Analysis And Modeling Of Debris Flows
In Gargano Watersheds (Puglia Region,
Southern Italy)
Author(s)
F. Gentile, T. Bisantino, S. Puglisi & G. Trisorio Liuzzi
Abstract
In the past, the alluvial fan of Pulsano torrent, located on the southern hillslope
of the promontory of Gargano, was exposed to intense debris flows.
In this paper, a methodology of debris flows modeling is applied to the
watershed to delineate the hydrogeological risk situations in valley areas. For
this purpose, hazard potential and vulnerability conditions of the concerned areas
are investigated in order to plan and guide measures aimed at limiting the
damages such hazards may cause.
Keywords: debris flow, risk assessment, control measures.
1 Introduction
The southern hillslope of the Gargano promontory (Puglia Region, Southern
Italy) is crossed by several torrents shaped in calcareous formations prone to
mechanical erosion caused by heavy rainfall.
In the last century some exceptional events have affected the area between the
Monte Sant’Angelo and Manfredonia towns Curci et al. [1]. The debris flow that
occurred on 15 July 1972 was the most catastrophic event. It caused fatalities in
the town of Manfredonia. Cars were swept away by the flow and deposited along
the streets that turned into conveyance channels, and the surrounding agricultural
areas were flooded. In view of that, hydraulic management works (check dams,
gabions or concrete banks, sills) were built in some watersheds.
This paper describes a methodology to analyse debris flow risk in this area,
starting from the estimation of potential debris volumes. This is followed by the
debris flow modeling targeted at producing hazard mapping and the land
Keywords
debris flow, risk assessment, control measures.
Related Book
Other papers in this volume
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