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Hydrogeological testing to characterize a fractured granite

Essais Hydrogeologiques Pour Caracteriser un Granite Fracture

  • International Symposium Soil and Rock Investigation by In Situ Testing
  • Thème 3 Hydraulical and Hydrogeological Testing, to Determine the Permeability of the Pores or Transmissivity of the Fractures
  • Published:
Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur Aims and scope Submit manuscript

Abstract

A comprehensive program of in situ testing has been carried out in an iron ore mine in Stripa, Sweden, to investigate the problems of obtaining a hydrogeological characterization of a fractured granite rock mass. The field investigations consisted of: (1) the collection of fracture geometry and borehole injection test data to determine directional permeabilities, (2) a macropermeability experiment to determine the bulk rock mass permeability, (3) groundwater sampling for investigations of geochemistry and isotope hydrology, (4) pump testing of surface wells, and (5) tracer tests to determine effective porosity. This report summarizes results from all but the last item, the tracer work, which had not been carried out when the field work ended in 1981.

Résumé

Un programme complet d'expérimentations in situ a été mené dans la mine de fer de Stripa (Suède) pour déterminer les caractéristiques des écoulements dans un massif granitique fissuré. Les opérations de terrain ont été les suivantes: (1) recueil des données sur la géométrie des fractures et essais d'injection en forages pour déterminer les perméabilitités directionnelles. (2) expérience de macroperméabilité pour déterminer la perméabilité matricielle, (3) échantillonnages des eaux en vue d'analyses chimiques et isotopiques, (4) essais de pompage sur puits forés depuis la surface du sol, (5) traçages chimiques pour détermination de la porosité effective. La présente publication en résume les résultats. Seule l'expérience de traçage n'a pu être réalisée avant l'arrêt des travaux en 1981.

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References

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Authors and Affiliations

  1. Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA

    Witherspoon P. A.

  2. Memorial University of Newfoundland, St-Johns, Newfoundland, Canada

    Gale J. E.

Authors
  1. Witherspoon P. A.
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  2. Gale J. E.
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Witherspoon, P.A., Gale, J.E. Hydrogeological testing to characterize a fractured granite. Bulletin of the International Association of Engineering Geology 26, 515–526 (1982). https://doi.org/10.1007/BF02594268

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  • DOI: https://doi.org/10.1007/BF02594268

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