...
Additional parameters for
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Liquefaction model (Sliq2D) has to be specified
The greyed input fields are fixed on a default value
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Input screen for the additional Sliq2D parameters
Parameters for the advanced check on liquefaction (SLIQ-2D)
Name in English | Name in Dutch | Description | Symbol | Unit | Default + decimals + (range) |
|---|---|---|---|---|---|
Saturation rate | Verzadigings graad | Degree of saturation | Sr | – | 1 Fixed value |
Grid points X | Aantal rasterpunten X | Number of points in the grid in the X direction |
| – | 20 (2-100) |
Grid points Y | Aantal rasterpunten Y | Number of points in the grid in the Y direction |
| – | 20 (2-100) |
Fill holes | Vul gaten | If true, D-FLOW SLIDE considers the stable points surrounded with unstable points as unstable. |
| Boolean | True Fixed value |
Secondly, the user has to specify some additional parameters for breach flow (HMBreach)
3.5 Parameters for the advanced check on breaching (HMBreach)
3.5.1 Initial conditions of upper layer
Name in English | Name in Dutch | Description | Symbol | Unit | Default decimals + (range) |
|---|---|---|---|---|---|
Froude number | Froude getal |
|
| – | 2 Fixed value |
Concentration | Concentratie |
|
| % | 12 Fixed value |
Minimal initialization height | Minimale initiele hoogte |
|
| m | 0.1 (0.1-5.0) |
Maximal initialization height | Maximale initiele hoogte |
|
| m | 2.5 (0.1-5.0) |
Interval | Interval |
|
| m | 0.01 (0.1-1.0) |
3.5.2 Layer discretization
Name in English | Name in Dutch | Description | Symbol | Unit | Default decimals + (range) |
|---|---|---|---|---|---|
Maximum thickness highest layer | Maximale dikte bovenste laag | For the calculation, the soil profile is divided into sub-layers. This is the maximum thickness of the highest layer of the soil profile. |
| m | 0.05 (0.01-1) |
Maximum thickness lowest layer | Maximale dikte onderste lag | For the calculation, the soil profile is divided into sub-layers. This is the maximum thickness of the lowest layer of the soil profile. |
| m | 0.5 (0.01-1)
|
3.5.3 Approval criterion
Name in English | Name in Dutch | Description | Symbol | Unit | Default + decimals + (range) |
|---|---|---|---|---|---|
Ratio sand transport | Verhouding Zandtransport | Ratio between the sand transport at the toe and the sand transport at the top of a sand cluster, indicating if the considered initialization height is sufficient to produce a breach flow slide, characterized by a strongly increasing sand transport rate along the slope. The minimal initialization height for which this is the case is defined as the critical height. | RatioZV | - | 10 (2-100) |
| Allowable critical height | Toelaatbare kritische beginhoogte | If the critical initialization height is higher than the allowable critical height, the slope is safe. If not, it means that the probability that a breach flow slide will occur is high. | hallowable | m | 1.0 |
3.5.4 Physical constants
...
Symbol
...
Description
...
Unit
...
Default +
decimals
+ (range)
...
a_1_n0
...
Constant erosion formula
...
–
...
1.0
Fixed value
...
Aeros
...
Constant erosion formula
...
–
...
0.012
Fixed value
...
Beros
...
Constant in erosion formula
...
–
...
1.3
Fixed value
...
dn
...
Porosity increase during dilatancy.
...
–
...
Fixed value |
...
f0
...
Darcy-Weisbach bed friction coefficient.
...
–
...
0.1
Fixed value
...
fki
...
Ratio of bed to internal friction.
...
–
...
0.333
Fixed value
...
i
...
Hydraulic gradient. Default is 0.
...
–
...
0
Fixed value
...
rk3
...
Constant in entrainment model.
...
–
...
0.0015
Fixed value
...
temp
...
Water temperature. Defines viscosity,
fall velocity and permeability
...
ºC
...
15.0
(0.0-30.0)
...