Christian Langevin (Former Employee)
Science and Products
Filter Total Items: 71
Improved method for simulating groundwater inundation using the MODFLOW 6 Lake Transport Package Improved method for simulating groundwater inundation using the MODFLOW 6 Lake Transport Package
Groundwater inundation due to sea level rise can affect island and coastal freshwater resources by exposing water tables to direct, continuous evaporation. Numerical simulations of groundwater inundation effects on coastal and island aquifers have been limited by an inability to simulate solute transport and variable density flow between the aquifer and lakes formed by groundwater...
Authors
Lauren K. Mancewicz, Alex Mayer, Christian D. Langevin, Jason Gulley
Documentation for the MODFLOW 6 Groundwater Transport Model Documentation for the MODFLOW 6 Groundwater Transport Model
This report documents a new Groundwater Transport (GWT) Model for MODFLOW 6. The GWT Model simulates three-dimensional transport of a single chemical species in fowing groundwater based on a generalized control-volume fnite-difference approach. Although each GWT Model is only able to represent a single chemical species, multiple GWT Models may be invoked within a single MODFLOW 6...
Authors
Christian D. Langevin, Alden M. Provost, Sorab Panday, Joseph D. Hughes
The MODFLOW Application Programming Interface for simulationcontrol and software interoperability The MODFLOW Application Programming Interface for simulationcontrol and software interoperability
The MODFLOW API allows other programs to control MODFLOW and interactively change variables without having to modify the source code. The MODFLOW API is based on the Basic Model Interface (BMI), which is a set of conventions that define how to initialize a simulation, update the model state by advancing in time, and finalize the run. For many existing MODFLOW coupling applications, the...
Authors
Joseph D. Hughes, Martijn J. Russcher, Christian D. Langevin, Eric D. Morway, Richard R. McDonald
Use of the MODFLOW 6 water mover package to represent natural and managed hydrologic connections Use of the MODFLOW 6 water mover package to represent natural and managed hydrologic connections
The latest release of MODFLOW 6, the current core version of the MODFLOW groundwater modeling software, debuted a new package dubbed the “mover” (MVR). Using a generalized approach, MVR facilitates the transfer of water among any arbitrary combination of simulated features (i.e., pumping wells, stream, drains, lakes, etc.) within a MODFLOW 6 simulation. Four “rules” controlling the...
Authors
Eric D. Morway, Christian D. Langevin, Joseph D. Hughes
Rebuttal to “The case of the Biscayne Bay and aquifer near Miami, Florida: density-driven flow of seawater or gravitationally driven discharge of deep saline groundwater?” by Weyer (Environ Earth Sci 2018, 77:1–16) Rebuttal to “The case of the Biscayne Bay and aquifer near Miami, Florida: density-driven flow of seawater or gravitationally driven discharge of deep saline groundwater?” by Weyer (Environ Earth Sci 2018, 77:1–16)
A recent paper by Weyer (Environ Earth Sci 2018, 77:1–16) challenges the widely accepted interpretation of groundwater heads and salinities in the coastal Biscayne aquifer near Miami, Florida, USA. Weyer (2018) suggests that the body of saltwater that underlies fresh groundwater just inland of the coast is not a recirculating wedge of seawater, but results instead from upward migration...
Authors
Alden M. Provost, Adrian D. Werner, Vincent E. A. Post, Holly A. Michael, Christian D. Langevin
Documentation for the “XT3D” option in the Node Property Flow (NPF) Package of MODFLOW 6 Documentation for the “XT3D” option in the Node Property Flow (NPF) Package of MODFLOW 6
This report describes the “XT3D” option in the Node Property Flow (NPF) Package of MODFLOW 6. The XT3D option extends the capabilities of MODFLOW by enabling simulation of fully three-dimensional anisotropy on regular or irregular grids in a way that properly takes into account the full, three-dimensional conductivity tensor. It can also improve the accuracy of groundwater-flow...
