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| Titel |
Methodology for flood frequency estimations in small catchments |
| VerfasserIn |
V. David, T. Davidova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 10 ; Nr. 14, no. 10 (2014-10-01), S.2655-2669 |
| Datensatznummer |
250118704
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| Publikation (Nr.) |
 copernicus.org/nhess-14-2655-2014.pdf |
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| Zusammenfassung |
| Estimations of flood frequencies in small catchments are difficult due to a
lack of measured discharge data. This problem is usually solved in the Czech
Republic by hydrologic modelling when there is a reason not to use the data
provided by the Czech hydrometeorological institute, which are quite
expensive and have a very low level of accuracy. Another way is to use a
simple method which provides sufficient estimates of flood frequency based on
the available spatial data. A new methodology is being developed considering
all important factors affecting flood formation in small catchments. The
relationship between catchment descriptors and flood characteristics has been
analysed first to get an overview of the importance of each considered
descriptor. The results for different descriptors vary from a highly
correlated relationship of an expected shape to a relationship which is
opposite to that expected, mainly in the case of land use. The
parameterisation of the methodology is also presented, including the
sensitivity tests on each involved catchment descriptor and cross-validation
of achieved results. In its present form, the methodology achieves an
Radj2 value of about 0.61 for 10- and 0.60 for 100-year return
periods. |
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