1,721,122 research outputs found
Bibliography concerning deepseated gravitational deformations
No full textBibliography concerning Deepseated Gravitational Deformations - II Quaternario, 3(2), 1989, pp. 131-140 - The aim of the present paper is to give information about the researches which have been carried out on deep-seated gravitational deformations all over the world. For his reason a list of publications (written in Italian, English, French and German) regarding the above mentioned phenomena is here presented. The authors show the existence of different scientific schools characterized by different approaches in the study of this subject. Moreover the evolution of theories and ideas with respect to the interpretation of the phenomena is given
Lateral spreading.
No full textThe main conceptual and terminological issues related to lateral spreading are presented and accompanied by a brief outline of the state-of-the-art on the topic. Then the geomorphic features related to the two main types of spreading (rock spreading and soil spreading) are illustrated, with reference to the geological conditions in which they take place, as well as to their causes and evolution. Finally, some considerations on the hazard and planning implications are provided
Some cases of deep-seated gravitational deformations in the area of Cortina d'Ampezzo (Dolomites). Implications in environmental risk assessment
No full textThe Authors, after having analyzed the main geomorphological and structural fractures characterizing dee-seated gravitational deformations and presented some terminological problems, describe four cases of deep-seated gravitational deformations in the area of Cortina d'Ampezzo (Dolomites). Moreover the relationships between these phenomena, which often deem to favour the development of "collateral" slope movements and landscape aspects, like Cortina d'Ampezzo, are examined
The role of research institutions in emergency management: the case hystory of a dangerous landslide in the eastern Italian Alps.
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Recent landslide studies in the eastern dolomites (Italian Alps) for hazard assessment and mitigation.
No full textJournal of Nepal Geological Societ
Bergzerreißung and Talzuschub
No full textThe terms Bergzerreißung (mountain splitting) and Talzuschub (closing-up of the valley) describe the morphological features of large down-hill movements. Their structural peculiarities are determined by a zone of internal rotation beneath a zone of only small internal deformation. From these data we can deduce a general plan of deformation of slopes. When assuming a linear distribution of shear stress they also allow the determination of the mechanical properties of rock masses. Comparing rock and ice in general we may conclude that these mechanical properties, mainly the flow law expressed by a power function, are valid also in deep parts of the earth crust
Data collection aiming at the definition of fucture hazard scenariuos of the Tessina Landslide.
No full textGeological and geomorphological features of landslides affecting the area of Cortina d'Ampezzo (Dolomites, Italy)
No full textThe paper shows the results of geological and geomorphological investigations recently carried out in the area of Cortina d'Ampezzo (Dolomites, Northern Italy). The study is part of European research projects aiming at the recognition and characterisation of mass movements. The stratigraphical and structural conditions of the study area greatly influenced slope evolution after the retreat of glaciers, favouring the development of large gravitational processes. The geological structure of the area is, in fact, characterised on the one hand by a repeated succession of pelitic rocks and dolomites and on the other hand by the wide presence of pelitic terms (even if largely covered by superficial deposits) in the lower part of the basin. Landslide deposits, which form most of the outcropping Quaternary deposits, have been grouped into "landslide units", in order to make easier the understanding of the complex slope evolution occurred since the Late-glacial period. A "landslide unit" has been defined in this paper as the association of landslide accumulations strictly connected in space and time: it can consist of a single main landslide and successive reactivations or of a superimposition of accumulations caused by repeated activations of a main scarp. The characteristics and distinctive aspects of landslide units are given. Several landslides have been radiocarbon dated. Age and borehole data contributed substantially to the reconstruction of the geomorphological evolution of the area. In particular, they have shown a number of landslides distributed in two main periods. The first ranges between 10,000 and 8,000 years B.P. when, after the retreat of the glaciers, rock walls no longer sustained by the ice masses became prone to landsliding, giving rise to several large-scale mass movements. These consist of rock slides and rock avalanches of considerable size detached from the steep rock walls surrounding Cortina d'Ampezzo. These events have left clear morphological evidence in the landscape, because of their magnitude and the characteristics of the rock masses involved (dolomites). The second period ranges between 5,000 and 4,000 years B.P. when smaller and slower landslides took place generally affecting the pelitic rocks of the lower part of the slopes. The concentration of landslides in this period is likely to be connected to the wetter climatic phase which occurred during the Upper Atlantic which made the slopes more prone to landsliding. At present the area of Cortina d'Ampezzo is still affected by active landslides which, owing to their potential risk for human activities, are monitored by means of automatic surveying systems
On the Use of Optical Fiber Sensors for Debris Flow Monitoring: A Review of Recent Achievements
No full textDebris flows are among the most common and dangerous types of landslides on the planet, often occurring in mountainous areas. Because of their tremendous speeds and the sheer destructive power of their flow, they are extremely hazardous to life and property. Geotechnical instrumentation is critical for monitoring and warning debris flows. However, traditional monitoring systems are hampered by limitations, such as limited spatial resolution and sensitivity, reduced robustness, and powering and cabling issues. These limitations can be surpassed using optical fiber sensors, which are gaining increasing interest by the scientific and stakeholders community. In this paper, we have selected and review some of the most significant achievements and trends on this topic
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