M. Amanti, P. Cara, R. Ventura (PCM - DSTN - Italian Geological Survey, Via Curtatone 3, 00185 Rome, Italy)

M. Pecci (ISPESL - Productive Plants and Environmental Interaction Department, Via Urbana 167, 00184 Rome, Italy)

Italian Geological Survey, in co-operation with ISPESL-DIPIA, is testing a methodology to produce landslide hazard maps and to evaluate natural risks in productive areas. The Serchio pilot project (183/89 Italian law) started in 1993; data collecting, digitising, analysing and processing have been partially performed till now, with the presentation of several case studies, related to particular areas and phenomena. Automatic procedures using multivariate and probabilistic analysis in GIS environment have been performed after data validation and control: the results on a small test area are presented in this paper. The further and final step is the transfer of used and tested methodology to the whole studied Serchio river basin, aimed at the definition of "official rules" to produce the Italian landslide hazard map at a scale 1:50,000.