A. Belloni, F. Milani, N. Padovan, M. Presbitero (Regione Lombardia, Milano, Italy)

F. Luino (CNR-IRPI, Torino, Italy)

The floods occurred in these years in Italy have emphasized the susceptibility of many urban areas towards river dynamic procesess. In order to provide flood risk mapping (scale 1:10,000 or 1:5,000) of the built-up areas and specific directions for urban planning, the Geological Survey of the Lombardia Region has started up a pilot study focused on the High valley of the Oglio River. The work has taken into consideration the following aspects:

1. definition of the river corridors, based on morphological, hydrogeological and hydraulic characteristics of the basin;
2. careful research of historical events, usually stored from the different Local Public Offices in order to map flooded areas and highwater levels;
3. the evaluation of the principal man-made structures in the areas and of the water discharge and sediment load for all the tributary rivers and streams