Boundary Conditions provide water quality constituent concentrations for inflows. A time series (boundary condition) must be specified for each modeled water quality (WQ) constituent at all locations where flow enters the system, including upstream boundaries of the main channel and its tributaries and lateral inflows. The Boundary Condition Set Editor (Figure 8.1) enables the user to create one or more boundary conditions datasets. However, a Geometry dataset (Chapter 4) and at least one WQ Constituent Set (Chapter 5) must be created and completed before a user can create a boundary conditions set. These two prerequisite datasets are the Geometry (Chapter 4) and at least one WQ Constituent Set (Chapter 5). When a boundary conditions dataset is created, the identified geometry and water quality constituent set provides the set of boundary inflow location(s) and WQ constituents for the user to define. The user must then specify the time series (or constant value) for each WQ constituent at each boundary location. The user can then plot and tabulate the observed data by Location or Constituent. Figure 8.1 – Boundary Condition Set Editor – View Selection Tree by Location – View Location Data by Stacked Plot The prerequisites for completing the Boundary Condition Set are a Geometry dataset (Chapter 4) and at least one WQ Constituent Set (Chapter 5). The Boundary Condition Set is not used in any WQ Dataset.
