| The paper presents two different levels of regionalization used to represent
the spatial distribution of landscape parameters for the hydrological
modelling of the Mulde.
The aim of this investigation was to find out how the discretisation level
affects quality of modelling with the hydrological modelling system J2000.
Furthermore we improved our understanding of the applicability and
reliability of the distributed model J2000 on the macro-scale.
Spatial information was aggregated in two different discretisation levels:
subbasins (SB) and hydrological response polygons (HRP). A J2000 simulation
was carried out for both discretisation levels based on a 1 year calibration
and a 3 year validation period.
Simulations performed well for both levels of spatial discretisation. The
results seemed to be better in the more complex discretisation approach,
where the Nash-Sutcliffe coefficient was higher. We can conclude that our
first results show more accurate simulations produced by the HRP
discretisation approach, the visual inspection shows a better application of
the SB approach to the reproduction of the base flow. |