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| Titel |
Rainfall input generation for the European Soil Erosion Model |
| VerfasserIn |
P. Strauss, F. Konecny, W. E. H. Blum  |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 3, no. 2 ; Nr. 3, no. 2, S.213-221 |
| Datensatznummer |
250000910
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| Publikation (Nr.) |
 copernicus.org/hess-3-213-1999.pdf |
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| Zusammenfassung |
| A procedure to generate rainfall input for the EUROpean Soil Model is
presented. To develop such a procedure, first of all the influence of rainfall
event amount, rainfall event duration, and time to peak intensity of event
rainfall on soil losses, calculated with EUROSEM, has been tested for several
rainfall stations. Results revealed that every tested rainfall parameter had
highly significant influence on computed soil loss. Therefore, distributions for
each station of the dataset and for each of these rainfall parameters were
calculated. To simulate rainfall event amounts, a mixed exponential distribution
was applied. After transformation of rainfall event durations, their
distribution could be simulated using a normal distribution. The location of the
peak intensity was estimated using a kernel estimator, because no specific
distribution characteristics could be identified. According to the respective
distribution functions, parameter values for each of the tested rainfall event
characteristic were then generated. These values were used to select rainfall
events with identical parameter values out of the rainfall station-specific
dataset. Computed soil losses for events selected this way were compared with
soil losses calculated with available station specific rainfall event data.
Comparisons for the respective means and medians generally revealed good
agreement. A comparison of 75 % quartiles resulted in less good agreement,
especially for test conditions with high soil losses. In general, the applied
procedure was capable of simulation station-specific soil losses and of
reflecting different environment conditions for the respective stations.
Therefore, it seems possible to produce site specific appropriate rainfall input
for EUROSEM, only with the knowledge of distributions for the investigated basic
rainfall parameters. These are normally easier to obtain than long term rainfall
information with high temporal resolution which would otherwise be necessary. In
order to improve the procedure and make it practically useful, it will be
necessary to account for seasonal changes of distributions of basic rainfall
event parameters. |
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