HS, HT, QT, ST, VG, VT: The name of the BC in the BC Database (see Section 3.17.1). HS was incorporated in Build 2003 05 AC.
CD, CN, HX, QC, SX, VC: Not used.
Char(100)
N/A
f
HT, QT, ST, VG, VT:Multiplication factor applied to the boundary values. If using GIS input, f is assigned a value of one (1) (which has no effect) if it’s absolute value is less than 0.0001. The values may also be factored using the ValueMult keyword (see Table 4 .21). For fixed field input, a value of one (1) is applied if the field is left blank.
HS: Multiplication factor applied to the amplitude. A value of one (1) is applied if the field is left blank.
CN: When used in conjunction (snapped) with a 2D HX object, sets the proportion or weighting to be applied in distributing the water level from the 1D node to the 2D cell where the CN object snaps to the 2D HX object. One or two 1D nodes can be connected to the same point on a 2D HX object. Checks are made that the sum of all CN f values connected to a 2D HX point or 2D HX line/polyline node equals one (1). If only one 1D node is connected, set f to one (1).
HX: Sets the minimum number of connected cells parallel to the grid axes for blocking the cell ends (ZU or ZV points set to 100,003) at either end of the connected cells. For Builds prior to 2002-05-AA, it improves stability where the flow is strongly parallel to the line as is often the case where the HX line is defining a connection to 1D channel(s) flowing through a 2D area. Must be greater than one (1) to activate this feature. (Incorporated in Build 2001-09-AP). Note: As of Build 2002-05-AA, this feature is no longer recommended due to improvements in upstream controlled weir flow along HX boundaries, and should be considered redundant.
CD: The code value to be assigned to cells falling on or within the object.
SX: n offset for determining cell invert levels for distributing flows.
