# SIBERIA: Hydrology Parameters

The parameters controlling the various components of the hydrology models

SIBERIA parameter number | SIBERIA parameter name | Dialog Descriptor | Explanation
12 | ModeROff | Mode for runoff model | The runoff model to use 0 = default model (spatially constant runoff) 1=Spatially random runoff coefficient using spatial state in the RST2 file. 2=Spatially varying rainfall (input in runoff model file) 3=Regions of spatially varied hydrology model (input in runoff model file).
-2 | Runoff | InputFile: Runoff Model | Runoff Model File A supplementary file from which runoff data is read in the more advanced runoff models.
8 | ModeDir | Mode for Drainage Directions Model | The drainage direction model to use 0=default model (drainage in the the steepest downslope direction) 1=as for default except channels must drain into channels 2=Permanent contour banks 3=Drainage directions not allowed to change during run.
-3 | CtrBnk | Input File: Drainage Directions Model | Drainage Directions File A supplementary file from which drainage direction data is read in the more advanced drainage directions models.
#### The Default Hydrology Model:
39 | b3 | Coefficient on the runoff relationship | The runoff coefficent (not to be confused with the runoff coefficent used in the Rational Method)
40 | m3 | Exponent on the area in the runoff relationship | The exponent on area in the runoff equation