DM CARD: Marsh Porosity Parameters
Optional
Card Description: Used to specify information for the Marsh Porosity wetting and
drying option. The marsh porosity method makes a more realistic and gradual
transition when wetting and drying than does the method of Elemental Elimination
(DE card). All nodes on the element must be flagged before the element is
considered dry.
Field
Variable
Value Description
0, C 1-2
IC1
DM
Card group identifier.
0,C3
IC3
b/
Option: 1 Global: Starting with node = J
T
Option: 2 Explicit by material type = J
E
Option 3: Explicit assignment for Element = J
N
Option 4: Explicit assignment for Node = J
1
J
+
Starting or explicit value
≥0
2
AC1 (J)
Offset depth from mean elevation (m)
<0
Default = 3.0
≥0
3
AC2 (J)
Marsh surface depth range (m)
<0
Default = 2.0
≥0
4
AC3(J)
Minimum fractional area for marsh
<0
Default = 0.05
≥0
5
AC4(J)
Override minimum elevation (m)
<0
Default = 0.0
The order in which DM cards
should appear is: DMb (DM
/
DMb (DM blank) card is required, then optionally followed by DMT, DME, or
/
blank), DMT, DME, and
DMN cards (in that order). If a node receives multiple assignments, the last
finally, DMN. If a DMT card,
assignment is processed.
for example, appears after a
The values for AC1 through AC4 are used as an "initial guess" for SED2D.
DME card, the DME card is
potentially overruled by the
If an element becomes completely wet, DM card information for all nodes
DMT card..
comprising that element is ignored until the water depth of the element falls within
the transitional range and begins to dry.
Default values are automatically converted to metric if the SI card indicates System
International units.
See also
Run Control DM Card 87
Users Guide To SED2D-WES
Previous Page
