SMS:ADCIRC Boundary Conditions

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Much of ADCIRC's versatility as a model is due to the large number of different boundary types and boundary conditions available in the model.

ADCIRC Boundary Types

Boundary types are assigned to feature arcs in the conceptual mode or nodestrings on the ADCIRC mesh. Correct boundary type assignments are very important to run a successful ADCIRC project. The following boundary types are available in SMS for ADCIRC:

  • Unassigned – default, no boundary condition assigned
  • Mainland – land or coastline boundary
  • Island – this can be selected for a closed feature arc
  • Normal Flow – assigned across the nodes of the mesh, therefore the parameters of this boundary type can only be modified after a mesh has been created and the mesh module is currently selected
  • Normal Wave Radiation
  • Mainland Barrier
  • Island Barrier – requires two nodestrings
  • Weir – requires two nodestrings with the same number of nodes
  • Zero Normal Velocity Gradient
  • Ocean

ADCIRC Boundary Conditions

Depending upon the specified boundary type, the following boundary conditions are available:

Boundary Condition Boundary Type
Essential w/
Tangential Slip
Normal Flow
Mainland Barrier
Essential w/o
Tangential Slip
Normal Flow
Mainland Barrier
Natural (w/
Tangential Slip)
Normal Flow
Mainland Barrier
Tidal Constituents Ocean
Curve Ocean
Extract from Dataset Ocean

Nodal Boundary Conditions (Recording Stations)

The following boundary conditions can be assigned to an ADCIRC mesh node:

2D Station Types

  • Elevation
  • Velocity
  • Concentration
  • Meteorological

3D Staion Types

  • Density/Temperature/Salinity
  • Velocity
  • Turbulence

Description of Station

Stations can be assigned a name to make station identification easier.

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