Evaluation of trenching, ground penetrating radar (GPR) and electrical resistivity tomography (ERT) for sinkhole characterization

Auteur(s) et Affiliation(s)

CARBONEL, D.

Dept. de Ciencias de la Tierra, Universidad de Zaragoza, Zaragoza, Espagne

RODRÍGUEZ, V.

Dept. de Ciencias de la Tierra, Universidad de Zaragoza, Zaragoza, Espagne

GUTIÉRREZ, F.

Dept. de Ciencias de la Tierra, Universidad de Zaragoza, Zaragoza, Espagne

MCCALPIN, J.P.

Geo-Haz Consulting Inc., Crestone, Etats-Unis

LINARES, R.

Dept. de Geología, Universidad Autónoma, Barcelona, Espagne

ROQUÉ, C.

Àrea de Geodinàmica Externa i Geomorfologia, Univ., Girona, Espagne

ZARROCA, M.

Dept. de Geología, Universidad Autónoma, Barcelona, Espagne

GUERRERO, J.

Dept. de Ciencias de la Tierra, Universidad de Zaragoza, Zaragoza, Espagne

SASOWSKY, I.

Dept. of Geology and Environmental Science, Univ., Akron, Etats-Unis

Description :
This paper explores the suitability and advantages of combining the trenching technique with geophysical surveys [ground penetrating radar (GPR) and electrical resistivity tomography (ERT)] for sinkhole characterization in a mantled karst area. The approach is applied to 2 active sinkholes concealed by anthropogenic deposits and formed by contrasting subsidence mechanisms; collapse and sagging. The stratigraphic and structural relationships observed in the trench were then used to infer the spatial evolution of the sinkholes (e.g. enlargement), their kinematic behavior (episodic versus progressive), and to differentiate discrete subsidence events and their associated magnitude. Numerical dates were used to estimate average subsidence rates and the recurrence of subsidence events. Such integrated data sets may be used as an objective basis to forecast the future behavior of potentially damaging sinkholes and to assess the associated hazard and risk.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2014, vol. 39, n°. 2, p. 214-227, nombre de pages : 14, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais