Model Constants and Miscellaneous Parameters¶

The VIC model requires the specification of many model parameters to run. While some parameters are spatially distributed (e.g. soil, vegetation, or snowbands), others are more appropriately held constant across the model domain.

Model Constants and Parameters¶

Some model constants and model parameters need to be changed more frequently. VIC-WUR supports this through the use of the optional CONSTANTS file. The path to this file should be specified in the global parameter file.

The table below lists the constants available for manipulation via the CONSTANTS file. Descriptions will be added later or as needed.

Constant	Description	Unit	Default value
DAM_ALPHA	Preferred dam maximum storage fraction	fraction	0.85
DAM_BETA	Dam correction exponent	-	0.6
DAM_GAMMA	Dam correction period	days	5
Ksat_expt	Paddy irrigation saturated conductivity exponent	-	0.33
Wfc_fract	Field capacity as fraction of critical moisture content	fraction	0.8
NONRENEWABLE_LIMIT	Non-renewable withdrawal limit (depth)	mm	Inf