engleski

Validation study of debris flow movement – laboratory experiments and numerical simulation

Experimental physical model for debris flow movement and Hydro-Debris 2D numerical model for its calibration are described. To understand the general behaviour of particle segregation in debris flow, a physical model experiments for debris flow with two distinct diameters were conducted. Furthermore, the high-speed video camera (HSVC) results, tracing each particle movement are compared with the solutions of Hydro Debris 2D Model (HD2DM), a Lagrangian sediment particle tracing numerical scheme. The underlying purpose of this study is to ultimately understand the characteristic movements of stony debris flow and to develop an improved and reliable numerical model to predict the debris flow disasters, through laboratory experiments and numerical simulation models. The paper presents comparisons of particle velocities in the two models by varying input data. In the framework of the Croatian-Japanese bilateral scientific project entitled "Risk Identification and Land-Use Planning for Disaster Mitigation of Landslides and Floods in Croatia”, a experimental physical model of the debris flow propagation was created at the Faculty of Civil Engineering, University of Kyoto (Japan). Such physical model provided some of the most significant quantitative values of input model parameters used to create numerical models of debris flow.

debris flow; experimental physical model; Hydro-Debris 2D numerical model; high-speed video camera; particle velocity

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