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TABS-MDS
DM CARD
WETTING AND DRYING BY MARSH POROSITY
DM CARD
Active parameters on this card cause the program to use the marsh porosity theory. There are instances
when the user may choose to run both wet/dry techniques simultaneously (DE and DM-cards).
Field
Variable
Value
Description
0,C1-2
IC1
DM
Card group identifier
0,C3
IC3
b/
Option 1: global assignment
N
Option 2: assignment by node
E
Option 3: assignment by element
T
Option 4: assignment by material type
1
J
Option 1
0
Turns off marsh porosity. All DM cards are ignored.
-1
Use default values for data fields 2 - 5 for ALL nodes (user specified
values are ignored).
-2
User specifies the values in data fields 2 - 5 for ALL nodes.
User specifies the values in data fields 2 - 5 for all nodes ≥ J.
+
Option 2
+
User specifies the values in data fields 2 - 5 for node J.
Option 3
+
User specifies the values in data fields 2 - 5 for element J.
Option 4
+
User specifies the values in data fields 2 - 5 for material type J.
2
AC1
+
Bed elevation offset (AOabs = AO - AC1)
(default = 3.0 ft or 0.91 m)
If AC4 ≠ 0, AOabs = MIN(AC4,AO - ABS(AC1))
-,0
3
AC2
+
Transition range of the distribution
(default = 2.0 ft or 0.61 m)
4
AC3
+
Minimum wetted surface area factor
(default = 0.02)
5
AC4
+,0
Absolute bed elevation (AOabs = AC4).
Only active if AC4 ≠ 0 (default = 0)
Note: to activate Marsh Porosity, at least one DMb/ card is required. DMT, DME, or DMN cards may be included
as desired.
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