1:5000 Landslide map of the upper Gállego Valley (central Spanish Pyrenees)

Jesús Guerrero, Francisco Gutiérrez, Domingo Carbonel, Jaime Bonachea, Jose Maria Garcia-Ruiz, Jorge Pedro Galve and Pedro Lucha

Journal of Maps, 2012, vol. 8, issue 4, 484-491

Abstract: A 1:5000 scale geomorphological landslide inventory map of the glaciated headwaters of the Gállego River in the Spanish Pyrenees is presented. This map, covering an area of 57.6 km-super-2 and mainly produced by direct mapping in the field, provides a more comprehensive and accurate picture of the distribution of slope movements than previous maps. Around 20% of the area is affected by large flow-dominated slope movements developed on Paleozoic slates. Our map shows that some of these post-glacial landslides have blocked the main drainage at several sites creating landslide-dammed lakes. The damage caused by landslides in the mapped area, with an estimated cost of greater 10 million euros, is mostly related to the activity of pre-existing slope movements, some of which have been reactivated or accelerated by adverse human alterations (e.g., excavation at the toe, overloading, higher water infiltration). This study illustrates that the incorporation of detailed cartographic landslide inventories in the planning and development process of alpine areas may contribute to reduce significant landslide-related damage in a cost-effective manner.

Date: 2012
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DOI: 10.1080/17445647.2012.751345

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