A shallow landslide induced by soil strength deterioration: Serra da Aliança mountain range (SE Brazil)

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2025-02-13 DOI:10.1016/j.jsames.2025.105419

Marcos Eduardo Hartwig , Cleber Gonzales de Oliveira , Prêntice Filho , Rogério Pinto Ribeiro , Lázaro Valentin Zuquette

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引用次数: 0

Abstract

In southeastern Brazil, landslides are often associated with prolonged and/or intense rainfall events. The km 14 sign of the ES-177 road located in the Espírito Santo State (SE Brazil) was blocked by a large translational landslide (∼31,000 m³) that occurred in the driest month of 2018. This study aimed to estimate the magnitude and the spatial distribution of surface displacements and to investigate the underlying reasons that led to slope failure. The study included the compilation of existing data, remote sensing techniques such as visual satellite image interpretation and Digital Image Correlation (DIC), site reconnaissance, geotechnical data, and 2D numerical modeling. The slope encompasses highly weathered banded gneiss covered by residual soil. The landslide appears to have evolved in different stages. Surface displacements reached up to 10 m. The slip surface is made of a thin clay band consisting of expansive clay (montmorillonite). It is believed that time-dependent mechanisms reduced shear strength triggering the landslide.

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来源期刊

Journal of South American Earth Sciences 地学-地球科学综合

CiteScore

3.70

自引率

22.20%

发文量

364

审稿时长

6-12 weeks

期刊介绍： Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.