Abstract
ABSTRACTThis work presents the first results of an integrated geomorphological analysis of a large earthflow in Montebello sul Sangro (Abruzzo, Central Italy). The study is based on a multitemporal geomorphological investigation supported by the morphometric analysis of the drainage network and numerical landslide modelling. The multitemporal geomorphological investigation, based on the interpretation of aerial photos, LiDAR data and field geomorphological mapping, outlined the recent geomorphological history and multiple activation phases of the landslides. A 2D Finite Difference Method (FLAC, Fast Lagrangian Analysis of Continua) analysis of the main landslide scarp, affecting the village of Montebello sul Sangro (Italy), was performed. Finally, in order to outline the morphometric features of the landslide area, local slope autocorrelation was used as a morphometric index. The analysis was aimed at studying the evolution of the active current landslide and specifically the possible retreat of the main scarp.
Highlights
An integrated geomorphological analysis of a large earthflow in Montebello sul Sangro (Abruzzo, Central Italy) is currently in progress
From recent evolution it is possible to outline possible future landslide scenarios and to contribute to hazard assessment. This investigation is based on the interpretation of 1954, 1975, and 2009 aerial photos provided by the Abruzzo Region, the analysis of LiDAR data acquired in January 2014 for this project, and on a field geomorphological survey carried out after the LiDAR acquisition, in spring 2014
The geomorphological evolution of the western side of the relief is influenced by rock falls in the upper part of the ridge, due to fractures and jointing in the calcareous strata, while in the lower part it is influenced by the progressive involvement of the clay units in the landslide movement
Summary
An integrated geomorphological analysis of a large earthflow in Montebello sul Sangro (Abruzzo, Central Italy) is currently in progress. The numerical discretization of the actual physical domain is performed by mesh tessellation or a mesh-less approach such as, for example, smoothed particle hydrodynamics (Monaghan, 2005) which is effective at simulating floods and earthflows (Audisio, Pasculli, & Sciarra, 2015; Minatti & Pasculli, 2010, 2011; Pasculli & Audisio, 2015; Pasculli, Minatti, Audisio, & Sciarra, 2014; Pasculli, Minatti, Sciarra, & Paris, 2013) This integrated analysis allowed for a comprehensive description of the geomorphological features of the large earthflow–complex landslide of Montebello sul Sangro, the definition of the recent geomorphological evolution, and the outlining of possible future scenarios, applying computer codes
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