[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Frequency domain electromagnetic induction survey in the intertidal zone: limitations of low-induction-number and depth of exploration
Delefortrie, S.; Saey, T.; Van De Vijver, E.; De Smedt, P.; Missiaen, T.; Demerre, I.; Van Meirvenne, M. (2014). Frequency domain electromagnetic induction survey in the intertidal zone: limitations of low-induction-number and depth of exploration. J. Appl. Geophys. 100: 14-22. dx.doi.org/10.1016/j.jappgeo.2013.10.005
In: Journal of applied geophysics. ELSEVIER SCIENCE BV: Tokyo; New York; London; Amsterdam. ISSN 0926-9851; e-ISSN 1879-1859, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Near-surface geophysics; Electromagnetic induction; Apparent electricalconductivity; Low-induction-number; Intertidal zone; Depth ofexploration
Auteurs  Top 
  • Delefortrie, S., meer
  • Saey, T., meer
  • Van De Vijver, E., meer
  • De Smedt, P., meer
  • Missiaen, T., meer
  • Demerre, I., meer
  • Van Meirvenne, M., meer
Abstract
    Subsurface investigation in the Belgian intertidal zone is severely complicated due to high heterogeneity and tides. Near-surface geophysical techniques can offer assistance since they allow fast surveying and collection of high spatial density data and frequency domain electromagnetic induction (EMI) was chosen for archaeological prospection on the Belgian shore. However, in the intertidal zone the effects of extreme salinity compromise validity of low-induction-number (LIN) approximated EMI data. In this paper, the effects of incursion of seawater on multi-receiver EMI data are investigated by means of survey results, field observations, cone penetration tests and in-situ electrical conductivity measurements. The consequences of LIN approximation breakdown were researched. Reduced depth of investigation of the quadrature-phase (Qu) response and a complex interpretation of the in-phase response were confirmed. Nonetheless, a high signal-to-noise ratio of the Qu response and viable data with regard to shallow subsurface investigation were also evidenced, allowing subsurface investigation in the intertidal zone.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ.