REMOTE-SENSING TECHNIQUES FOR LANDSLIDE STUDIES AND HAZARD ZONATION IN EUROPE

An inventory is presented of researches concerning the use of remote s ensing for landslide studies and hazard zonation as mainly carried out in the countries belonging to the European Community. An overview is given of the applicability of remote sensing in the following phases o f landslide studies: (1) Detection and classification of landslides. S pecial emphasis is given to the types of imagery required at different scales of analysis. (2) Monitoring the activity of existing landslide s using G.P.S., photogrammetrical techniques and radar interferometry. (3) Analysis and prediction in space and time of slope failures. The different factors required in a landslide hazard study are evaluated, and the optimum remote sensing imagery for obtaining each of these fac tors is indicated. Examples are given of research work carried out in these three phases from EC countries. Finally an evaluation is given o f the aspects of uncertainty associated with the use of remote sensing data, and conclusions are given as to the incorporation of remote sen sing techniques within the overall framework of techniques.