Morphometric and landsliding analyses in chain domain: the Roccella basin,NE Sicily,Italy |
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Authors: | Francesco Rapisarda |
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Institution: | (1) ENEA, National Agency for New Technologies Energy and Environment, s.s. Jonica, km 419+500, 75026 Rotondella (MT), Italy |
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Abstract: | The dynamic interaction of endogenic and exogenic processes in active geodynamic context leads to the deterioration of the
physico-mechanical characteristics of the rocks, inducing slopes instability. In such context, the morphometric parameters
and the analysis of landslide distribution contribute to appraise the evolutive state of hydrographic basins. The aim of the
study is the morphometric characterization of the Roccella Torrent basin (Rtb) located in South Italy. Landsliding and tectonic
structure dynamically interact with the drainage pattern that records these effects and permits the definition of the evolutive
geomorphic stage of the basin. The Air Photograph Investigation and field surveys permitted to draw the main geomorphic features,
the drainage pattern of the Rtb, to calculate the morphometric parameters and to delimit the landslides’ bodies. Detailed
analysis about the landslide distribution within a test site 17 km2 wide were carried out to elaborate indicative indexes of the landslides type and to single out the lithotypes that are more
involved in slope instability phenomena. The morphometric parameters indicate the rejuvenation state within the Rtb where
the stream reaches show the effects of increased energy relief in agreement with the geological settings of this sector of
the Apennine–Maghrebian Chain. |
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