Ground Water Level in HBV-soil compartment

A new output variable that corresponds to the groundwater level that is the implicit regulator of the runoff in the HBV Soil Module is introduced.

The name of the Auxiliary variable is:

HBV GroundWaterLevel

The variable is linked to a new function and has 4 parameter to regulate the dependence on the total storage in the two ground water storages of the HBV soil module

The Parameters are





 Meaning that 

Level= Min_GwLev+Sens_GwLev*pow(storage, PowerCoef_GwLev)

But Level is not allowed to exceed Max_GwLev





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