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Adv. Geosci., 9, 123-130, 2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
26 Sep 2006
Physically based distributed hydrological modelling of the Upper Jordan catchment and investigation of effective model equations
H. Kunstmann1, A. Heckl1, and A. Rimmer2 1Forschungszentrum Karlsruhe, Institute for Meteorology and Climate Research (IMK-IFU), Kreuzeckbahnstra├če 19, 82467 Garmisch-Partenkirchen, Germany
2Kinneret Limnological Laboratory, PO Box 447, Migdal 14950, Israel
Abstract. Sufficient freshwater availability in the water scarce environment of the Upper Jordan Catchment (UJC) is a central prerequisite for peaceful agricultural and industrial development. Hydrological modelling is required to understand terrestrial water balance and to provide scientifically sound estimates on water availability.

This article aims at two related objectives: First the water balance of the UJC, a hydrogeologically complex catchment located at the borders of Israel, Syria and the Lebanon, is investigated. It is for the first time that a physically based model is set up for this region that accounts both for the entire terrestrial water balance and in particular for the groundwater-surface water interaction. It is shown that the model is able to describe observed river discharges satisfactorily.

Secondly, it is investigated if observed and simulated runoff components can be explained by simple lumped approaches based on 1) linear filter theory and 2) neural networks and what the number of degrees of freedom for the runoff components is. It is exemplary shown for the Ayun subcatchment of the UJC that the simulated river discharge, the direct runoff component and the interflow runoff component as modelled by the physically based distributed hydrological model WaSiM can be described by simple effective equations with only 3 to 5 degrees of freedom. Application of simple lumped approaches to observed river discharge values showed much weaker performance.

Citation: Kunstmann, H., Heckl, A., and Rimmer, A.: Physically based distributed hydrological modelling of the Upper Jordan catchment and investigation of effective model equations, Adv. Geosci., 9, 123-130,, 2006.