Papers by Rosamaria Trizzino
Landsliding Evolution of a Coastal Slope in Central Italy (Vasto, Ch) related to Climate changes from Middle - Pleistocene to the present
EGU General Assembly Conference Abstracts, Apr 1, 2018
Temporal and Spatial Variability in Landslide Susceptibility Analyses
EGU General Assembly Conference Abstracts, May 1, 2014
Bulletin of Engineering Geology and the Environment, 2000
On 29 December 1993, a slump-earthflow was activated in the outskirts of Senerchia (southern Ital... more On 29 December 1993, a slump-earthflow was activated in the outskirts of Senerchia (southern Italy) in a locality named "Vadoncello". Mass movement has been active until the time of writing, at a variable rate. Maximum velocity was reached during 1995, when a seismic sequence of low magnitude (maximum 3.6) was recorded. The landslide evolution was studied considering both the characteristics of seismic activity and slope stability conditions. The results of the analyses showed that the role of seismic action in triggering mass movement is uncertain, although it cannot be excluded. Slope behaviour is more likely to have been controlled by morphological and hydrogeological factors and their modifications, which could also have been responsible for the vulnerability of the slope. In conclusion, the mass movement observed in 1995, triggered by the possible contribution of low magnitude shocks repeated at short intervals, determined new and more stable equilibrium conditions in the slope.
Attività sismica e franosità: il caso della frana di Serra dell’Acquara (Senerchia - AV)
ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
In this paper the results of some surveys carried out in an area of Apulian territory affected by... more In this paper the results of some surveys carried out in an area of Apulian territory affected by serious environmental hazard are presented. Unmanned Aerial Vehicles (UAV) are emerging as a key engineering tool for future environmental survey tasks. UAVs are increasingly seen as an attractive low-cost alternative or supplement to aerial and terrestrial photogrammetry due to their low cost, flexibility, availability and readiness for duty. In addition, UAVs can be operated in hazardous or temporarily inaccessible locations, that makes them very suitable for the assessment and management of environmental risk conditions. In order to verify the reliability of these technologies an UAV survey and A LIDAR survey have been carried outalong about 1 km of coast in the Salento peninsula, near the towns of San Foca, Torre dellOrso and SantAndrea( Lecce, Southern Italy). This area is affected by serious environmental risks due to the presence of dangerous rocky cliffs named falesie. The UAV p...
Multi-scale approach to analyse the evolution of soft rock coastal cliffs and role of controlling factors: a case study in South-Eastern Italy
The evolution of soft rock coastlines is strictly related to natural and anthropogenic conditions... more The evolution of soft rock coastlines is strictly related to natural and anthropogenic conditions, which in some cases can determine also an acceleration of coastal retreat. The recent evolution of...
Comparative Analysis of Satellite Stereo Images Methods and Traditional Techniques for Environmental Risk Monitoring
On 29 December 1993, a slump-earthflow was activated in the outskirts of Senerchia (southern Ital... more On 29 December 1993, a slump-earthflow was activated in the outskirts of Senerchia (southern Italy) in a locality named "Vadoncello". Mass movement has been active until the time of writing, at a variable rate. Maximum velocity was reached during 1995, when a seismic sequence of low magnitude (maximum 3.6) was recorded. The landslide evolution was studied considering both the characteristics of seismic activity and slope stability conditions. The results of the analyses showed that the role of seismic action in triggering mass movement is uncertain, although it cannot be excluded. Slope behaviour is more likely to have been controlled by morphological and hydrogeological factors and their modifications, which could also have been responsible for the vulnerability of the slope. In conclusion, the mass movement observed in 1995, triggered by the possible contribution of low magnitude shocks repeated at short intervals, determined new and more stable equilibrium conditions in the slope. Résumé Le 29 decembre 1993, un glissement de terrain se produit dans la périphérie de Senerchia (Italie du sud), dans une localité appelée "Vadoncello". Le mouvement de terrain était en activité de manière variable jusqu'à ce jour: la vitesse maximum fut atteinte en 1995, quand fut enregistrée une séquence sismique de faible magnitude (maximum 3.6). L'évolution du glissement de terrain fut étudiée en considérant aussi bien les caractéristiques de l'activité sismique que les conditions de stabilité de la pente. Les résultats des analyses ont montré qu'il n'est pas certain que l'action sismique ait eu un rôle dans le déclenchement du mouvement de terrain, bien que ceci ne soit pas exclu. Le comportement de la pente a été plus probablement contrôlé par des facteurs morphologiques et hydrogéologiques et leurs modifications; ainsi, ces derniers peuvent avoir été la cause de la vulnérabilité de la pente même. En conclusion, le mouvement de terrain observé en 1995, que des chocs sismiques faibles, mais à intervalles répétés, ont pu contribuer à déclencher, a conduit à de nouvelles et plus stables conditions d'équilibre sur la pente. Key words Landslide 7 Slope stability 7 Seismicity 7 Ground motion 7 Critical acceleration Mots clés Glissement de terrain 7 Stabilité de pente 7 Sismicité 7 Mouvement sismique 7 Accélération critique
