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| Titel |
Landslide hazard zonation of slopes susceptible to rock falls and topples |
| VerfasserIn |
M. Parise |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 2, no. 1/2 ; Nr. 2, no. 1/2, S.37-49 |
| Datensatznummer |
250000264
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| Publikation (Nr.) |
 copernicus.org/nhess-2-37-2002.pdf |
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| Zusammenfassung |
| A landslide hazard
zonation is a division of the land surface into areas, and the relative
ranking of these areas according to degrees of actual or potential hazard
from landslides on slopes. Zonation from scientific research does not
generally imply legal restrictions, but can be useful to those people who
are charged with the land management, by providing them with information
that is indispensable for planning and regulation purposes. This paper
presents a zonation of rock slopes in carbonate mountains on the boundary
to the east of the valley of the Sele River (Campania, southern Apennines
of Italy). The mountains are severely affected by rock falls and topples,
and the related hazard is, therefore, very high; the presence of inhabited
areas (the towns of Valva, Colliano and Collianello) and other human
infrastructures at the slope foothills make these phenomena extremely
dangerous to the anthropogenic environment. The area is highly seismic, as
experienced on the occasion of several moderate to strong earthquakes that
have hit this sector of the Apennines. According to the zonation proposed
here, the ridge of Mount Valva and Mount Marzano is subdivided into four
main areas on the basis of the processes which take place in the different
sectors of the mountains: the source area, the talus slope, the rockfall
shadow (where scattered outlying boulders are present), and the safe area
(outside of the reach of fallen blocks). The four sectors were identified
through air-photo interpretation and detailed field surveys, aimed in
particular at characterizing and interpreting the main rock mass joint
patterns, and their relative orientation with respect to the local slope
direction. Geological, morphological and structural analyses permitted one
to evaluate and classify those parts of the slope that are more
susceptible to detachment of rocks, and to identify the more diffuse types
of failure. Due to high seismicity of the study area, particular attention
was given to the evaluation of the seismic susceptibility to rock falls,
by applying two methods recently proposed in literature. Results from this
phase of the study were then integrated by additional information from
historical research on slope movements occurred previously in the area.
The landslide hazard zonation, shown on large-scale cartography, could be
compared to maps depicting the distribution and typology of the
anthropogenic activities, and thus constitutes a useful tool for
administrators and planners, in order to evaluate the hazards related to
slope movements, and the vulnerability of settlements, roads, and other
man-made infrastructures. |
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