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Nat. Hazards Earth Syst. Sci., 15, 1963-1972, 2015
https://doi.org/10.5194/nhess-15-1963-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
08 Sep 2015
Landscape analysis for multi-hazard prevention in Orco and Soana valleys, Northwest Italy
L. Turconi1, D. Tropeano1, G. Savio2, S. K. De3, and P. J. Mason4 1Consiglio Nazionale delle Ricerche, Istituto per la Protezione Idrogeologica, CNR-IRPI UOS Torino, Strada delle Cacce 73, 10135 Turin, Italy
2CNR-IRPI UOS Torino, Strada delle Cacce 73, 10135 Turin, Italy
3Department of Geography, North-Eastern Hill University, NEHU Campus, Shillong, 793022, Meghalaya, India
4Imperial College, Department of Earth Science and Engineering, London, Department of Earth Science & Engineering – Royal School of Mines, Imperial College, Prince Consort Road, London, SW7 2AZ, UK
Abstract. The study area (600 km2), consisting of Orco and Soana valleys in the Western Italian Alps, experienced different types of natural hazards, typical of the whole Alpine environment. Some of the authors have been requested to draw a civil protection plan for such mountainous regions. This offered the special opportunity (1) to draw a lot of unpublished historical data, dating back several centuries mostly concerning natural hazard processes and related damages, (2) to develop original detailed geo-morphological studies in a region still poorly known, (3) to prepare detailed thematic maps illustrating landscape components related to natural conditions and hazards, (4) to thoroughly check present-day situations in the area compared to the effects of past events and (5) to find adequate natural hazard scenarios for all sites exposed to risk. The method of work has been essentially to compare archival findings with field evidence in order to assess natural hazard processes, their occurrence and magnitude, and to arrange all such elements in a database for GIS-supported thematic maps. Several types of natural hazards, such as landslides, rockfalls, debris flows, stream floods and snow avalanches cause huge damage to lives and properties (housings, roads, tourist sites). We aim to obtain newly acquired knowledge in this large, still poorly understood area as well as develop easy-to-interpret products such as natural risk maps.

Citation: Turconi, L., Tropeano, D., Savio, G., De, S. K., and Mason, P. J.: Landscape analysis for multi-hazard prevention in Orco and Soana valleys, Northwest Italy, Nat. Hazards Earth Syst. Sci., 15, 1963-1972, https://doi.org/10.5194/nhess-15-1963-2015, 2015.
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Short summary
Due to the severe hazardous processes many lives have been lost in the area: at least 250 deaths have been recorded since the 18th century, accounting for 36 different dates/events. Many research topics remain to be developed, especially those concerning (a) the time period during which natural events of a given intensity may recur, and (b) the improvement of techniques and knowledge, at the highest possible detail and in relation to anthropogenic activities.
Due to the severe hazardous processes many lives have been lost in the area: at least 250 deaths...
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