The present study deals with a very important but not very well-known cultural heritage area, whi... more The present study deals with a very important but not very well-known cultural heritage area, which is located in Southern Italy, in the municipality of Ascoli Satriano (in the Foggia province). The area represents the vestige of one of the principal settlements of the Daunian peoples (VI-IV century B.C.). In this area, the Carapelle Valley represented an ancient communication route between the Campania Region and the Apulia "Tavoliere", ever since a very fertile territory, where many flourishing rural communities established themselves. On the "Collina del Serpente" (the Snake hill) systematic research of the University of Innsbruck allowed to locate the remains of the ancient town of Ausculum as well as a large Necropolis (IV century B.C.) with very rich funeral furnishings. Not far away, in the Carapelle valley, at the Faragola site, the archaeological excavations unearthed a beautiful luxurious "domus romana" of late ancient times (IV-VI century A.D.). Based on the principle that preservation of cultural/archaeological heritage starts from recognition and measuring of the opus, the work presented here treats the first phase of the study of the whole archaeological area. This research proposes the establishment of a GIS (Geographic Information System) which classifies all the information already collected by various study groups, in order to be able to present a "virtual museum" useful for utilization by more extensive audience.
The new survey techniques allow for a more detailed depiction of the characteristics of the cultu... more The new survey techniques allow for a more detailed depiction of the characteristics of the cultural heritage of which our country is so rich. Unmanned Aerial Vehicles (UAV) are emerging as a key engineering tool for future environmental survey tasks. UAV aerial imagery offers both timely (on demand) and more detailed (higher resolution) information than comparable satellite imagery. In the present study the opportunities of obtaining more detailed documentation of cultural goods throughout UAV survey have been investigated. The survey was conducted on an ancient Aragonese watchtower of the seventeenth century, located near the Abbey of San Vito in the countryside of Polignano a Mare (in the province of Bari, Southern Italy) (Fig.1). The high resolution of the produced images, approximately 1 cm x pixels, allows to obtain all elements of both structural and qualitative information required for a conservative restoration project of the monument. The peculiarity of the transportation ...
1. INTRODUCTION The evolution of stresses inside a soil slope mass and the consequent change of t... more 1. INTRODUCTION The evolution of stresses inside a soil slope mass and the consequent change of the status from stability towards instability, is usually described by the variation of the resistant and active forces (or moments) ratio, known as safety factor (Fs). In this ratio, the active forces are quite easily determined, whereas the shear strength is usually determined by geotechnical laboratory tests, or, less often, by in situ tests. In both cases, however, measurements may be affected by numerous uncertainties, caused, for each type of soil, by the following: • scale and shape factors • anisotropy and non homogeneity • dependence on the strain • non representativeness of the sampling • sampling or probe preparation disturbances • test errors, such as, the use of distilled water interacting with soil, or, anyhow, of water with a different chemism from that of the interstitial water (Spilotro, Fidelibus, 1995 ; Di Maio, 1996). For these reasons, the strength, (mean along failur...
Countrywide overviews of data on earthquake influence on underground facilities: Irpinia earthquake, Italy
The study is part of a countrywide overview of field data from many countries in the world. The i... more The study is part of a countrywide overview of field data from many countries in the world. The issue has been realized as a part of a Project of the Swedish Nuclear Fuel and Waste Management Company on " Effects of earthquakes on Underground Facilities ". This Project is aimed to assess the seismic hazard on deep repository for spent fuel. The deep repository is designed to keep radiation well below the natural, ambient radiation for any time in the future. The safety function is achieved by a combination of engineered and natural barriers. One important safety issue is that in the future displacements in the rock should not execeed 0.1 m at the precise location where the engineered canister containing the waste are emplaced in the rock. So, the safety case for a deep repository for spent fuel should include an earthquake scenario. The project aims to re-compile field evidences of seismic damage on underground facilities, to shed additional light on the matter of friction...
