# SIBERIA: Erosion Parameters

The parameters controlling the various components of the erosion models

SIBERIA parameter number | SIBERIA parameter name | Dialog Descriptor | Explanation
11 | ModeErod | Mode for sediment transport model | The erosion model to use 0 = default model. (Spatially uniform erodibility). 1=Erosion depth dependent erodibility (input in erosion model file) 2=Spatially random erodibility using spatial state in the RST2 file. 3=Regions of spatially varied fluvial erosion model (input in erosion model file)
-1 | Erode | InputFile: Sediment Transport Model | Erosion Model File A supplementary file from which erosion data is read in the more advanced sediment transport models.
#### The Default Sediment Transport Model:
#### Fluvial Sediment Transport Model Component:
39 | b1 | Coefficient on the fluvial transport relationship | The soil erodibility
40 | m1 | Exponent on the discharge in the fluvial transport relationship | The exponent on discharge in the fluvial sediment transport equation
41 | n1 | Exponent on the slope in the fluvial transport relationship | The exponent on slope in the fluvial sediment transport equation
24 | QSTHold | Fluvial transport threshold | A threshold below which fluvial sediment transport does not occur
59 | b12 | Coefficient on the second fluvial fluvial transport equation | (RESEARCH ONLY) The erodibility of a second fluvial sediment process. This process occurs in the channel ... the first process (i.e. b1) occurs on the hillslope.
60 | m12 | Exponent on discharge for the second fluvial transport equation | (RESEARCH ONLY) The exponent on discharge in a second fluvial sediment transport process. This process occurs in the channel ... the first process (i.e. m1) occurs on the hillslope.
53 | Ot | The ratio of overland: channel fluvial transport rate | The ratio of the erodability on the hillslope compared to that in the channel. A value of less than 1 indicates that hillslopes have a lower erodibility than channels
42 | BulkDen | Bulk density of the soil | This is the bulk density of the eroded sediment. This is used to convert between tonnes of sediment eroded and the equivalent cubic metres of sediment. If the sediment transport rate is expressed in cubic metres of sediment per time step then this correction is unnecessary and Bulk=1
50 | Cover | Vegetation cover factor | A cover factor that can allow for vegetation effects or agricultural practice (ala the correction factors in the USLE, etc)
#### Diffusive Sediment Transport Model Component:
21 | Dz | Diffusivity of diffusive transport | Diffusivity of diffusive transport
22 | Dzn | Nonlinearity of diffusive transport | Nonlinearity of diffusive transport
23 | dZTHold | Diffusive transport threshold | Diffusive transport threshold below which diffusive transport does not occur
Not Included in EAMS interface: (Available only through running SIBERIA directly) The diffusive transport is modified from above as follows
51 | s0max | - | Slope stability threshold for diffusive transport