Ambient Noise Measurements to Constrain the Geological Structure of the Güevéjar Landslide (S Spain)

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Título: Ambient Noise Measurements to Constrain the Geological Structure of the Güevéjar Landslide (S Spain)
Autor/es: Delgado, Jose | Galiana-Merino, Juan José | García Tortosa, Francisco Juan | Garrido Manrique, Jesús | Lenti, Luca | Martino, Salvatore | Peláez Montilla, José Antonio | Rodríguez Peces, Martín Jesús | Sanz de Galdeano, Carlos | Soler Llorens, Juan Luis
Grupo/s de investigación o GITE: Geología Aplicada e Hidrogeología | Grupo de Ingeniería y Riesgo Sísmico (GIRS)
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Palabras clave: Landslide | Geophysical prospecting | Ambient noise | f-k technique | HVSR
Área/s de conocimiento: Geodinámica Externa | Teoría de la Señal y Comunicaciones
Fecha de publicación: 5-feb-2021
Editor: MDPI
Cita bibliográfica: Delgado J, Galiana-Merino JJ, García-Tortosa FJ, Garrido J, Lenti L, Martino S, Peláez JA, Rodríguez-Peces MJ, Galdeano CSd, Soler-Llorens JL. Ambient Noise Measurements to Constrain the Geological Structure of the Güevéjar Landslide (S Spain). Applied Sciences. 2021; 11(4):1454. https://doi.org/10.3390/app11041454
Resumen: The reactivation of very large landslides may cause severe damage to society. Its prevention and management requires detailed information on the geometry and structure of these landslides, but the use of standard techniques (boreholes) may be prohibitive from an economic point of view. To overcome these difficulties, geophysical techniques are of special interest because they allow for studying very large areas at a reasonable cost. In this paper, we present a case study wherein the analysis of ambient noise allowed us to produce a model of a large landslide near Granada (southern Spain). The geometry and location of the failure zone, as well as the assessment of the state of involved materials, were estimated by combining two available boreholes and different geophysical techniques (downhole tests and the spectral analysis of ambient noise, horizontal to vertical spectral ratios (HVSR) and the frequency-wavenumber (f-k) methods). The results have allowed us to differentiate between values within the landslide mass with respect to those of stable materials, and to perform for the first time a comprehensive geological model of this unstable mass. Differences were also observed within the landslide mass (earth flow vs. slide zones), which are attributed to differences in the degree of alteration and the disturbance of the internal structure of materials constituting the landslide mass. These results show that techniques based on the measurement of ambient noise are of special interest for studying very large, highly remolded landslide masses.
Patrocinador/es: This study was funded by the EU (FEDER), by the Secretaría de Estado de Investigación, Desarrollo e Innovación of the Spanish government (projects CGL2015‐65602‐R and CGL2016‐77688‐R), by the Junta de Andalucía (project GGI3002IDIN), the Programa Operativo FEDER Andalucía 2014–2020—call made by the University of Jaén 2018, and by Research Groups VIGROB‐184 and VIGROB‐116 (University of Alicante).
URI: http://hdl.handle.net/10045/112588
ISSN: 2076-3417
DOI: 10.3390/app11041454
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Revisión científica: si
Versión del editor: https://doi.org/10.3390/app11041454
Aparece en las colecciones:INV - GAH - Artículos de Revistas
INV - GIRS - Artículos de Revistas

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