1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 24th European Meeting of Environmental and Engineering Geophysics
  5. Conference paper

Abstract

Summary

The Ebro Delta is currently a place of interest due to the presence of zones vulnerable to subsidence. Determining the type of sediment that favours the subsidence and its identification in the subsoil is a critical task for planning protection actions in the Ebro Delta. In this point the geophysical methods can help providing subsoil information. The subsidence mainly relies on Holocene sediments (clays, silts, sands and organic deposits). All these materials are affected by salty, fresh or brackish water. For this reason, one of the best geophysical techniques to describe the geometrical structure of complex lithologies, and its spatial variation, is the electrical resistivity tomography (ERT). The used geophysical parameter is really sensitivity to the presence of ions, and efficiently detects fresh water and saline water zones. The application of ten ERT long profiles (355 m - 1km) distributed around the studied area are a well-suited way to study the different environments inside the delta and to understand its evolution, from coast to margin side. In addition, the established geoelectrical boundaries have been used as a reference to build the 3D geological model surfaces, which will be used to assess the subsidence of the whole delta plain.

© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201802517
2018-09-09
2024-04-24

  • From This Site

    /content/papers/10.3997/2214-4609.201802517
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. DeGroot-Hedlin, C. and Constable, S.
    , 1990. Occam’s inversion to generate smooth, twodimensional models form magnetotelluric data. Geophysics, 55, 1613–16.
     [Google Scholar]
  2. Loke, M.H. and Barker, R.D.
    , 1996a, Practical techniques for 3D resistivity surveys and data inversion. Geophysical Prospecting, 44, 499–524.
     [Google Scholar]
  3. , 1996b, Rapid least-squares inversion of apparent resistivity pseudo-sections by a quasiNewton method. Geophysical Prospecting, 44, 131–152.
     [Google Scholar]
  4. Loke, M.H. and Dahlin, T.
    , 2002. A comparison of Gauss-Newton and quasiNewton methods in resistivity imaging inversion. Journal of Applied Geophysics, 49, 149–162. (IF 1.327).
     [Google Scholar]
  5. Loke, M.H.
    , 2004. 2-D and 3-D electrical imaging surveys, (PDF available from http://www.geoelectrical.com/).
     [Google Scholar]
  6. Macau, A., Benjumea, B., Gabàs, A., Figueras, S. and Vilà, M.
    , 2015. The effect of shallow quaternary deposits on the shape of H/V spectral ratio. Surveys in Geophysics, 36(1), 185–208.
     [Google Scholar]
  7. Massey, A.C., Taylor, G.K.
    , 2007. Coastal evolution in south-west England, United Kingdom: an enhanced reconstruction using geophysical surveys. Mar Geol245: 123–140.
     [Google Scholar]
  8. Naudet, V., J. L.Fernández-Martínez, E.García-Gonzalo, and J.P.Fernández-Álvarez
    , 2008. Estimation of water table from self-potential data using Particle Swarm Optimization (PSO), SEG expanded abstract271203–1207.
     [Google Scholar]
  9. Sasaki, Y.
    , 1992. Resolution of resistivity tomography inferred from numerical simulation. Geophys Prospect40: 453–464.
     [Google Scholar]
  10. Silvestre, P.P. and Ferrari, R.L.
    (1990). Finite elements for electrical engineers, 2nd edition, Cambridge University Press. Sumanovac, F., 2006. Mapping of thin sandy aquifers by using high resolution reflection seismics and 2-D electrical tomography. J. Appl. Geophys.58, 144–157.
     [Google Scholar]
  11. Syvitski, J.P.M., Saito, Y.
    , 2007. Morphodynamics of deltas under the influence of humans. Global Planet. Changes57, 261–282.
     [Google Scholar]
  12. Ward, S.H.
    , 1990, Resistivity and induced polarization methods, In Wards, S.H. (Ed), Geotechnical and Environmental Geophysics, S.E.G., Tulsa, O.K., pp. 147–189.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201802517
Loading
Ebro Delta Geometry and Structure Characterization Using the Electrical Resistivity Imaging Method
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201802517
/content/papers/10.3997/2214-4609.201802517
/content/papers/10.3997/2214-4609.201802517
Loading

Data & Media loading...

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error