EGU24-14834, updated on 09 Mar 2024
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

A finite volume code for simulating debris-flow routing: preliminary results

Matteo Barbini1, Martino Bernard1, Stefano Lanzoni2, and Carlo Gregoretti1
Matteo Barbini et al.
  • 1Department of Land, Environment, Agriculture and Forestry, University of Padova, Legnaro (PD), Italy
  • 2Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova (PD), Italy

The bi-phase governing flow equations of a solid-liquid mixture are numerically integrated within the shallow water approximation using the finite volume method. The one-dimensional FORCE scheme is extended to the two-dimensional case and reviewed for use with a structured computational grid comprising quadratic cells.  The intermediate points, at which the solution is computed at time , correspond to the corners of a cell, and this solution is derived from the values of the four surrounding cells adjacent to the corner. Consequently, the solution for a (i, j) cell within the domain depends on the four intermediate solutions computed at the corners: ,, ,. Subsequently, for a (i, j) cell, the t+1 solution is reliant on the value of the at that cell and the values of its eight neighbouring cells. The model is used for replicating the flow depth, velocity, and solid concentration values observed in a systematic series of flume experiments documented in the literature. The comparison shows good agreement for solid concentration and satisfactory alignment for flow depth and velocity values. Finally, the model is used for reproducing the flow pattern of the debris flow that occurred on Rio Lazer on November 4th, 1966. The comparison results are satisfactory.

How to cite: Barbini, M., Bernard, M., Lanzoni, S., and Gregoretti, C.: A finite volume code for simulating debris-flow routing: preliminary results, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-14834,, 2024.