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| Titel |
Integrating heterogeneous landscape characteristics into watershed scale modelling |
| VerfasserIn |
S. Julich, L. Breuer, H.-G. Frede |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Proceedings of the 14th Workshop on Large-scale Hydrological Modelling ; Nr. 31 (2012-07-06), S.31-38 |
| Datensatznummer |
250017307
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| Publikation (Nr.) |
 copernicus.org/adgeo-31-31-2012.pdf |
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| Zusammenfassung |
Two versions of the SWAT-model with different dominating runoff generation
processes have been applied. One version comprises the original available
SWAT version where only the basic input data are used. In the second version
SWAT has been modified, by the integration of an impermeable layer at the
subbasin level, in order to better reflect the boundary between soil and
bedrock that results in increased lateral flow in low mountain ranges. As
well, since conventional German soil maps do not describe soil horizons
beyond 2 m depth, we also added a 4 m fixed depth in the lowland areas in
order to reflect the deep loess deposits in this region. The decision for
the location of the impermeable and the additional loess layer was based on
a GIS analysis of additional geologic information.
This study revealed that both model versions produced acceptable and
comparable results regarding the evaluated goodness of fit measures. The
GLUE analysis showed that the SWAT model set up with additional information
about the distribution of impervious soil layers and the loess depth in the
lowlands produced the highest simulation quality and the lowest uncertainty.
Moreover, SWAT II version was able to better represent the spatial extend of
the dominating runoff processes best. This leads to the conclusion that the
SWAT II version is better suited for scenario analysis than the original
model version. |
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