Debris-flow event in the Frangerello Stream-Susa Valley (Italy)—calibration of numerical models for the back analysis of the 16 October, 2000 rainstorm

Bertolo, Paola; Bottino, Giannantonio

doi:10.1007/s10346-007-0099-7

Cited by 21 publications

(10 citation statements)

References 3 publications

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“…They always entail detailed geological and geomorphological field surveys with the production of several thematic maps often coupled with analysis of remotely sensed data, geographic information system applications (digital elevation model (DEM) production, Spatial analysis, etc.) and numerical modeling (Berti & Simoni, 2007;Bertolo & Bottino 2008;Hurlimann, Copons, & Altimir, 2006;Pelletier et al, 2005). This paper presents some examples of geomorphological mapping at various scales applied to the problem of defining areas prone to alluvial fan flooding.…”

Section: Introductionmentioning

confidence: 99%

Multiscale map analysis in alluvial fan flood-prone areas

2015

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Several case studies of geomorphological mapping at various scales in order to identify areas prone to alluvial fan flooding are presented in this paper. The selected areas are located in southern Italy and are representative of a geomorphic unit (foothills consisting of coalescent alluvial fans) found throughout the southern Apennines. The medium-scale approach represents the best tool to identify areas susceptible to flooding, using detailed geomorphological mapping of fan systems. It can be considered a preliminary analysis, which provides important information for large areas and identifies zones which need further investigation. Large-scale map analysis may be applied to a single fan and used to distinguish fan portions prone to different degrees of hazard exposure, thus providing accurate information for decision-makers who are called upon to plan hazard management. In both cases, analysis based on detailed geological and geomorphological field surveys is often coupled with remotely sensed data.Keywords: Medium and Large scale maps; urbanized alluvial fan; flooding susceptibility; GIS applications; Southern Italy; debris flow 1. Introduction Piedmont areas consisting of coalescent alluvial fans are commonly occurring geomorphological units worldwide (Bull, 1968(Bull, , 1977. Due to their gentle slope, they are often prime spots for urban development. However, during intense storms, they may be affected by flooding and/or debris flow processes, thus becoming prone to hazardous phenomena.Flood susceptibility assessment in fan contexts is a major challenge, although to date this has received little attention. Papers dealing with other kinds of natural hazards such as landslides in mountain and hill areas (Aleotti & Chowdhury, 1999;Capparelli, Versace, & Biondi, 2013;Cascini, Bonnard, Corominas, Jibson, & Montero-Olarte, 2005;Castelli et al., 2002; JTC-1, 2008;Olivares & Picarelli, 2003;Sorbino, Sica, & Cascini, 2010) and flood hazards in floodplains (Canuti & Casagli, 1996;Guzzetti, Stark, & Salvati, 2005; Jalayer et al., 2014;Van Westen, 2000) are more numerous than those regarding flood susceptibility assessment in fan contexts.

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Section: Introductionmentioning

confidence: 99%

Multiscale map analysis in alluvial fan flood-prone areas

2015

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“…The commercially available Flo-2D simulation model [O'Brien et al, 1993] has possibly been most widely applied to natural debris flows or compared with other models [e.g., Chuang et al, 2000;Sosio et al, 2007;Armento et al, 2008;Bertolo and Bottino 2008;Marchi et al, 2010]. In some of these applications the Bingham model parameters were inferred from the measured rheology of samples of the fine material slurry.…”

Section: Flow Modelling and Runout Prediction On The Fanmentioning

confidence: 99%

Debris-Flow Hazard Assessment and Methods Applied in Engineering Practice

Rickenmann

2016

IJECE

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Debris flows constitute a major natural hazard in mountainous regions. The main elements required for a practical hazard assessment include the following steps: (i) estimation of potential initiation zones and sediment sources, (ii) establishment of a relation between the magnitude and frequency of expected future debris-flow events, and (iii) assessment of the flow behavior and delineation of areas potentially endangered by flowing debris. A general overview is presented of the main triggering conditions and initiation mechanisms for debris-flow formation. A brief summary is given of methods to establish a magnitude-frequency relation and to estimate the total volume of sediments transported to the fan during so-called "design" events. To assess the runout distance of debris flows and potentially affected areas, either simple empirical approaches or more physically based numerical simulation models may be used. An example application for a Swiss debris fan illustrates the variability of the results when using three different debris-flow simulation models, even though all three models were first calibrated based on the observed deposition areas of a past event.

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“…As these phenomena represent a serious threat for the many communities established on footslopes, several approaches for correctly assessing the risk have been proposed (Berti & Simoni, 2007;Bertolo & Bottino, 2008;Hurlimann, Copons, & Altimir, 2006;Pelletier et al, 2005). At the same time, geological and geomorphological studies at larger scales (1:5000-1:1000) are of the utmost importance (Scorpio, Santangelo, & Santo, 2016).…”

Section: Introductionmentioning

confidence: 99%