1,721,007 research outputs found
Utilizzazione dei dati rilevati secondo standard CARG per la valutazione della stabilità dei versanti.
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Utilizzazione di geodatabase a standard CARG per la valutazione della pericolosità da frana nell’area di Pergola (Marche, Italia).
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Three-dimensional reconstruction of a poly-deformed geological structure: a portion of the Carrara Syncline (Apuane Alps, Italy)
No full textThis paper presents an approach to reconstruct geological structures in three dimensions using and honouring field survey geological data. The methodology was developed to reconstruct the poly-deformed Carrara Syncline (Apuane Alps, Italy) in order to better understand the relationships regarding the structural geology of the area and the hydrogeological fluxes. In the first step, all the geological data (observed, measured and interpreted) of the study area were organized in a database using a geographical information system. The standard tools of a computer-aided design (CAD) environment were used to build geological profiles using the observed data (outcropping contact lines) extracted from the database, as well as, to create the contact surfaces via interpolation using non-uniformal rational B-spline surfaces. The intersection lines between each of these surfaces and the digital elevation model yield the model contact lines (MCLs). Discrepancies between the MCLs and the corresponding outcropping contact lines were analysed to further constrain the surfaces of the model. Starting from these surfaces, a voxel-based solid model was built, for storing and displaying each rock formation. © 2007 Elsevier Ltd. All rights reserved
Lidar survey, aerial photos and Quick Bird satellite images for the palaeodrainage reconstruction of Serchio river (Lucca, Italy) [Ricostruzione del paleoalveo del Fiume Serchio (Lucca, Italia) tramite rilievi LIDAR, foto aeree ed immagini Quick Bird]
No full textIn this work the palaeodrainage reconstruction of Serchio River has been performed, starting from present and historical geomorphological evidences. For this, aerial photos, orthophotos, Quick Bird satellite imageries, integrated with historical references have been utilized.
The orthorectification of all the imageries have been performed by utilizing a DEM (Digital Elevation Model) resulting from the elaboration of numeric topography at a scale of 1:10,000, topographic surveys (DGPS and levelling), and LIDAR aerial survey done in February and March 2005.
By the remote sensing data interpretation, the palaeodrainage channels of Serchio River have been reconstructed at a large scale for the whole area of Lucca plain. Through a GIS the whole dataset have been managed as geo-database, in order to highlight the spatial and temporal variations of palaeodrainage of Serchio River, producing thematic cartography.
LIDAR survey allowed us to generate a DDTM, 1m of spatial resolution, which has been utilized for three-dimensional elaborations, carried out in order to highlight the lowered areas in the Lucca plain, which correspond to the palaeodrainage of Serchio River
Interdisciplinary approach for geomorphological study of an high slope instability area in the northern Apennines mountains
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Monitoring the evolution of the Candela Landslide (Apulia, Southern Italy) using remote sensed data
Full text linkMonitoraggio della frana di Corniglio (Parma) prima e dopo il terremoto di magnitudo M=5.4 del Dicembre 2008
No full textIn this work we present the results of a recent monitoring of a large landslide by means of integration of several techniques. The site is the Corniglio landslide (CL). We integrate traditional geomorphologic and geological surveys, digital photogrammetry, GPS monitoring and geostatistics, to propose a new kinematic framework for the CL as Deep-Seated Slope Gravitational Deformation (DSGSD). Surveys were carried out in six periods, in July and September 2006, March and August 2007, July 2008 (after a M=4 earthquake in 28 December 2007, 10 km far from Corniglio), and finally January 2009 (after several earthquakes in the last days of December 2008 with magnitude variable from 4 to 5.4, and with epicentres located less than 30 km far from Corniglio). Survey results, photogeologic interpretation of multitemporal orthophotographs, related to 1976, 1988, 1994, 1996, 1998, 2005, and satellite imagery related to 2003 were integrated for analysing the state of activity of landslide from 1976 to 2009, quantifying the superficial displacement vectors. Moreover, a GPS survey by RTK mode was periodically performed to locate the actual crown of the main scarp and to identify movements of the CL after the earthquakes of the end of December 2008. The relevant east-west trending lineaments seem to be involved into slope movements. These evidences suggests that the CL may be part of a larger DSGSD also including the hill among the Bratica river, the CL main body and the Parma river, and it is subjected to the important earthquakes involving this area, which periodically reactivate the main body of landslide
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