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LANDSLIDES IN THE MAIN URBAN AREAS OF THE GRANADA PROVINCE, ANDALUCIA, SPAIN (2006)
Landslide incidence in urban areas of the city of Granada, and the main towns of the province with more than 20 000 inhabitants, is here analysed following a methodology based on the following steps: collection of information about historical or antecedent events; compilation of a landslide inventory from field and aerial photography surveys; GIS (ArcGIS, ESRI) implementation using a DEM and detailed thematic maps; and analysis of landslide determinant factors. Finally, landslide susceptibility maps were derived for quadrangles around the towns of Granada, Motril, Almuñécar, Loja, Montefrío, Santafé, Ugíjar, Órgiva, Guadix and Baza. The maps were prepared for the main types of landslide types: rockfalls; earth and debris flows; rotational and translational slides; and complex landslides. The landslide susceptibility analysis and modelling followed the GIS matrix method and was spatially validated with new landslides with reliable results. In addition, a methodology is presented for the derivation of landslide hazard and risk in urban areas using the obtained susceptibility zones, and the destructive potential of the landslide types based on the
expected magnitude and speed of the future events for the different landslide types. This is useful when local information about the temporal distribution of landslides and critical heavy rainfall are lacking. As the research was undertaken at a scale 1:50.000 the results are not intended for a precise knowledge of hazard at a detailed scale. Nevertheless, it is possible to identify zones in towns with relative higher hazard in order to promote programmes of control and mitigation of the expected landslides and also to reduce the vulnerability of the affected urban areas to the landslides processes.
expected magnitude and speed of the future events for the different landslide types. This is useful when local information about the temporal distribution of landslides and critical heavy rainfall are lacking. As the research was undertaken at a scale 1:50.000 the results are not intended for a precise knowledge of hazard at a detailed scale. Nevertheless, it is possible to identify zones in towns with relative higher hazard in order to promote programmes of control and mitigation of the expected landslides and also to reduce the vulnerability of the affected urban areas to the landslides processes.
Reference:
The 10th IAEG International Congress, Nottingham, United Kingdom, 6-10 September 2006, Paper number 414
The 10th IAEG International Congress, Nottingham, United Kingdom, 6-10 September 2006, Paper number 414
Organization:
University of Granada
Spain
University of Granada
Spain
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