In: Journal of Hydrology and Hydromechanics, vol. 68, no. 2
Silvia Kohnová - Agnieszka Rutkowska - Kazimierz Banasik - Kamila Hlavčová
Details:
Year, pages: 2020, 170 - 179
Language: eng
Keywords:
Catchment curve number; Homogeneity; Regional frequency analysis.
Original source URL: http://www.ih.sav.sk/jhh
About article:
The main objective of the paper was to propose and evaluate the performance of a regional approach to
estimate CN values and to test the impact of different initial abstraction ratios. The curve number (CN) was analyzed for
five Slovak and five Polish catchments situated in the Carpathian Mountains. The L-moment based method of Hosking
and Wallis and the ANOVA test were combined to delineate the area in two homogenous regions of catchments with
similar CN values. The optimization condition enabled the choice of the initial abstraction ratio, which provided the
smallest discrepancy between the tabulated and estimated CNs and the antecedent runoff conditions. The homogeneity in
the CN within the regions of four Slovak and four Polish catchments was revealed. Finally, the regional CN was proposed
to be at the 50% quantile of the regional theoretical distribution function estimated from all the CNs in the region.
The approach is applied in a group of Slovak and Polish catchments with physiographic conditions representative for
the Carpathian region. The main benefit of introducing a common regional CN is the opportunity to apply this procedure
in catchments of similar soil-physiographic characteristics and to verify the existing tabulated CN. The paper could give
rise to an alternative way of estimating the CN values in forested catchments and catchments with a lack of data or
without observations.
How to cite:
ISO 690:
Kohnová, S., Rutkowska, A., Banasik, K., Hlavčová, K. 2020. The L-moment based regional approach to curve numbers for Slovak and
Polish Carpathian catchments. In Journal of Hydrology and Hydromechanics, vol. 68, no.2, pp. 170-179. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2020-0004
APA:
Kohnová, S., Rutkowska, A., Banasik, K., Hlavčová, K. (2020). The L-moment based regional approach to curve numbers for Slovak and
Polish Carpathian catchments. Journal of Hydrology and Hydromechanics, 68(2), 170-179. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2020-0004
About edition:
Publisher: VEDA, Publishing House of the Slovak Academy of Sciences, Bratislava, Slovakia
Published: 15. 6. 2020