SMS:SRH Boundary Conditions

The SRH Nodestring BC dialog showing a the Inlet-Q option.

SRH support a variety of boundary conditions for hydraulic computation. The boundary conditions for the model are specified through the SRH coverage by selection the an arc and assigning a boundary condition or by selecting a nodestring in the mesh and assigning a boundary condition. All currently supported boundary types are exterior boundaries with the exception of a monitor line. Other boundary types include the following: Inlet-Q, Inlet-SC, Exit-EX, Exit-H, Exit-Q, Wall, and Symmetry.

• Inlet-Q is a subcritical inlet boundary that may be given as a constant discharge or as a variable discharge hydrograph. The velocity distribution type may be selected from the boundary condition menu.
• Inlet-SC is a supercritical inlet boundary that may be given as a constant discharge or as a variable discharge hydrograph. Inlet-SC also requires information about depth. Within the boundary condition menu, the velocity distribution type may be specified.
• Exit-EX is a supercritical exit boundary condition.
• Exit-H is a stage type exit boundary where water surface elevation may be given as a constant number or as a stage-discharge or rating curve.
• Exit-Q is and exit boundary with a discharge given as a constant number or as a hydrograph.

Related Topics

• SRH-2D