DOI: 10.5176/2251-3361_GEOS12.59
Authors: Alessandro Simoni, Maria Mammoliti, Cristoph Graf
Abstract: Zoning and emergency plans require the definition of
debris flow scenarios that can be defined only by means of
simulations with mathematical models. To test the RAMMS code
in reproducing the depositional behavior of the events, we backanalyzed
7 debris flows, ranging in volume from 3.000 to 95.000
m3, selected from a database of documented events in alpine
mountain catchments of northeastern Italy. Simulations, carried
out with the support of high-resolution topographic information
derived from LiDAR, used rheological characteristics μ and ξ as
calibration parameters which allowed to measure objectively the
prediction reliability. Results indicate that the model is capable to
reproduce the observed behavior in terms of inundated areas, by
using a narrow range of rheological parameters.
Keywords: debris flow, depositional processes, RAMMS,
Voellmy rheology, back-analysis
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