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Model
===========================================

HBV (Hydrologiska Byråns Vattenbalansavdelning) is a conceptual
hydrological model. For more information on it’s history, see this
`paper <https://hess.copernicus.org/articles/26/1371/2022/>`__.
The actual model implemented here sit looks most like the original model from `1976 <https://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-573>`__.


This current implementation is with a snow reservoir as shown in the diagram below.

.. image:: _images/model_layout.png
   :width: 600
   :alt: `Link <https://github.com/Daafip/HBV-bmi/blob/main/model_layout.png?raw=true>`__

This implementation of the model uses a Markov Chain structure to allow it to be compatible with `Data Assimilation <https://github.com/Daafip/eWaterCycle-DA>`__.
Testing it compared to a normal implementation showed this doesn't affect how the model performs.