulation in a Saline Environment below an Estuary Using MODFLOW and SEAWAT

Comparison of Seepage Simulation in a Saline Environment below an Estuary Using MODFLOW and SEAWAT

Numerical computation of hurricane effects on historic coastal hydrology in Southern Florida

Applying Downscaled Global Climate Model Data to a Hydrodynamic Surface-Water and Groundwater Model

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