Gravitational processes on the eastern flank of the Nevado de Toluca, Mexico
Quesada, José Fernando Aceves; Paulín, Gabriel Legorreta; Yarummy, Alvarez-Ruíz
published: Jul 1, 2014
ArtNo. ESP022005802004, Price: 29.00 €
Landslides in volcanic terrains covered by poorly consolidated materials are common in Mexico. This investigation illustrates the landslides and geomorphologic changes of debris flow deposits in the town of Santa Cruz Pueblo Nuevo, State of Mexico, by using a multicriteria analysis in Geographic Information Systems to obtain a potential hazard map. The volcano is prone to landslides due to its loose vulcanoclastic sediments that are dragged by the streams and torrents during the rainy season. Unstable areas are mainly along first-order tributary streams and meander bends developed on lahars, pyroclastic flows, and pumice fall deposits whose stability has decreased in the basin. The unstable areas frequently create debris flows and debris slicing affecting the human settlements. On June 24, 1940, a large debris flow partially destroyed the town of Santa Cruz Pueblo Nuevo. Today, the town is settled in the alluvial fan of the old debris flows deposit. It is highly probable that the town will be affected again by landslides and debris flows. In an attempt to prevent future debris flows, walls of containment (gabions) have been constructed along the principal channel of the river La Ciénaga; nevertheless, in every rainy season the gabions are saturated and frequently destroyed.