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TABS-MDS
DF CARD
TURBULENT DIFFUSION COEFFICIENTS IN THE
DF CARD
HORIZONTAL
Required for transport
Field
Variable
Value
Description
0,C1-2
IC1
DF
Card group identifier
C3
b/
Option 1: Global assignment to all material types, starting with
IMAT=J
T
Option 2: Explicit assignment for IMAT J
1
J
+
Starting value or explicit material type (IMAT)
2
ORT(J,8)
+
Turbulent diffusion coefficient associated with the instantaneous
direction of flow. The units of this factor are ft2/sec or m2/sec, as
indicated on the SI-card.
-
Negative value, results in the magnitude of this entry to be treated as a
scale factor applied to a notional element length in the X-direction.
Units for the factor is ft/sec or m/sec, as indicated on the SI-card.
3
ORT(J,9)
+
Baseline turbulent diffusion coefficient. It is applied in all directions.
The units of this factor are ft2/sec or m2/sec, as indicated on the SI-
card.
-
Negative value, results in the magnitude of this entry to be treated as a
scale factor applied to a notional element length in the Y-direction.
Units for the factor is ft2/sec or m2/sec, as indicated on the SI-card.
4
ORT(J,11)
-,0,+
Chezy coefficient for the shoreline.
<1 Manning's N coefficient is used.
= 0 Do not use.
12
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