The Diezma landslide (A-92 motorway, Southern Spain): history and potential for future reactivation

Peces, Martín Jesús Rodríguez; Azañón, José Miguel; García-Mayordomo, Julián; Yesares, Jesús; Troncoso, Emilia; Tsigé, Meaza

doi:10.1007/s10064-011-0371-x

Cited by 17 publications

(8 citation statements)

References 7 publications

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“…The Diezma landslide is located 25 km from the city of Granada (Fig. 1); although the slope had repeatedly suffered small scale stability problems since the construction of the A-92 highway, a larger failure occurred on 18 March 2001 causing several damages (Rodríguez-Peces et al 2011;Delgado et al 2015). The landslide has a main translational mechanism and involves an estimated volume of 1.2 Mm 3 , constituted of a chaotic deposit of silt and clay with heterometric blocks of limestones (Azañón et al 2010).…”

Section: Unconventional Pseudostatic Analysismentioning

confidence: 99%

Earthquake-Induced Reactivation of Landslides: Recent Advances and Future Perspectives

Martino

2015

Earthquakes and Their Impact on Society

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Section: Unconventional Pseudostatic Analysismentioning

confidence: 99%

Earthquake-Induced Reactivation of Landslides: Recent Advances and Future Perspectives

Martino

2015

Earthquakes and Their Impact on Society

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“…The Diezma landslide is located in a moderate-relief area of the central sector of the Betic Cordillera (SE Spain), close to the village of Diezma (Figure 1). This area, which is located at the boundary between the external (South Iberian Domain) and internal zones (Alborán Domain) of the Betic Cordillera, is affected by landslides of variable sizes and types, most of which probably represent reactivated ancient failures [11,32,33].…”

Section: Geological and Geographical Setting Of The Diezma Landslidementioning

confidence: 99%

Formation of Clay-Rich Layers at The Slip Surface of Slope Instabilities: The Role of Groundwater

Castro

Asta

Arnedo

et al. 2020

Water

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Some landslides around the world that have low-angle failure planes show exceptionally poor mechanical properties. In some cases, an extraordinarily pure clay layer has been detected on the rupture surface. In this work, a complex landslide, the so-called Diezma landslide, is investigated in a low- to moderate-relief region of Southeast Spain. In this landslide, movement was concentrated on several surfaces that developed on a centimeter-thick layer of smectite (montmorillonite-beidellite) clay-rich level. Since these clayey levels have a very low permeability, high plasticity, and low friction angle, they control the stability of the entire slide mass. Specifically, the triggering factor of this landslide seems to be linked to the infiltration of water from a karstic aquifer located in the head area. The circulation of water through old failure planes could have promoted the active hydrolysis of marly soils to produce new smectite clay minerals. Here, by using geophysical, mineralogical, and geochemical modelling methods, we reveal that the formation and dissolution of carbonates, sulfates, and clay minerals in the Diezma landslide could explain the elevated concentrations of highly plastic secondary clays in its slip surface. This study may help in the understanding of landslides that show secondary clay layers coinciding to their low-angle failure planes.

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“…The marl composing the tongue Engineering Geology of Granada revealed a high proportion of expansive clay. The repair of the highway took more than 1 month until the traffic was fully restored (Rodríguez-Peces et al, 2011).…”

Section: Other Recent Casesmentioning

confidence: 99%

Engineering and Environmental Geology of Granada and its Metropolitan Area (Spain)

Chacón

Irigaray

Hamdouni

et al. 2012

Environmental & Engineering Geoscience

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Granada and its metropolitan area lie on the eastern edge of a basin where the foothills rise into the adjacent Sierra Nevada (3,482 m). On the west the valley is bordered by several faulted, Quaternary-age alluvial fans and by dissected terraces of the Genil River. Landscape evolution from about Tortonian to Pleistocene time is reflected by relict Quaternary glaciers preserved on a deeply eroded lower Paleozoic terrain and by terrace remnants and channels resulting from rapid Late Pleistocene and Holocene fluvial incision. This particular geological, geomorphic, and active tectonic setting, combined with a Mediterranean climate under continental influence, and the rapid urban development in the last 60 years have increased exposure to several natural hazards. Urban expansion has increased flash-flood and mass-wasting vulnerability, and seismic risk is similarly increasing with the 1884 Andalusian Earthquake (M 6.3), reflecting the last of several large, ,500-year recurrence temblors that have affected the area since at least Roman times. Modern Granada and its metropolitan area, with about a half million inhabitants, are currently increasingly challenged by the highest levels of exposure to natural hazards, by strain on traditional society resulting from adapting to the changes produced by the three decades since the advent of democracy (1978) and by the consequences of the deep economic crisis.

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The Diezma landslide (A-92 motorway, Southern Spain): history and potential for future reactivation

Cited by 17 publications

References 7 publications

Earthquake-Induced Reactivation of Landslides: Recent Advances and Future Perspectives

Earthquake-Induced Reactivation of Landslides: Recent Advances and Future Perspectives

Formation of Clay-Rich Layers at The Slip Surface of Slope Instabilities: The Role of Groundwater

Engineering and Environmental Geology of Granada and its Metropolitan Area (Spain)

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