 |
| Titel |
Comparative predictions of discharge from an artificial catchment (Chicken Creek) using sparse data |
| VerfasserIn |
H. M. Holländer, T. Blume, H. Bormann, W. Buytaert, G. B. Chirico, J.-F. Exbrayat, D. Gustafsson, H. Hölzel, P. Kraft, C. Stamm, S. Stoll, G. Blöschl, H. Flühler |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 11 ; Nr. 13, no. 11 (2009-11-04), S.2069-2094 |
| Datensatznummer |
250012049
|
| Publikation (Nr.) |
 copernicus.org/hess-13-2069-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Ten conceptually different models in predicting discharge from the
artificial Chicken Creek catchment in North-East Germany were used
for this study. Soil texture and topography data were given to the
modellers, but discharge data was withheld. We compare the
predictions with the measurements from the 6 ha catchment and
discuss the conceptualization and parameterization of the models.
The predictions vary in a wide range, e.g. with the predicted
actual evapotranspiration ranging from 88 to 579 mm/y and the
discharge from 19 to 346 mm/y. The predicted components of the
hydrological cycle deviated systematically from the observations,
which were not known to the modellers. Discharge was mainly
predicted as subsurface discharge with little direct runoff. In
reality, surface runoff was a major flow component despite the
fairly coarse soil texture. The actual evapotranspiration (AET) and
the ratio between actual and potential ET was systematically
overestimated by nine of the ten models. None of the model
simulations came even close to the observed water balance for the
entire 3-year study period. The comparison indicates that the
personal judgement of the modellers was a major source of the
differences between the model results. The most important parameters
to be presumed were the soil parameters and the initial soil-water
content while plant parameterization had, in this particular case of
sparse vegetation, only a minor influence on the results. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|