Since 2003 FEAT collaborates with the University of Milano-Bicocca, Dipartimento di Scienze Geologiche e Geotecnologie, http://www.unimib.it to develop a numerical code to analyze rock falls, the related hazard and the associated risk. You need to contact the University of Milano-Bicocca directly for more information about Hy-Stone.

Hy-Stone (Crosta and Agliardi, 2003) is a 3D rock fall simulation program designed to take advantage of a high-resolution description of 3D slope geometry and perform accurate and easy-to-calibrate multi-scale stochastic modeling. The main features of the code are:

- use of Digital Elevation Model (DEM) to describe topography with no restriction on resolution;

- definition of rock fall sources as point, polygons or lines;

- modeling parameters (topography, sources, energy restitution and rolling friction coefficients) are spatially distributed;

- kinematic (lumped mass) and hybrid (mixed kinematic-dynamic) algorithms are implemented to simulate free fall, impact and rolling motions, with different damping relationship available to simulate energy loss at impact or by rolling;

- stochastic modeling to include the the variability parameters;

- elasto-visco-plastic model to simulate impact on soft ground;

- simulation of passive countermeasures with specific geometry and energy absorption capability;

- raster and vectors output, including rock fall frequency, minimum, mean and maximum values of velocity, fly height and energy, as well as information about the type of motion, the location of impacts, etc.

- simulation of the possible presence of vegetation and the occurrence of fragmentation of main blocks into small flying rocks.


G.B. Crosta and F. Agliardi: "A methodology for physically based rockfall hazard assessment", Natural Hazards and Earth System Sciences (2003) 3, 407-422.




... FEAT