# SIBERIA: Advanced Parameters

The parameters controlling the internals of SIBERIA. These parameters should never be changed and are only here to allow them to be changed in the unlikely event that future developments in SIBERIA require this change. This section also includes some models for SIBERIA that are either poorly developed, incompletely implemented or tested or research in progress.

SIBERIA parameter number | SIBERIA parameter name | Dialog Descriptor | Explanation
5 | ModeI | Mode for initial elevations in blank runs | Default value=0 which yields spatially uniform uplift
7 | ModeSed | Mode for Sediment transport solver | Current default value is 4. ModeSed=5 no longer recommended as 4 is slightly more accurate.
10 | ModeRn | Mode for random perturbation solver | Default=0; no random perturbations ModeRn=1: 'Spatial' multiplies b1 ModeRn=1: 'Spatial' multiplies b5
15 | ModeMC | Mode for Monte-Carlo risk assessment solver | Default=0
16 | DirReg | Averaging region for drainage directions solver | Default=1, See Hancock (1998) PhD thesis.
25 | FactMx | Maximum value for FACTOR in fluvial sediment solver | Default=1
26 | FRanMn | Mean of perturbations in random model | Default=0
28 | YFix | The CIF for fixed Z points in the fluvial sediment solver | Default=1
29 | FRanCV | CV of perturbations in random model | Default=0
30 | b3sds | SD of short term variation in runoff rate | Default=0
31 | b3sdl | SD of long term variation in runoff rate | Default=0
35 | FRanZ | SD of randomisation in the initial elevations in blank runs | Default=0
48 | YHold | YHold threshold in the CIF switching relationship | Default=0.1