SMS:ADH Boundary Condition Assignment
To open this window, at least one node or nodestring must be selected. After a selection is made, select the ADH | Assign BC... menu item or use the right-click menu.
ADH boundary conditions consist of two specification types (Dirichlet and Natural) and three condition types (flow, pressure, and transport). Dirichlet data is applied on the domain to individual nodes or to groups of nodes (defined with nodestrings). Natural data (flux) is applied through edges of the domain defined by nodestrings and includes a friction specification. A node or nodestring can be assigned only one condition option from each of the three condition types (two flow conditions cannot be assigned to a single node).
Boundary Conditions
Flow Condition Options | Specification Type | Information |
---|---|---|
None | --- | No condition specified |
Flow (per unit length) | Natural | Specified by a Flow (per unit length) time series; NB OVL card with a friction card |
Sidewall (no through flow) | Natural | Creates a vertical wall with the specified shear stress; just a friction card |
Subcritical inflow | Dirichlet | Specified by a Velocity time series; DB OVL card |
Supercritical inflow | Dirichlet | Specified by a Depth time series and a Velocity time series; DB OVH card |
Tailwater (outflow) | Natural | Specified by a Water Surface Elevation time series; NB OTW card with a friction card |
Total discharge | Natural | Specified by a Discharge time series; NB DIS card with a friction card |
Pressure Condition Options | Specification Type | Information |
---|---|---|
None | --- | No condition specified |
Lid (depth underneath) | Dirichlet | Specified by a Depth time series; i.e. a structure (ex. culvert, sluice gate, etc.) defined using bed elevation as datum; DB LDH card |
Lid (draft) | Dirichlet | Specified by a Draft time series; i.e. a floating object (ex. boat, dock, etc.) with draft; DB LID card |
Lid (elevation) | Dirichlet | Specified an Elevation time series; i.e. a structure (ex. culvert, sluice gate, etc.) defined using the elevation datum; DB LDE card |
Transport Condition Options | Specification Type | Information |
---|---|---|
None | --- | No condition specified |
Dirichlet | Dirichlet | Specified by a Transport time series; DB TRN card |
Equilibrium | Dirichlet | Specified by initial concentration (in ppm); This condition can only be assigned to sediments and specified in simulations without cohesive sediments; EQ TRN card |
Natural | Natural | Specified a Transport time series; NB TRN card |
Weir Options | Specification Type | Information |
---|---|---|
None | --- | No condition specified |
Weir | Nodestrings are specified as upstream, upstream edge, downstream or downstream edge. See the WER and WRS card |
Natural Flow Condition Friction Options
Friction Options | Information |
---|---|
Manning's n | Specified by a roughness value; FR MNG card |
Equivalent roughness height | Specified by a roughness height (in ft or m); FR ERH card |
Submerged aquatic vegetation | Specified by an undeflected stem height (in ft or m); FR SAV card |
Un-submerged rigid vegetation | Specified by a roughness height (in ft or m), averaged stem diameter (in ft or m), and average stem density (in stems/ft² or stems/m²); FR URV card |
All mesh boundary edges that do not have a boundary condition will be treated as a frictionless sidewall with no through flow.
All boundary conditions listed above can only be assigned to the mesh boundary, expect the pressure conditions which can also be assigned to the mesh interior.
When changing a condition type on any tab, the existing condition information is cleared from the window such that the information must be respecified upon returning to that type.
Dialog Description
The following controls specify the boundary condition to be assigned to the currently selected entities. This window is expandable by dragging the window edges to increase visibility of the spreadsheet data on the Transport tab.
Boundary Condition Type (Tab Control)
This tab control can contain the following three tabs:
Flow
This tab is only available if all of the currently selected nodes or nodestrings are on the mesh boundary.
Boundary type combo box contains the conditions available for flow (listed above) for the selected entities.
Series data curve button selects the time series to be associated with the selected boundary type. The text label above this curve button will change with the boundary type to denote the type of input. Clicking on the curve button will open the Time Series editor (limited to the curve group of the boundary type). A second curve button will appear for boundary types that require two conditions with time series data.
Friction combo box specifies the type of bed shear stress to be applied to the boundary edge and is available only for Natural boundary types. The friction options are:
- Manning's n provides the Manning's n roughness real number edit field limited to a value of 0.0 to 0.3.
- Equivalent roughness height provides the Roughness height positive real number edit field.
- Submerged aquatic vegetation provides the Undeflected stem height positive real number edit field.
- Un-submerged rigid vegetation provides the Roughness height, Average stem diameter and Average stem density positive real number edit fields.
Pressure
This tab is always available.
The Boundary type combo box contains the conditions available for pressure (listed above) for the selected entities.
The Series data curve button selects the time series to be associated with the selected boundary type. The text label above this curve button will change with the boundary type to denote the type of input. Clicking on the curve button will open the Time Series editor (limited to the curve group of the boundary type).
Transport Constituents
This tab is only available if all of the currently selected nodes or nodestrings are on the mesh boundary and constituents have been included in Transport Constituents.
Boundary type combo box contains the conditions available for transport (listed above) for the selected entities.
Spreadsheet contains the following information specific to each transport type:
- None clears the display of any information in the spreadsheet.
- Dirichlet provides each defined constituent (first column) with a Include check box (second column), Specify Series... curve button (third column), and a series name cell (fourth column). To include the constituent in the specification of the transport condition, check the Include control and specify a concentration series by clicking on the Specify Series... button which will open the Time Series editor (limited to the Transport curve group). When a series has been defined, the name will be listed in the series name cell. A series can be selected by multiple constituents. The concentration series button and name cells are only enabled if the constituent is included in the transport source.
- Equilibrium provides each defined sediment (first column) with a Include check box (second column) and a positive real number Initial concentration cell (third column). To include the sediment in the specification of the transport condition, check the Include control and specify a concentration (in parts per million). If the sediment is not to be present at the beginning of the simulation, specify a concentration of zero. The Initial concentration cell is only enabled if the sediment is included in the transport source.
- Natural provides the same as Dirichlet.
Output (untitled group box)
Output calculated flow across this entity check box is available only for nodestrings and correlates to the FLX card.
Related Topics
SMS – Surface-water Modeling System | ||
---|---|---|
Modules: | 1D Grid • Cartesian Grid • Curvilinear Grid • GIS • Map • Mesh • Particle • Quadtree • Raster • Scatter • UGrid | |
General Models: | 3D Structure • FVCOM • Generic • PTM | |
Coastal Models: | ADCIRC • BOUSS-2D • CGWAVE • CMS-Flow • CMS-Wave • GenCade • STWAVE • WAM | |
Riverine/Estuarine Models: | AdH • HEC-RAS • HYDRO AS-2D • RMA2 • RMA4 • SRH-2D • TUFLOW • TUFLOW FV | |
Aquaveo • SMS Tutorials • SMS Workflows |