Slope angles are a key parameter in estimating susceptibility to developing earth flows. In this paper, slope angles are used to estimate potential unstable areas in a pilot sector of the Benevento province in (Southern Italy). Since the study area is characterized by a complex lithological setting, landslide distribution was analyzed within four-groups of homogeneous litho-technical sequences. Slope angle frequency distributions were obtained from a landslide sample in accordance with the Weibull probability density distribution function. Their analysis shows that the largest occurrence of landslides fall within an interval of slope angles ranging from 9 to 14. As filed surveys confirm, the low frequency of instabilities on steeper slopes can be explained by a deficit of potentially involving materials, partially due to the presence of stony sequences. Consequently, the probability of failure was calculated only on slope angle ranges already affected by existing landslide phenomena. © Springer-Verlag Berlin Heidelberg 2013.
Slope angle as indicator parameter of landslide susceptibility in a geologically complex area / Donnarumma, A.; Revellino, P.; Grelle, G.; Guadagno, F. M.. - 1:(2013), pp. 425-433. (Intervento presentato al convegno 2nd World Landslide Forum, WLF 2011 tenutosi a Rome; Italy) [10.1007/978-3-642-31325-7-56].
Slope angle as indicator parameter of landslide susceptibility in a geologically complex area
Grelle G.;
2013
Abstract
Slope angles are a key parameter in estimating susceptibility to developing earth flows. In this paper, slope angles are used to estimate potential unstable areas in a pilot sector of the Benevento province in (Southern Italy). Since the study area is characterized by a complex lithological setting, landslide distribution was analyzed within four-groups of homogeneous litho-technical sequences. Slope angle frequency distributions were obtained from a landslide sample in accordance with the Weibull probability density distribution function. Their analysis shows that the largest occurrence of landslides fall within an interval of slope angles ranging from 9 to 14. As filed surveys confirm, the low frequency of instabilities on steeper slopes can be explained by a deficit of potentially involving materials, partially due to the presence of stony sequences. Consequently, the probability of failure was calculated only on slope angle ranges already affected by existing landslide phenomena. © Springer-Verlag Berlin Heidelberg 2013.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
