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GIS-Based Rockfall Susceptibility Zoning in Greece

Department of Geotechnical Engineering, School of Civil Engineering, National Technical University of Athens, 15773 Athens, Greece
Geosciences 2019, 9(4), 163;
Received: 19 February 2019 / Revised: 31 March 2019 / Accepted: 2 April 2019 / Published: 8 April 2019
(This article belongs to the Section Natural Hazards)
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The assessment of rockfall risks on human activities and infrastructure is of great importance. Rock falls pose a significant risk to (a) transportation infrastructure, (b) inhabited areas, and (c) Cultural Heritage sites. The paper presents a method to assess rockfall susceptibility at national scale in Greece, using a simple rating approach and Geographic Information Systems (GIS) techniques. An extensive inventory of rockfalls for the entire country was compiled for the period between 1935 and 2019. The rockfall events that were recorded are those which have mainly occurred as distinct rockfall episodes in natural slopes and have impacted human activities, such as roads, inhabited areas, and archaeological sites. Through a detailed analysis of the recorded data, it was possible to define the factors which determine the occurrence of rockfalls. Based on this analysis, the susceptibility zoning against rockfalls at the national scale was prepared, using a simple rating approach and GIS techniques. The rockfall susceptibility zoning takes into account the following parameters: (a) the slope gradient, (b) the lithology, (c) the annual rainfall intensity, (d) the earthquake intensity, and (e) the active fault presence. Emphasis was given on the study of the earthquake effect as a triggering mechanism of rockfalls. Finally, the temporal and spatial frequency of the recorded events and the impact of rockfalls on infrastructure assets and human activities in Greece were evaluated. View Full-Text
Keywords: rockfall; susceptibility; GIS; rainfall; earthquake; fault; inventory rockfall; susceptibility; GIS; rainfall; earthquake; fault; inventory

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Saroglou, C. GIS-Based Rockfall Susceptibility Zoning in Greece. Geosciences 2019, 9, 163.

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