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| Titel |
Comparison between qualitative rockfall risk rating systems for a road affected by high traffic intensity |
| VerfasserIn |
P. Budetta, M. Nappi |
| 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 ; 13, no. 6 ; Nr. 13, no. 6 (2013-06-22), S.1643-1653 |
| Datensatznummer |
250018506
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| Publikation (Nr.) |
 copernicus.org/nhess-13-1643-2013.pdf |
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| Zusammenfassung |
| The paper deals with the assessment of the rockfall risk for a road stretch,
in southern Italy, affected by high traffic intensity. Three qualitative
rockfall risk rating systems (QRSs) which use an exponential scoring with a
base of 3 were employed, and then the results were compared. The used methods
are the following: the Rockfall Hazard Rating System, a modified version of
this method already proposed in the past by one of the authors, and the
modified version of the Colorado Rockfall Hazard Rating System. The studied
road stretch is about 11 km in length and is part of a very tortuous
road flanked by rock slopes characterised by complex geostructural and
geomechanical layouts. The road was subdivided into 56 sections, defined so
as to have – as much as possible – homogeneous geological characteristics.
By means of the three QRSs, it was possible to ascertain that high levels of
rockfall risks are due to the lack of ditches, a very limited percentage of
decision sight distance (PDSD) values and a small roadway width, whereas a
subordinate factor is the hazard caused by rockfalls. Several positive and
negative aspects arising from the use of the employed methods are
highlighted and discussed. |
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