GEOMORPHOLOGICAL MAPPING FOR LANDSLIDE HAZARD ASSESSMENT IN THE DOLOMITES (ITALY)

M. Panizza, A. Corsini, M. Gandolfi, M. Marchetti and M. Soldati
Dipartimento di Scienze della Terra, Università degli Studi di Modena
Largo S. Eufemia 19 - 41100 Modena, Italy

The authors describe the mapping methodology adopted for landslide hazard assessment within the framework of the Newtech Project, funded by the Environment and Climate Programme of the European Union. The work is carried out in three phases. The first phase consists of a geomorphological analysis of the study area that allows a standard geomorphological map on a 1:25.000 to 1:10.000 scale (1) to be laid out. The data obtained can be implemented into a GIS. The second phase consists of a slope instability analysis which is divided in two parts. One part is a geomorphological map applied to slope instability analysis on a 1:5000 scale (2a) which derives from the standard geomorphological map throughout the identification and the further characterisation of unstable areas of different degree of activity. The other part is a document containing geotechnical and geomechanical data (2b) that permits the causes and the evolution of landslides to be better understood and characterised. The data obtained can be implemented into a GIS. The third phase consists of a landslide hazard map containing two basic elements: landslide phenomena (3a) and landslide prediction (3b). The first element is obtained from map 2a throughout data processing and selection for landslide purposes: it depicts the spatial and the temporal distribution of landslides in the study area, thus the effects of slope instability. The second element is obtained throughout the identification of the causes of each type of landslides and by means of comparisons and analysis based on statistical models supported by a GIS; it depicts land subdivision in stable and unstable areas. The poster illustrates the various phases of the methodology with particular reference to the area of Corvara in Badia (Dolomites).