| Abstrakt: |
Abstract: In this paper the seasonality of summer, winter and annual maximum discharges in mid-sized catchments of Slovakia was analysed. The seasonality measure represents an important indicator of flood processes and can be used as a pooling characteristic in regional flood frequency analysis. The seasonality characteristics such as mean date of flood occurrence (DQ) and seasonal concentration index (r) were derived in 142 Slovak catchments, with the lengths of observation 20 to 70 years. The DQ value represents the fictive centre of the occurrence of Qmax within a year and the weighted value of all dates of Qmax occurrence; the index r expresses a measure of the variability of the date of occurrence and it is based on the principles of directional statistics. The analysis of summer, winter and annual flood seasonality in the territory of Slovakia showed that a majority of the catchments show higher potential for summer floods than winter floods. Catchments with high flood risk are located mainly in the flysch region of Slovakia, the Spis Region and the Laborec Mountains, the Slovenske Rudohorie, the Slovenske stredohorie Mts. and the Fatra Region. |
