E-mail from Stein Beldring:

It is correct that Norwegian Water Resources and Energy Directorate applies a spatially distributed version of the HBV model. This model is distributed in the sense that all model elements are unique based on local land use and soil types and proportion of glaciers and lakes. There is no interaction between the landscape elements, e.g. subsurface flow of water. We usually run the model on a 1 by 1 km2 grid, assuming that there is no groundwater flow between model elements. This assumption is usually valid for Norway with its shallow surface deposits, but probably not for the Netherlands. Discharge generated from the model elements located within a catchment may be accumulated to the outlet, but there is routing involved. However, a utility program that allows streamflow from a network of sub-catchments to be accumulated exists.

A copy of the model code in Fortran may be provided, but there is no documentation on how to use the model. I am sorry that I will not be able to provide assistance with this.

I enclose on report describing the standard HBV model used in Norway. The only difference between this model and the distributed version is the size and shape of the computational elements of the model. The standard version subdivides a catchment into 10 elevation bands, whereas the distributed version applies grid cells. However, the model algorithms applied within an elevation band or grid cell are the same. I also enclose a paper describing the application of the distributed HBV model for producing water balance maps of Norway.

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