SIBERIA parameter
number |
SIBERIA parameter
name |
Dialog Descriptor |
Explanation |
13 |
ModeCh |
Mode for channel model |
Channel geometry model selected
- ModeCh=0: default model, geometry of the channel not calculated
- ModeCh=1: depth calculated as a function of area
|
Channel Initiation Function:

|
27 |
1/at |
CIF threshold |
- The threshold which if exceeded means a hillslope becomes a channel
|
44 |
b5 |
Coefficent on the channel initiation function (CIF)
relationship |
- This is the coefficient of the process that triggers channel
formation. e.g. if the process considered is shear stress then this is
a function of mannings n.
|
47 |
m5 |
Exponent on the discharge in the CIF relationship |
- This is the exponent on discharge in the process that triggers
channel/gully formation. e.g. if this process is bottom shear stress then
a value of 0.3 is appropriate.
|
45 |
n5 |
Exponent on the slope in the CIF relationship |
- This is the exponent on slope in the process that triggers channel/gully
formation. e.g. if this process is bottom shear stress then a value of
0.4 is appropriate.
|
36 |
a1 |
Discharge factor between fluvial transport and CIF |
- This factor multiplies the discharge used in the sediment transport
equation to yield the discharge used in the channel model
- Unless there is a strong case otherwise this parameter is generally
a1=1
|
52 |
dtime |
Rate of channel formation |
- This parameter determines the rate at which a channel is formed
once the CIF threshold is exceeded. A large value gives fast forming channels/gullies,
while a low value yields slow forming channels/gullies
|
Channel Geometry Model:
This model is only active if ModeCh=1

|
57 |
b6 |
Coefficent on the channel geometry model |
- If this parameter is larger then gullies are deeper for a given
catchment area.
|
58 |
m6 |
Exponent on area in the channel geometry model |
- If this parameter is larger then the gullies get deeper more
quickly as you proceed downstream.
|