D-R-A-F-T
HN CARD: Roughness, (Manning's n-Value)
HN and/or RD is required if an HS card is used and MSC = 2 or 4
Card Description: Used to assign a Manning's n roughness value to the entire grid,
or to an individual material type.
Field
Variable
Value Description
0, C 1-2
IC1
HN
Card group identifier.
Option 1: Global assignment to all nodes, starting
0,C3
IC3
b/
with = J
T
Option 2: Explicit assignment for IMAT = J
E
Option 2: Explicit assignment for Element = J
N
Option 2: Explicit assignment for Node = J
1
J
+
Starting or explicit value
≥0
2
XNVALU (J)
Manning's n-value for location J
<0
Default = 0.0
SED2D WES applies Manning's n-values by node. The node will retain the n-
value it receives from the last HN card that affects that node.
102 Run Control HN Card
Users Guide To SED2D-WES
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