Christian Langevin (Former Employee)
Science and Products
Filter Total Items: 71
An autonomous, electromagnetic seepage meter to study coastal groundwater/surface-water exchange An autonomous, electromagnetic seepage meter to study coastal groundwater/surface-water exchange
The bi-directional exchange of groundwater with coastal surface waters may influence not only coastal-water and geochemical budgets, but may also impact and direct coastal ecosystem change. For example, the widespread discharge of nutrient-enriched submarine groundwater into an estuary or lagoon may contribute directly to the onset and duration of eutrophication, as well as the...
Authors
Peter W. Swarzenski, Matt Charette, Christian D. Langevin
Development of coastal flow and transport models in support of everglades restoration Development of coastal flow and transport models in support of everglades restoration
No abstract available.
Authors
Christian D. Langevin, Eric D. Swain, John D. Wang, Melinda A. Wolfert, Raymond W. Schaffranek, Ami L. Riscassi
Simulation of Integrated Surface-Water/Ground-Water Flow and Salinity for a Coastal Wetland and Adjacent Estuary Simulation of Integrated Surface-Water/Ground-Water Flow and Salinity for a Coastal Wetland and Adjacent Estuary
The SWIFT2D surface-water flow and transport code, which solves the St. Venant equations in two dimensions, was coupled with the SEAWAT variable-density ground-water code to represent hydrologic processes in coastal wetlands and adjacent estuaries. The integrated code was applied to the southern Everglades of Florida to quantify flow and salinity patterns and to evaluate effects of...
Authors
Christian D. Langevin, Eric D. Swain, Wolfert Melinda A.
The rotating movement of three immiscible fluids - A benchmark problem The rotating movement of three immiscible fluids - A benchmark problem
A benchmark problem involving the rotating movement of three immiscible fluids is proposed for verifying the density-dependent flow component of groundwater flow codes. The problem consists of a two-dimensional strip in the vertical plane filled with three fluids of different densities separated by interfaces. Initially, the interfaces between the fluids make a 45??angle with the...
Authors
M. Bakker, Essink G.H.P. Oude, C.D. Langevin
Stochastic Ground Water Flow Simulation with a Fracture Zone Continuum Model Stochastic Ground Water Flow Simulation with a Fracture Zone Continuum Model
A method is presented for incorporating the hydraulic effects of vertical fracture zones into two-dimensional cell-based continuum models of ground water flow and particle tracking. High hydraulic conductivity features are used in the model to represent fracture zones. For fracture zones that are not coincident with model rows or columns, an adjustment is required for the hydraulic...
Authors
C.D. Langevin
Simulation of Submarine Ground Water Discharge to a Marine Estuary: Biscayne Bay, Florida Simulation of Submarine Ground Water Discharge to a Marine Estuary: Biscayne Bay, Florida
Variable density ground water flow models are rarely used to estimate submarine ground water discharge because of limitations in computer speed, data availability, and availability of a simulation tool that can minimize numerical dispersion. This paper presents an application of the SEAWAT code, which is a combined version of MODFLOW and MT3D, to estimate rates of submarine ground water...
Authors
C.D. Langevin
Science and Products
Filter Total Items: 71
An autonomous, electromagnetic seepage meter to study coastal groundwater/surface-water exchange An autonomous, electromagnetic seepage meter to study coastal groundwater/surface-water exchange
The bi-directional exchange of groundwater with coastal surface waters may influence not only coastal-water and geochemical budgets, but may also impact and direct coastal ecosystem change. For example, the widespread discharge of nutrient-enriched submarine groundwater into an estuary or lagoon may contribute directly to the onset and duration of eutrophication, as well as the...
Authors
Peter W. Swarzenski, Matt Charette, Christian D. Langevin
Development of coastal flow and transport models in support of everglades restoration Development of coastal flow and transport models in support of everglades restoration
No abstract available.
Authors
Christian D. Langevin, Eric D. Swain, John D. Wang, Melinda A. Wolfert, Raymond W. Schaffranek, Ami L. Riscassi
Simulation of Integrated Surface-Water/Ground-Water Flow and Salinity for a Coastal Wetland and Adjacent Estuary Simulation of Integrated Surface-Water/Ground-Water Flow and Salinity for a Coastal Wetland and Adjacent Estuary
The SWIFT2D surface-water flow and transport code, which solves the St. Venant equations in two dimensions, was coupled with the SEAWAT variable-density ground-water code to represent hydrologic processes in coastal wetlands and adjacent estuaries. The integrated code was applied to the southern Everglades of Florida to quantify flow and salinity patterns and to evaluate effects of...
Authors
Christian D. Langevin, Eric D. Swain, Wolfert Melinda A.
The rotating movement of three immiscible fluids - A benchmark problem The rotating movement of three immiscible fluids - A benchmark problem
A benchmark problem involving the rotating movement of three immiscible fluids is proposed for verifying the density-dependent flow component of groundwater flow codes. The problem consists of a two-dimensional strip in the vertical plane filled with three fluids of different densities separated by interfaces. Initially, the interfaces between the fluids make a 45??angle with the...
Authors
M. Bakker, Essink G.H.P. Oude, C.D. Langevin
Stochastic Ground Water Flow Simulation with a Fracture Zone Continuum Model Stochastic Ground Water Flow Simulation with a Fracture Zone Continuum Model
A method is presented for incorporating the hydraulic effects of vertical fracture zones into two-dimensional cell-based continuum models of ground water flow and particle tracking. High hydraulic conductivity features are used in the model to represent fracture zones. For fracture zones that are not coincident with model rows or columns, an adjustment is required for the hydraulic...
Authors
C.D. Langevin
Simulation of Submarine Ground Water Discharge to a Marine Estuary: Biscayne Bay, Florida Simulation of Submarine Ground Water Discharge to a Marine Estuary: Biscayne Bay, Florida
Variable density ground water flow models are rarely used to estimate submarine ground water discharge because of limitations in computer speed, data availability, and availability of a simulation tool that can minimize numerical dispersion. This paper presents an application of the SEAWAT code, which is a combined version of MODFLOW and MT3D, to estimate rates of submarine ground water...
Authors
C.D. Langevin