Authors
Alden M. Provost, Christian D. Langevin, Joseph D. Hughes
Science and Products
Filter Total Items: 71
Improved method for simulating groundwater inundation using the MODFLOW 6 Lake Transport Package Improved method for simulating groundwater inundation using the MODFLOW 6 Lake Transport Package
Groundwater inundation due to sea level rise can affect island and coastal freshwater resources by exposing water tables to direct, continuous evaporation. Numerical simulations of groundwater inundation effects on coastal and island aquifers have been limited by an inability to simulate solute transport and variable density flow between the aquifer and lakes formed by groundwater...
Authors
Lauren K. Mancewicz, Alex Mayer, Christian D. Langevin, Jason Gulley
Documentation for the MODFLOW 6 Groundwater Transport Model Documentation for the MODFLOW 6 Groundwater Transport Model
This report documents a new Groundwater Transport (GWT) Model for MODFLOW 6. The GWT Model simulates three-dimensional transport of a single chemical species in fowing groundwater based on a generalized control-volume fnite-difference approach. Although each GWT Model is only able to represent a single chemical species, multiple GWT Models may be invoked within a single MODFLOW 6...
Authors
Christian D. Langevin, Alden M. Provost, Sorab Panday, Joseph D. Hughes
The MODFLOW Application Programming Interface for simulationcontrol and software interoperability The MODFLOW Application Programming Interface for simulationcontrol and software interoperability
The MODFLOW API allows other programs to control MODFLOW and interactively change variables without having to modify the source code. The MODFLOW API is based on the Basic Model Interface (BMI), which is a set of conventions that define how to initialize a simulation, update the model state by advancing in time, and finalize the run. For many existing MODFLOW coupling applications, the...
Authors
Joseph D. Hughes, Martijn J. Russcher, Christian D. Langevin, Eric D. Morway, Richard R. McDonald
Use of the MODFLOW 6 water mover package to represent natural and managed hydrologic connections Use of the MODFLOW 6 water mover package to represent natural and managed hydrologic connections
The latest release of MODFLOW 6, the current core version of the MODFLOW groundwater modeling software, debuted a new package dubbed the “mover” (MVR). Using a generalized approach, MVR facilitates the transfer of water among any arbitrary combination of simulated features (i.e., pumping wells, stream, drains, lakes, etc.) within a MODFLOW 6 simulation. Four “rules” controlling the...
Authors
Eric D. Morway, Christian D. Langevin, Joseph D. Hughes
Rebuttal to “The case of the Biscayne Bay and aquifer near Miami, Florida: density-driven flow of seawater or gravitationally driven discharge of deep saline groundwater?” by Weyer (Environ Earth Sci 2018, 77:1–16) Rebuttal to “The case of the Biscayne Bay and aquifer near Miami, Florida: density-driven flow of seawater or gravitationally driven discharge of deep saline groundwater?” by Weyer (Environ Earth Sci 2018, 77:1–16)
A recent paper by Weyer (Environ Earth Sci 2018, 77:1–16) challenges the widely accepted interpretation of groundwater heads and salinities in the coastal Biscayne aquifer near Miami, Florida, USA. Weyer (2018) suggests that the body of saltwater that underlies fresh groundwater just inland of the coast is not a recirculating wedge of seawater, but results instead from upward migration...
Authors
Alden M. Provost, Adrian D. Werner, Vincent E. A. Post, Holly A. Michael, Christian D. Langevin
Documentation for the “XT3D” option in the Node Property Flow (NPF) Package of MODFLOW 6 Documentation for the “XT3D” option in the Node Property Flow (NPF) Package of MODFLOW 6
This report describes the “XT3D” option in the Node Property Flow (NPF) Package of MODFLOW 6. The XT3D option extends the capabilities of MODFLOW by enabling simulation of fully three-dimensional anisotropy on regular or irregular grids in a way that properly takes into account the full, three-dimensional conductivity tensor. It can also improve the accuracy of groundwater-flow...
Authors
Alden M. Provost, Christian D. Langevin, Joseph D. Hughes