Investigating a damaging buried sinkhole cluster in an urban area integrating geomorphological surveys, geophysics and trenching

  1. V. Rodríguez 1
  2. D. Carbonel 1
  3. F. Gutiérrez 1
  4. J.P. Galve 1
  5. M. Zarroca 2
  6. R. Linares 2
  7. C. Roqué 3
  8. J. Guerrero 1
  9. J. McCalpin 4
  1. 1 Universidad de Zaragoza
    info
    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

    Geographic location of the organization Universidad de Zaragoza
  2. 2 Universitat Autònoma de Barcelona
    info
    Universitat Autònoma de Barcelona

    Barcelona, España

    ROR https://ror.org/052g8jq94

    Geographic location of the organization Universitat Autònoma de Barcelona
  3. 3 Universitat de Girona
    info
    Universitat de Girona

    Girona, España

    ROR https://ror.org/01xdxns91

    Geographic location of the organization Universitat de Girona
  4. 4 Geo-Haz Consulting Inc., Colorado, USA
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Book:
El Cuaternario Ibérico. Investigación en el s. XXI: VIII Reunión de Cuaternario Ibérico (Sevilla - La Rinconada 2013)
  1. Rafael Baena Escudero (coord.)
  2. José Juan Fernández Caro (coord.)
  3. Inmaculada Guerrero Amador (coord.)

Publisher: Asociación Española para el Estudio del Cuaternario

ISBN: 978-84-695-8601-3

Year of publication: 2013

Pages: 222-225

Congress: Reunión del Cuaternario Ibérico = Reuniâo do Quaternário Ibérico (8. 2013. La Rinconada (Sevilla))

Type: Conference paper

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Sustainable development goals

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SDG classification obtained using Aurora SDG artificial intelligence model.

Abstract

This work analyses a damaging complex sinkhole cluster within the mantled evaporite karst of Zaragoza city, NE Spain. A detailed map of modern surface deformation indicates two active coalescing sinkholes, whereas two additional dormant sinkholes, currently beneath human structures, are revealed by old aerial photographs. ERT data and a trench excavated in the topographic margin of one of the sinkholes consistently indicate a larger subsiding area. GPR data reveal that subsidence in the central sector of one of the sinkholes is mainly accommodated by sagging. The stratigraphic and structural relationships observed in the trench may be alternatively interpreted by three collapse events, or by progressive fault displacement combined with episodic anthropogenic excavation and fill. Average subsidence rates of >6.6 mm/yr and 40 mm/yr have been calculated using different techniques. This case study illustrates the need of conducting thorough investigations in sinkhole areas during the pre-planning stage including a geomorphic approach.

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