Boundary Condition Codes

Boundary condition codes (when boundary conditions are displayed) or values of selected variables (when initial conditions or domain properties are displayed) are shown for the node closest to the cursor when this command from the Edit Bar is selected.

Boundary condition codes are displayed when this command from the Edit Bar is selected (when boundary conditions are displayed).

Boundary code	Boundary Condition
Water Flow:
+1	Constant Head
-1	Constant Flux
-2	Nonactive Seepage Face
+2	Active Seepage Face
-3 (-7, -8, -9)	Time-variable Water Flux
+3 (+7, +8, +9)	Time-variable Pressure Head
-4	Atmospheric
-5	Drain
-6	Free Drainage or Deep Drainage
-9	Gradient BC (when this BC is selected then it is superposed over the Time- Variable Flux 4 BC)
Solute Transport:
-iPointer	Cauchy Boundary Condition. Pointer points to the vector of Boundary Condition values in the Solute Reaction Parameters window (e.g., cBnd1) for solute transport and the Heat Transport Parameters window (e.g., TBound1) for heat transport.
+iPointer	Dirichlet Boundary Condition, Pointer points to the vector of Boundary Condition values in the Solute Reaction Parameters window (e.g., cBnd1) for solute transport and the Heat Transport Parameters window (e.g., TBound1) for heat transport.
-7	Volatile BC (Solute Transport)

Note that Free Drainage and Deep Drainage boundary conditions can not be specified simultaneously in one project. Similarly, when the Gradient Boundary Condition is selected, the Time-Variable Flux 4 BC can not be applied in the same project.

See also Water Flow Conditions, Boundary Condition Options, Special Boundary Conditions, and Triggered Irrigation for additional information on boundary conditions.