C. Terranova

Geomorphological map of the Somma-Vesuvius volcanic complex (Italy)

Abstract Please click here to download the map associated with this article. The first geomorphological map of the Somma-Vesuvius active volcano is presented. This map includes the volcanic and epivolcanic landforms at a 1:10.000 scale. The map is obtained combining the available geological information with data derived from: (a) Digital Terrain Model (DTM), (b) image analysis of aerial views and interpretation of topographic maps, (c) field surveys. At Somma-Vesuvius, epivolcanic landforms concentrated in the northern and eastern sectors of the volcano. Volcanic landforms characterize the caldera area, the western and the southern sectors, where the most recent (1631–1944) activity occurred.

Morphometry of the Campi Flegrei caldera (Southern Italy)

A high-resolution Digital Terrain Model (DTM) of Campi Flegrei caldera, obtained from an airborne LiDAR mission, has been analyzed in order to produce a 1:20,000-scale morphometric map of this volcanic area. The map consists of different thematic layers, which include: profile curvature, terrain ruggedness index, elevation range, as well as an up-to-date structural map and building distribution in the densely populated area. Results evidence that most of the relief is related to the occurrence of tuff-cones, tuff-ring, and the outer flanks of the caldera. Higher values of elevation characterize the upper portions of cones, while higher terrain ruggedness index values concentrate on the inner flanks of cones and in areas affected by gravity and erosional processes. The map also evidences the topographic expression of crater rims and of the major morphological scarps, which reflect ancient and uplifted shorelines and present-day cliffs.

Measuring non-linear deformation of the Campi Flegrei caldera (Naples, Italy) using a multi-method insar-geophysical approach

Geodetic monitoring of Campi Flegrei caldera, west of Naples (Italy), has been historically carried out through ground-based networks and integrated at the end of the nineties with space-borne InSAR techniques, exploiting the C-band sensors onboard ERS1-2 and ENVISAT satellites. In the last years C-band monitoring has been complemented by high-resolution X-band (TerraSAR-X) investigations, in order to point out also small deformations which are typical in the area. The uplift event starting in 2011 was strong enough to be detected by both ENVISAT and TerraSAR-X observations and confirmed by classical geodetic techniques. Besides the integration of geodetical and geochemical data with the InSAR results, we also include the outcomes of the InfraRed (IR) thermal camera located at Pisciarelli site, in order to get also a very local information.

4D Monitoring of Active Landslides by Multi-Temporal Airborne LiDAR Data

We present results of a multi-temporal analysis of airborne LiDAR data collected between 2006 and 2010 on the 3 km long active Montaguto landslide (Italy). Digital Terrain Models are constructed from data acquired on May 2006, July 2009, April 2010 and June 2010. The spatial distribution of selected morphometric parameters and the statistical analysis of the temporal variations of such parameters allow us to reconstruct the evolution of the landslide. We recognize zones of uplift and subsidence, estimate the volumes of removed or accumulated material, and determine the average rate of vertical and horizontal displacement. We also map the deformations structures and provide new insights on the sliding mechanisms. Zones in which the topographic features change due to handling/removal work are also analyzed. The approach proposed here provides new insight on the use of airborne LiDAR in the surveillance strategies of landslides and other gravity-controlled processes.