Rheological Properties And Debris-flow
Modeling In A Southern Italy Watershed
Author(s)
T. Bisantino, P. Fischer, F. Gentile & G. Trisorio Liuzzi
Abstract
The Pulsano watershed, located in the southern side of Gargano (Puglia-Italy), is
subject to debris-flow phenomena originating from the weathering of the
limestone rocks that constitute the geological parent material. The territory is
poorly monitored and between intense and rare events, which transport large
particle size materials, more frequent hyper-concentrated flows, which transport
heterogeneous sediments, occur. On this basis the debris-flow risk assessment
appears very complex, since it depends on both the available debris volume and
the hydraulic characteristics of the flow. This work proposes a methodology of
analysis and modeling of debris-flows that is able to integrate the results of the
experimental investigations on materials with models simulating the triggering,
propagation and deposition of the flow. For this purpose the rheological response
of natural suspensions collected from the superficial deposits was investigated
using a rheometric tool for large particle suspensions: the Ball Measuring System
(BMS). The triggering and propagation of the debris-flow were simulated using
the SHALSTAB and FLO-2D models in order to reproduce the 15 July 1972
event. Afterwards the influence of rheology on debris-flow depositional features
was investigated.
Keywords: debris-flow, rheology, modeling.
1 Introduction
In recent years some debris-flow events occurred in the South-Gargano
watersheds (Puglia Region-Southern Italy). These phenomena originate from the
weathering of the limestone rocks that constitute the geological parent material
Keywords
debris-flow, rheology, modeling
Related Book
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