The Torvizcón, Spain, landslide of February 1996: the role of lithology in a semi-arid climate

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Publicado: jul 1, 1999
DOI: https://doi.org/10.22201/igeof.00167169p.1999.38.3.380
Palabras clave:
deslizamientos superficiales, terrenos metamórficos, modelo infinito de ladera, análisis retrospectivo, análisis de sensitividad

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Irasema Alcántara-Ayala
Department of Geography, King’s College London, Strand, London, U.K. ; Present address: Massachusetts Institute of Technology, Depart. of Civil and Environmental Engineering, Cambridge, MA.

Resumen

En este trabajo se presenta un análisis de deslizamientos superficiales en terrenos metamórficos bajo condiciones de semiaridez en las Alpujarras, España. Los extensos afloramientos de filitas y de micaesquistos son factores claves para el entendimiento de este tipo de procesos de ladera en esta región. La esquistosidad ofrece planos de debilidad, por los cuales el agua puede penetrar y fragmentar la roca. Eventos de precipitación extremos causaron daños a la infraestructura local y regional, incrementando la probabilidad de que se desarrollen desastres naturales. A partir de la prueba directa de resistencia al esfuerzo cortante se presenta un análisis retrospectivo del deslizamiento Torvizcón, utilizando el modelo de ladera infinita de Skempton y DeLory. El análisis de sensibilidad indicó que uno de los factores de control más importante de este tipo de movimientos está relacionado con las propiedades de los materiales, por lo cual el ángulo de inclinación de las laderas no es el único elemento que debe ser considerado en el establecimiento de los umbrales de estabilidad.

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Cómo citar
Alcántara-Ayala , I. (1999). The Torvizcón, Spain, landslide of February 1996: the role of lithology in a semi-arid climate. Geofísica Internacional, 38(3), 175–184. https://doi.org/10.22201/igeof.00167169p.1999.38.3.380
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Vol. 38 Núm. 3 (1999): Julio 1, 1999
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Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial-CompartirIgual 4.0.

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