From landslide characterization to nature reserve management: The “Scialimata Grande di Torre Alfina” landslide Geosite (Central Apennines, Italy)
Articolo
Data di Pubblicazione:
2023
Citazione:
From landslide characterization to nature reserve management: The “Scialimata Grande di Torre Alfina” landslide Geosite (Central Apennines, Italy) / G. Tronti, F. Vergari, I.M. Bollati, F. Belisario, M. Del Monte, M. Pelfini, P. Fredi. - In: JOURNAL OF MOUNTAIN SCIENCE. - ISSN 1672-6316. - 20:3(2023), pp. 585-606. [10.1007/s11629-022-7596-y]
Abstract:
Italy is characterized by widespread
geomorphological instability, among which landslides
leave impressive marks on the landscape. Nevertheless,
landslide bodies may represent key sites for thematic
and educational itineraries, especially in protected
areas, where their management becomes an important
issue. Our study focuses on the "Monte Rufeno Nature
Reserve" (Central Apennines, Italy), where iconic
landslides are present. Here, the "Scialimata Grande di
Torre Alfina" landslide (SGTA) is listed in the regional
Geosite database. This work aims to propose a
multiscale procedure for landslide analysis, in terms of
both hazard sources but also educational and
geoheritage enhancement opportunities in natural
reserves. After performing a Landslide Susceptibility
conditional Analysis (LSA) for the reserve territory,
attention was focused on the SGTA, to define properly
its features and morphodynamics. A multi-disciplinary
approach was adopted, by applying both remote
sensing (UAV structure from motion,
Photointerpretation) and field survey
(geomorphological and GPS monitoring). From the
LSA, based on drainage density, curvature, and slope
triggering factors, the road and trail susceptibility
maps were derived, as base tools for future risk
assessments and trail paths management within the
reserve. At the SGTA scale, the monitoring showed a
displacement of up to 23 m during the time interval
between 2015 and 2018. The landslide dynamics seem
to be driven by alternating dry and extremely wet
periods; moreover, leaks from the aqueduct in the
detachment area and piping effects through clays may
have also decreased the substrate cohesion. The SGTA
complex influence on the Paglia River valley geometry
was also hypothesized, underlining the action of
landslide through different spatial scales (on-site and off-site) and on different environment features
(sediment connectivity, hydrology). Finally, the SGTA
appears highly representative of the geomorphic
dynamics within the Nature Reserve (i.e., scientific
value) and it could be classified as an active geosite.
Since the site was featured by a tourist trail, adequate
management strategies must be adopted, considering
the educational value and safety issues.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Landslides; Geoheritage; Geosites; Nature reserves management; UAV structure from motion; Landslides conditional analyses
Elenco autori:
G. Tronti, F. Vergari, I.M. Bollati, F. Belisario, M. Del Monte, M. Pelfini, P. Fredi
Link alla scheda completa: