In: Journal of Hydrology and Hydromechanics, vol. 64, no. 4
Katarína Jeneiová - Silvia Kohnová - Julia Hall - Juraj Parajka
Detaily:
Rok, strany: 2016, 357 - 366
Kľúčové slová:
Seasonality; Summer and winter floods; Upper Danube River basin; Comparative hydrology.
URL originálneho zdroja: http://www.ih.savba.sk/jhh
O článku:
The objective of this study is to analyse the spatial variability of seasonal flood occurrences in the Upper
Danube region for the period 1961-2010. The analysis focuses on the understanding of the factors that control the spatial
variability of winter and summer floods in 88 basins with different physiographic conditions. The evaluation is based on
circular statistics, which compare the changes in the mean date and in the seasonal flood concentration index within a
year or predefined season.
The results indicate that summer half-year and winter half-year floods are dominant in the Alps and northern Danube
tributaries, respectively. A comparison of the relative magnitude of flood events indicates that summer half-year floods
are on average more than 50% larger than floods in winter. The evaluation of flood occurrence showed that the values of
seasonal flood concentration index (median 0.75) in comparison to the annual floods (median 0.58) shows higher temporal
concentration of floods. The flood seasonality of winter events is dominant in the Alps; however, along the northern
fringe (i.e. the Isar, Iller and Inn River) the timing of winter half-year floods is diverse. The seasonal concentration of
summer floods tends to increase with increasing mean elevation of the basins. The occurrence of the three largest summer
floods is more stable, i.e. they tend to occur around the same time for the majority of analysed basins. The results
show that fixing the summer and winter seasons to specific months does not always allow a clear distinction of the main
flood generation processes. Therefore, criteria to define flood typologies that are more robust are needed for regions such
as the Upper Danube, with large climate and topographical variability between the lowland and high elevations, particularly
for the assessment of the effect of increasing air temperature on snowmelt runoff and associated floods.
Ako citovať:
ISO 690:
Jeneiová, K., Kohnová, S., Hall, J., Parajka, J. 2016. Variability of seasonal floods in the Upper Danube River basin. In Journal of Hydrology and Hydromechanics, vol. 64, no.4, pp. 357-366. 0042-790X (until 2019) .
APA:
Jeneiová, K., Kohnová, S., Hall, J., Parajka, J. (2016). Variability of seasonal floods in the Upper Danube River basin. Journal of Hydrology and Hydromechanics, 64(4), 357-366. 0042-790X (until 2019) .