Abstract

VILLACORTA, Sandra; FIDEL, Lionel  and  ZAVALA CARRION, Bilberto. Susceptibility mass movements map in Perú. Rev. Asoc. Geol. Argent. [online]. 2012, vol.69, n.3, pp.393-399. ISSN 0004-4822.

In 2009, the Geological Survey of Peru through the Direction of Environmental Geology and Geological Hazard, concluded the National Inventory of Geologic Hazard. One of products of this work is the "Susceptibility Map of Mass Movements in Peru" on scale 1:1.000.000. The objectives of this map are to set up a model that indicates the zones of high propensity to mass movements, in order to count with a dynamic tool for the risk management; to prioritize scenarios where specific studies are necessary, as well to raise the measures of prevention or mitigation adapted to assure the physical stability of urban zones and vulnerable infrastructures; this tool is also to contribute with the ecologic-economical zoning and land ordering, national objectives to 2021. The obtaining of these objectives had like previous step, the cartography of mass movements. The susceptibility has been obtained using a multi-variate heuristic model, which implies the crossed analysis of maps and geoprocessing operations. For the validation of the model, it was used the Inventory of geological hazard at national level, according to that, near 86% of the mass movements inventoried were concentrates in high and very high susceptibility categories. As a result of the analysis it is possible to conclude that the mass movement higher susceptibility zones in Peru are locate at: 1) To the western of the Peruvian Andes between Cajamarca-La Libertad-Ancash-Lima-Huancavelica; 2) Ayacucho-Apurimac-Cusco-Puno, in the southwestern; 3) Arequipa-Moquegua-Tacna, in the southeastern; 4) Junín-Pasco-Huanuco-San Martin, in the central and northeastern region; 5) Other smaller strips.

Keywords : Geological hazards; Mass movements; Heuristic model; Susceptibility; Land ordering.

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