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Download Dynamics of Rockslides and Rockfalls by Prof. Dr. Theodor H. Erismann, Prof. Dr. Gerhard Abele PDF

By Prof. Dr. Theodor H. Erismann, Prof. Dr. Gerhard Abele (auth.)

Mass circulate of rocks in excessive mountains can seriously injure the inhabitants and harm man-made constructions in those parts. This booklet makes a speciality of the certainty of the mechanisms of rockslides and rockfalls utilizing a quantitative procedure. the variety and speed of those dangers are calculated to function a foundation for evacuations and different preventive measures. Examples from 4 continents illustrate the need of this type of details. The publication includes a wealth of knowledge for practitioners and scientists operating within the box of disaster prevention.

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Extra info for Dynamics of Rockslides and Rockfalls

Sample text

Numbers represent elevations in metres. The tongue moving up Domleschg Valley is shown twice to account for the possibilities proposed (refer to text) (sketch by Erismann) into the frame of Fig. 5, is not necessarily identical to that of the other examples. For this reason the Blackhawk is excluded from the calculation of regression curves (Sect. 3). In considering Fig. 6 it becomes plausible that Nicoletti and Sorriso Valvo (1991) attribute a particular importance to the geometry of a moving disintegrated mass.

Photograph taken from run-up debris barring Oetztal Valley at a distance of about 6 km from the scar (above figure "720" in sketch of Fig. 6). 9) cannot be far from reality. On the other hand, as the energy lost owing to a partial source of dissipation necessarily is smaller than the total loss of energy (expressed by the apparent coefficient of friction), even repeated bobsleigh run like curves in a valley with efficient channelling qualities cannot be considered as an important energy dissipating mechanism (for details s.

Map and longitudinal section. Scales for map and section are equal. 3). 8 (not perceptible in section). 2 during acceleration (sketch by Erismann, based on Shreve 1968) Fig. 14. Compression problem in air lubrication. Rockslide mass crossing a "jumping hill". a Leading end landing; b bulk of mass airborne; c trailing end taking off. 2 m s- 1 (250ft s- 1) as proposed by Shreve is a substantial overestimate. In spite of such incontrovertible evidence for the impossibility of trapping and compressing air in large quantities, the considerations following hereafter are made as if, by some unrecognised mechanism, a sufficient volume of compressed air were available below the debris.

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