Modeling of a debris flow from the Hrenovec torrential watershed above the village of Kropa
Cesar, Polona (Author), Šraj, Mojca (Mentor) More about this mentor... This link opens in a new window, Sodnik, Jošt (Author), Mikoš, Matjaž (Author)

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In this paper, debris-flow modeling is shown specifically on the basis of a potential debris flow from the Hrenovec torrential watershed above the village of Kropa in NW Slovenia. This site was chosen, because in this particular torrential watershed a small surficial landslide turned into a debris flow during a storm on September 18, 2007. Fortunately, the debris flow stopped inside the torrential channel above the village of Kropa. Using public available data on rainfall and topography, we developed two scenarios of debris-flow triggering with an estimated magnitude of 50,000m(3). According the first scenario, a debris flow triggers during rainfall with the 100-year return period, and according the second one, it triggers during extreme rainfall as measured during the storm on September 18, 2007. For both scenarios, we used for debris-flow modeling a commercial two-dimensional mathematical model Flo-2d. The obtained results are shown in the form of computed flow depths and velocities over a cartographic background. The results show to possible catastrophic consequences in the village of Kropa, much worse that set in by torrential flood during the storm on September 18, 2007.

Keywords:geografija, pobočni procesi, drobirski tokovi, ocena ogroženosti, matematično modeliranje, Kropa, Slovenija
Work type:Not categorized (r6)
Organization:FGG - Faculty of Civil and Geodetic Engineering
Publisher:Anton Melik Geographical Institute
Number of pages:59-84
DOI:10.3986/AGS50103 Link is opened in a new window
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Keywords:geography, slope processes, debris flows, risk assessment, mathematical modeling, Kropa, Slovenia

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