Some aspects of the initiation of debris avalanches in the Campania Region: the role of morphological slope discontinuities and the development of failure

Guadagno, Francesco M.; Forte, R.; Revellino, Paola; Fiorillo, Francesco; Focareta, Mariano

doi:10.1016/j.geomorph.2004.09.024

Cited by 94 publications

(42 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1). The Campania region territory is widely subjected to hydrologically controlled instability processes, including several types of phenomena, such as subsidence, earthflows, mudflows, debris avalanches and flooding (Calò et al, 2012;Guadagno et al, 2005;Revellino et al, 2010). The primary predisposing factor to landslide in the area is the complex geological setting (Matano, 2002), with high tectonic and structural control on the drainage architecture via the effect of a network of faults and folds on the sedimentary units (Pescatore et al, 1996).…”

Section: The Montaguto Earthflowmentioning

confidence: 99%

GB-InSAR monitoring and observational method for landslide emergency management: the Montaguto earthflow (AV, Italy)

Ferrigno

Gigli

Fanti

et al. 2017

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. On 10 March 2010, because of the heavy rainfall in the preceding days, the Montaguto landslide (Southern Italy) reactivated, affecting both state road 90 "Delle Puglie" and the Rome-Bari railway. A similar event occurred on May 2005 and on September 2009. As a result, the National Civil Protection Department (DPC) started an accurate monitoring and analysis program. A monitoring project using the GB-InSAR (ground-based interferometric synthetic aperture radar) system was emplaced to investigate the landslide kinematics, plan urgent safety measures for risk mitigation and design long-term stabilization work.Here, we present the GB-InSAR monitoring system results and its applications in the observational method (OM) approach. GB-InSAR is an established instrument for longterm campaigns aimed at early warning and monitoring during construction works. Our paper further develops these aspects in that it highlights how the OM based on the GBInSAR technique can produce savings in terms of cost and time in engineering projects without compromising safety. This study focuses on the key role played by the monitoring activities during the design and planning activities, with special reference to the emergency phase.

show abstract

Section: The Montaguto Earthflowmentioning

confidence: 99%

GB-InSAR monitoring and observational method for landslide emergency management: the Montaguto earthflow (AV, Italy)

Ferrigno

Gigli

Fanti

et al. 2017

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…1, but it is not proposed a physically based interpretation of this field evidence. Finally, referring to these zones, Guadagno et al (2005) propose morphometrical analyses of the main geometrical features of the landslides so urce areas, such as apex angle of the source areas, height of natural and anthropogenic scarps, slope length, slope angle and initial volume; however, these factors are poorly correlated each other, probably due to the analysis of different undistinguished mechanisms.…”

Section: Case Study the May 1998 Sarno-quindici Debris Avalanchesmentioning

confidence: 99%

“…In the scientific literature, distinct triggering mechanisms are indicated for the inception of debris avalanches: (1) the impact of failed soil masses on stable deposits (Costa and Williams 1984;Di Crescenzo and Santo zoos;Guadagno et al 2005;Hutchinson and Bhandari 1971;Wang et al 2003); (2) direct rainfall infiltration from the ground surface, locally facilitated by anthropogenic factors such as mountain roads and tracks (Guadagno et al 2005); (3) karst spring from bedrock as observed for pyroclastic soils in southern ltaly (Budetta and de Riso 2004;Cascini et al 2oo8b;Cascini et al 2005;Di Crescenzo and Santa 2005;Guadagno et al 2005), (4) runoff from bedrock outcrops as evidenced for shallow landslides in cohesionless soils of the Eastern Italian Alps (Tarolli et al 2008); and (5) multiple failures in the landslides source areas, as recently evidenced by Cascini et al (zoo8b). The scientific literature also indicate that (t) all these triggering mechanisms originate small translational slides (Cruden and Varnes 1996); (2) tlte failed mass increases its volume inside triangular-shaped areas during the so-called "avalanche formation", which is mostly explained referring to soil liquefaction induced by impact loading (Hungr et al 2008); and (3) soil erosion along the landslide propagation patl1 may also play a paramount role (jakob and Hungr 2005;McDougall and Hungr 2005).…”

Section: Introductionmentioning

confidence: 99%

Inception of debris avalanches: remarks on geomechanical modelling

2012

View full text Add to dashboard Cite

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.

show abstract

“…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.

View full text Add to dashboard Cite

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.

show abstract

Some aspects of the initiation of debris avalanches in the Campania Region: the role of morphological slope discontinuities and the development of failure

Cited by 94 publications

References 18 publications

GB-InSAR monitoring and observational method for landslide emergency management: the Montaguto earthflow (AV, Italy)

GB-InSAR monitoring and observational method for landslide emergency management: the Montaguto earthflow (AV, Italy)

Inception of debris avalanches: remarks on geomechanical modelling

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

Contact Info

Product

Resources

About