Geological surveying in a Metropolitan area: the southern suburbs of Roma

The southern suburbs of Rome were built up for the most part during the second half of the last century. This contribution illustrates the case study of the Ostiense area, located across the Tiber River valley, where the cyty?s expansion has mostly not taken into account the geological and hydrogeological characteristic of the land. For this reason, many buildings and infrastructures of ther area have been damaged by differential dubsidence and flooding. This work proposes a hazard zonation based on the geotechnical, hydrogeological, hydraulic and seismic characteristics of the area, for the purposes of urban development planning and management.