boundaries Section¶

This section configures open boundary conditions (OBCs), relaxation zones, river inputs, and buffer zones for the model.

Parameter	Description
`type`	Type of open boundary condition (`1`=clamped, `2`=Flather, `3`=Orlanski, `7`=delayed Flather, etc.).
`mode`	Mode for boundary conditions (`LOCAL`, `VARIATIONAL`).
`relax_time`	Relaxation time for boundary conditions (default: `2.0 hours`).
`archived_BC_use`	Flag to use archived boundary conditions (`TRUE`, `FALSE`).
`archived_BC_directory`	Directory for archived boundary condition files.
`archived_BC_format`	Format of archived boundary condition files (`BINARY`, `NETCDF`).
`archived_BC_input-settings`	Input settings for archived boundary conditions (e.g., `file=ROOTNAME.YYYY.MM.nc ssh=XXX u=XXX v=XXX mode=UNSTRUCTURED`).
`archived_BC_offset`	Offset for archived boundary condition elevation.
`archived_BC_units`	Units system for archived boundary conditions (`MKS`, `CGS`).
`archived_BC_transport`	Transport variable for boundary conditions (`u`, `U`, `null`).
`CirculationOBCs_Flag`	Flag to enable/disable circulation OBCs (`TRUE`, `FALSE`).
`CirculationOBCs_Directory`	Directory for circulation OBC files.
`CirculationOBCs_Format`	Format of circulation OBC files (`BINARY`, `NETCDF`).
`CirculationOBCs_InputSetting`	Input settings for circulation OBCs.
`CirculationOBCs_Offset`	Offset for circulation OBC elevation.
`CirculationOBCs_Units`	Units system for circulation OBCs (`MKS`, `CGS`).
`CirculationOBCs_Transport`	Transport variable for circulation OBCs (`u`, `U`, `null`).
`PermanentTide_Flag`	Flag to add permanent tide in OBCs and tidal potential (`TRUE`, `FALSE`).
`periodic_conditions_file`	File containing instructions for boundary condition periodicity.
`sponge_flag`	Flag to enable/disable sponge layer (`TRUE`, `FALSE`).
`PML_factor`	Attenuation factor in PML absorbing zone (default: `0.0 s⁻¹`).
`RelaxationFlag`	Flag to activate relaxation in buffer zone (`TRUE`, `FALSE`).
`RelaxationTimeScale`	Relaxation time scale for buffer zone (default: `0.0 decimal days`).
`RelaxationLengthScale`	Relaxation length scale for buffer zone (default: `0.0 m`).
`LinearityFlag`	Flag to activate model linearity in buffer zone (`TRUE`, `FALSE`).
`LinearityLengthScale`	Linearity length scale for radiative buffer zone (default: `0.0 m`).
`BufferZoneFile`	File containing instructions for open boundary buffers.
`rivers_flag`	Flag to enable/disable river discharge (`TRUE`, `FALSE`).
`rivers_file`	File containing river discharge information (default: `rivers.dat`).
`solid_boundary_condition`	Solid boundary condition type (`FREE-SLIP`, `CONDITIONAL-NO-SLIP`).
`no_slip_size`	Size for no-slip condition (default: `100.0 m`).