Author(s)

M. Cetina & M. Krzyk

Abstract

Two-dimensional mathematical modelling of debris flows with practical applications M. Cetina & M. Krzyk University of Ljubljana, Faculty of Civil and Geodetic Engineering, Ljubljana, Slovenia Abstract The paper deals with mathematical modelling of landslide - debris flow. Onedimensional models can be used in upper parts of the affected regions where debris flow is in a steep narrow canyon, while at relatively flat downstream areas near villages two-dimensional models are neccessary. Two mathematical models are described into more detail: one-dimensional model DEBlUFlD and twodimensional model PCFLOW2D, both developed at the Faculty of Civil and Geodetic Engineering of the University of Ljubljana. Basic continuity and momentum conservation equations were accomplished with the non-Newtonian Bingharn plastic fluid model proposed by O'Brien and Julien. As a case study, numerical simulations of the landslide - debris flow, which occurred in November 2000 and destroyed a part of the village Log pod

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