Hydrogeological conditions and field monitoring of the Galeso submarine spring in the Mar piccolo of taranto (Southern Italy)
Numerical Modeling of Interrelationships Between Linear Transportation Infrastructures and Hydro-geological Hazard in Floodplains
Engineering Geology for Society and Territory - Volume 6, 2014
ABSTRACT The development and efficiency of transportation infrastructures has always been a centr... more ABSTRACT The development and efficiency of transportation infrastructures has always been a central element in the planning and management of territory, not only with regard to the social and economic aspects but also for the management of environmental emergencies, in particular those of Civil Protection. In the valleys most usual design solution is the road embankment. In the presence of a surface water table the realization of a road embankment causes more or less marked alterations of the piezometric levels, with serious problems to vehicular traffic. Typically in such situations to avoid the risk of flooding of the roadway engineers tend to in- crease the height of the embankment, thus increasing the overload in the founda- tion soil and thereby creating new risk situations. In this paper it is proposed a modeling study aimed at determining the interactions between the geometric and geomechanical properties of foundation - road body – roadway and surface and deep water table levels, in order to identify risk scenarios. The numerical analysis has been carried out by a finite element calculation code taking into account different combinations of water level depth and embankment height for different lithological and geotechnical properties of the foundation soils. The obtained results show that there are some critical combinations of the above parameters that can cause the rise of the water level well above the ground surface not only at the road embankment but also in the surrounding areas up to tens of meters from the road.
Observations on the pseudostatic analysis of embankments and slopes with arbitrary seismic force inclination
Engineering Geology, 1987
ABSTRACT A simple method for evaluating the seismic stability of embankments and slopes has been ... more ABSTRACT A simple method for evaluating the seismic stability of embankments and slopes has been developed by modifying the generalized procedure of slices proposed by Janbu. A pseudostatic analysis is carried out. The seismic force is represented through its horizontal and vertical components, acting on the centre of gravity of the soil mass. Defining a nominal state of plastic equilibrium, the safety factor of the slope for a given value of the seismic force is obtained through an iterative procedure that converges very rapidly. Moreover, by assuming a seismic force of intensity varying from zero value (static condition) up to a limit value, depending on the seismicity of the area, one can obtain the “influence lines” of the horizontal and vertical acceleration. Finally, a directional parametric analysis has been carried out considering a seismic force of a given intensity, acting in a direction varying from 0° to 360° with respect to the vertical axis through the gravity centre of the slope. By means of this procedure it is possible to locate a “critical zone” for the slope, i.e., that one within which any seismic force can cause the failure of the slope. Moreover, it appears that it is incorrect to consider only the horizontal acceleration in the stability analyses of slopes under earthquake loading conditions, as the most dangerous direction is usually different from the horizontal one.
The aim of this research is to identify fast and low-cost "Change Detection" techniques. This req... more The aim of this research is to identify fast and low-cost "Change Detection" techniques. This requirement stems from the need to operate in an efficient and timely manner, especially in case of natural disaster and battle against building abusiveness and, on the other hand, to environment monitoring: coastal erosion, subsidence phenomena, misuse of quarries, deforestation and desertification, etc. In this regard, this survey aims to assess the possibility of using DTM constructed by satellite images rather than DTM extracted through other techniques such as LIDAR and aerial photogrammetry. The results are very interesting and confirm the hypothesis: it is therefore possible to investigate territory in a more quickly and effective way. We have chosen, in line with the targets set, to focus the analysis on geographical areas particularly affected by environmental and anthropic criticalities, territorial morphological changes, building abusiveness, etc. The first study is located on an area near Fasano (BR) -Italy, that is a part of the Alta Murgia National Park. The second one is located in a mountainous area in the Basilicata, Italian region particularly affected by episodes of territorial transformation for both natural and anthropic causes.
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Papers by Rosamaria Trizzino