flopy.mf6.modflow.mfgwecnd module

class ModflowGwecnd(model, loading_package=False, xt3d_off=None, xt3d_rhs=None, export_array_ascii=None, export_array_netcdf=None, alh=None, alv=None, ath1=None, ath2=None, atv=None, ktw=None, kts=None, filename=None, pname=None, **kwargs)[source]

Bases: MFPackage

ModflowGwecnd defines a CND package.

Parameters:

  • model – Model that this package is a part of. Package is automatically added to model when it is initialized.

  • loading_package (bool, default False) – Do not set this parameter. It is intended for debugging and internal processing purposes only.

  • xt3d_off (keyword) – deactivate the xt3d method and use the faster and less accurate approximation. this option may provide a fast and accurate solution under some circumstances, such as when flow aligns with the model grid, there is no mechanical dispersion, or when the longitudinal and transverse dispersivities are equal. this option may also be used to assess the computational demand of the xt3d approach by noting the run time differences with and without this option on.

  • xt3d_rhs (keyword) – add xt3d terms to right-hand side, when possible. this option uses less memory, but may require more iterations.

  • export_array_ascii (keyword) – keyword that specifies input griddata arrays should be written to layered ascii output files.

  • export_array_netcdf (keyword) – keyword that specifies input gridded arrays should be written to the model output netcdf file with attributes that support using the generated file as a modflow 6 simulation input. this option only has an effect when an output model netcdf file is configured and the simulation is run in validate mode, otherwise it is ignored.

  • alh ([double precision]) – longitudinal dispersivity in horizontal direction. if flow is strictly horizontal, then this is the longitudinal dispersivity that will be used. if flow is not strictly horizontal or strictly vertical, then the longitudinal dispersivity is a function of both alh and alv. if mechanical dispersion is represented (by specifying any dispersivity values) then this array is required.

  • alv ([double precision]) – longitudinal dispersivity in vertical direction. if flow is strictly vertical, then this is the longitudinal dispsersivity value that will be used. if flow is not strictly horizontal or strictly vertical, then the longitudinal dispersivity is a function of both alh and alv. if this value is not specified and mechanical dispersion is represented, then this array is set equal to alh.

  • ath1 ([double precision]) – transverse dispersivity in horizontal direction. this is the transverse dispersivity value for the second ellipsoid axis. if flow is strictly horizontal and directed in the x direction (along a row for a regular grid), then this value controls spreading in the y direction. if mechanical dispersion is represented (by specifying any dispersivity values) then this array is required.

  • ath2 ([double precision]) – transverse dispersivity in horizontal direction. this is the transverse dispersivity value for the third ellipsoid axis. if flow is strictly horizontal and directed in the x direction (along a row for a regular grid), then this value controls spreading in the z direction. if this value is not specified and mechanical dispersion is represented, then this array is set equal to ath1.

  • atv ([double precision]) – transverse dispersivity when flow is in vertical direction. if flow is strictly vertical and directed in the z direction, then this value controls spreading in the x and y directions. if this value is not specified and mechanical dispersion is represented, then this array is set equal to ath2.

  • ktw ([double precision]) – thermal conductivity of the simulated fluid. note that the cnd package does not account for the tortuosity of the flow paths when solving for the conductive spread of heat. if tortuosity plays an important role in the thermal conductivity calculation, its effect should be reflected in the value specified for ktw.

  • kts ([double precision]) – thermal conductivity of the solid aquifer material

  • filename (str or PathLike, optional) – Name or path of file where this package is stored.

  • pname (str, optional) – Package name.

  • **kwargs – Extra keywords for flopy.mf6.mfpackage.MFPackage.

alh = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
alv = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
ath1 = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
ath2 = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
atv = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
dfn = [['header'], ['block options', 'name xt3d_off', 'type keyword', 'shape', 'reader urword', 'optional true'], ['block options', 'name xt3d_rhs', 'type keyword', 'shape', 'reader urword', 'optional true'], ['block options', 'name export_array_ascii', 'type keyword', 'reader urword', 'optional true', 'mf6internal export_ascii'], ['block options', 'name export_array_netcdf', 'type keyword', 'reader urword', 'optional true', 'mf6internal export_nc', 'extended true'], ['block griddata', 'name alh', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true'], ['block griddata', 'name alv', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true'], ['block griddata', 'name ath1', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true'], ['block griddata', 'name ath2', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true'], ['block griddata', 'name atv', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true'], ['block griddata', 'name ktw', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true'], ['block griddata', 'name kts', 'type double precision', 'shape (nodes)', 'reader readarray', 'layered true', 'netcdf true', 'optional true']]
dfn_file_name = 'gwe-cnd.dfn'
kts = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
ktw = <flopy.mf6.data.mfdatautil.ArrayTemplateGenerator object>
package_abbr = 'gwecnd'