Velocity and runout simulation of destructive debris flows and debris avalanches in pyroclastic deposits, Campania region, Italy

Revellino, Paola; Hungr, Oldrich; Guadagno, Francesco M.; Evans, Stephen G.

doi:10.1007/s00254-003-0885-z

Cited by 160 publications

(116 citation statements)

References 14 publications

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“…The values that have been used in the subaerial part are reasonable when compared with similar events that are reported in the literature (Bertolo and Wieczorek, 2005;Revellino et al, 2004). For the submerged path, a lower value of the turbulence 33 1 Figure 8.…”

Section: Numerical Modelling Of the 1997 Lake Albano Debris Flow Withsupporting

confidence: 81%

An equivalent fluid/equivalent medium approach for the numerical simulation of coastal landslides propagation: theory and case studies

Bozzano

2009

Nat. Hazards Earth Syst. Sci.

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Abstract. Coastal and subaqueous landslides can be very dangerous phenomena since they are characterised by the additional risk of induced tsunamis, unlike their completelysubaerial counterparts. Numerical modelling of landslides propagation is a key step in forecasting the consequences of landslides. In this paper, a novel approach named Equivalent Fluid/Equivalent Medium (EFEM) has been developed. It adapts common numerical models and software that were originally designed for subaerial landslides in order to simulate the propagation of combined subaerial-subaqueous and completely-subaqueous landslides. Drag and buoyancy forces, the loss of energy at the landslide-water impact and peculiar mechanisms like hydroplaning can be suitably simulated by this approach; furthermore, the change in properties of the landslide's mass, which is encountered at the transition from the subaerial to the submerged environment, can be taken into account. The approach has been tested by modelling two documented coastal landslides (a debris flow and a rock slide at Lake Albano) using the DAN-W code. The results, which were achieved from the back-analyses, demonstrate the efficacy of the approach to simulate the propagation of different types of coastal landslides.

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Section: Numerical Modelling Of the 1997 Lake Albano Debris Flow Withsupporting

confidence: 81%

An equivalent fluid/equivalent medium approach for the numerical simulation of coastal landslides propagation: theory and case studies

Bozzano

2009

Nat. Hazards Earth Syst. Sci.

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“…As the first step in the process of hazard evaluation, we compiled the database with the following main aims: (i) to identify over the whole region the areas most susceptible to flash floods and (ii) to discriminate whenever possible, in the available literature, flash floods in small catchments from floods in alluvial plains and from gravity processes, such as rapid earth or debris flow (Del Prete et al, 1998;Crosta and Dal Negro, 2003;Guadagno et al, 2003Guadagno et al, , 2005Revellino et al, 2004;Zanchetta et al, 2004b;Di Crescenzo and Santo, 2005;Cascini et al, 2008b). Our database is not aimed at a hydrological characterization of the study areas due to lack of hydrological data, especially as concerns the historical events.…”

Section: Introductionmentioning

confidence: 99%

A database on flash flood events in Campania, southern Italy, with an evaluation of their spatial and temporal distribution

Vennari

Parise

Santangelo

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. This study presents an historical database of flash flood events in the Campania region of southern Italy. The study focuses on small catchments characterized by intermittent flow, generally occurring during and after heavy rainstorms, which can be hydrologically defined as small Mediterranean catchments. As the outlet zones of these catchments (consisting mainly of alluvial fans or fan deltas) are highly urbanized in Campania, the population living in the delivery areas is exposed to high risk. Detailed scrutiny and critical analysis of the existing literature, and of the data inventory available, allowed us to build a robust database consisting of about 500 events from 1540 to 2015, which is continuously updated. Since this study is the first step of a longer project to perform a hazard analysis, information about time and site of occurrence is known for all events. As for the hazard analysis envisaged, collecting information about past events could provide information on future events, in terms of damage and also spatial and temporal occurrence. After introducing the issue of flash floods in Italy we then describe the geological and geomorphological settings of the study area. The database is then presented, illustrating the methodology used in collecting information and its general structure. The collected data are then discussed and the statistical data analysis presented.

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“…shallow soil deposits with nearly constant depths and slope angles and they generally occur in 30-45" hillslopes, involving 1-2 m thick deposits of coarse grained and cohesionless soils within several environmental contexts. Typical examples are represented by torrent deposits in USA (Costa and Williams 1984), decomposed granitic soils in Japan (Wang et al 2003), pyroclastic deposits in Southern Italy (Cascini et al 2008b;Guad agno et al 2005;Revellino et al 2004), debris deposits of Va ltellina area (Northern Italy) (Chen et al 2006) and colluvial soils of British Columbia (Hungr et al 2008). …”

Section: Introductionmentioning

confidence: 99%

Inception of debris avalanches: remarks on geomechanical modelling

2012

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Debris avalanches are complex phenomena due to the variety of mechanisms that control the failure stage and the avalanche formation. Regarding these issues, in the literature, ei ther field evidence or qualitative interpretations can be found while few experimental laboratory tests and rare examples of geomechanical modelling are available for technical and/or scientific purposes. As a contribution to the topic, the paper firstly highlights as the problem can be analysed referring to a unique mathematical framework from which different modelling approaches can be derived based on limit equilibrium method (LEM), finite element method (FEM), or smooth particle hydrodynamics (SPH). Potentialities and limitations of these approaches are then tested for a large study area where huge debris avalanches affected shallow deposits of pyroclastic soils (Sarno-Quindici, Southern Italy). The numerical results show that LEM as well as uncoupl ed and coupled stress-strain FEM analyses are able to individuate the major triggering mechanisms. On the other hand, coupled SPH analyses outline the relevance of erosion phenomena, which can modify the kinematic features of debris ava lanches in their source areas, i.e. velocity, propagation patterns and later spreading of the unstable mass. As a whole, the obtained results encourage the application of the introduced approaches to further analyse real cases in order to enhance the current capability to forecast the inception of tl1ese dangerous phenomena.

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Velocity and runout simulation of destructive debris flows and debris avalanches in pyroclastic deposits, Campania region, Italy

Cited by 160 publications

References 14 publications

An equivalent fluid/equivalent medium approach for the numerical simulation of coastal landslides propagation: theory and case studies

An equivalent fluid/equivalent medium approach for the numerical simulation of coastal landslides propagation: theory and case studies

A database on flash flood events in Campania, southern Italy, with an evaluation of their spatial and temporal distribution

Inception of debris avalanches: remarks on geomechanical modelling

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