1887
Volume 43, Issue 3
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

[

Dissolution of limestone in a karst area resulted in ground shakes and enhancement of fractures. Gravity and electro-resistivity profiles mapped concealed caves, determined groundwater level, and defined five risk areas by correlating gravity lows with caves and conductive zones with brine water, providing information for future hydrological and geotechnical work.

,

On October 2008, the large extent of dissolution of limestone in the Irecê Basin resulted in the occurrence of minor ground shakes and the enhancement of fractures along the surface of the ground and on the walls of buildings in the urban and periurban area of the city of Lapão. After preliminary geological and geotechnical studies to analyse the danger of collapse of underground caves, we have carried out gravity and electro-resistivity profiles in order to map the concealed caves and to help the determination of the level of groundwater within them. The interpretation of the results provided useful information both for the immediate safety of the population and for subsequent hydrological and geotechnical work. We have defined five risk areas based on the variations of the Bouguer and of the electrical resistivity data, by correlating the distribution of gravity lows with the presence of caves and the less resistive zones with the presence of brine water underground.

]
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2012-09-01
2026-01-23

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References

  1. Ardestani V. E. 2008 Modelling the karst zones in a dam site through micro-gravity data: Exploration Geophysics 39 204 209 10.1071/EG08022
    https://doi.org/10.1071/EG08022 [Google Scholar]
  2. Auler A. Farrant A. R. 1996 A brief introduction to karst and caves in Brazil: Proceedings of the University of Bristol Spelaeological Society 20 187 200
    [Google Scholar]
  3. Azevedo, A. A., 2009, Analysis of the causes of cracks and fractures in the terrain and edifications in the urban area of the Lapão municipality (in Portuguese): IPT/GEOTECNIA Technical Report, São Paulo, 38p.
  4. Butler S. J. 1984 Microgravimetric and gravity gradient techniques for detection of subsurface cavities: Geophysics 49 1084 1096 10.1190/1.1441723
    https://doi.org/10.1190/1.1441723 [Google Scholar]
  5. Fretwell J. D. Stewart M. T. 1981 Resistive study of a coastal karst terrain, Florida: Ground Water 19 156 162 10.1111/j.1745‑6584.1981.tb03454.x
    https://doi.org/10.1111/j.1745-6584.1981.tb03454.x [Google Scholar]
  6. Hiltunen D. R. Cramer B. J. 2008 Application of seismic refraction tomography in karst terrane: Journal of Geotechnical and Geoenvironmental Engineering 134 938 948 10.1061/(ASCE)1090‑0241(2008)134:7(938)
    https://doi.org/10.1061/(ASCE)1090-0241(2008)134:7(938) [Google Scholar]
  7. Hinze W. Aiken C. Brozena J. Coakley B. Dater D. Flanagan G. Forsberg R. Hildenbrand T. Keller G. Kellogg J. Kucks R. Li X. Mainville A. Morin R. Pilkington M. Plouff D. Ravat D. Roman D. Fucugauchi J. Véronneau M. Webring M. Winester D. 2005 New standards for reducing gravity data: the North American gravity database: Geophysics 70 J25 J32 10.1190/1.1988183
    https://doi.org/10.1190/1.1988183 [Google Scholar]
  8. Hughes L. J. 2009 Mapping contaminant transport structures in karst bedrock with ground-penetrating radar: Geophysics 74 B197 B208 10.1190/1.3223312
    https://doi.org/10.1190/1.3223312 [Google Scholar]
  9. Jacob T. Chery J. Bayer R. Le Moigne N. Boy J. P. Vernant P. Boudin F. 2009 Time-lapse surface to depth gravity measurements on a karst system reveal the dominant role of the epikarst as a water storage entity: Geophysical Journal International 177 347 360 10.1111/j.1365‑246X.2009.04118.x
    https://doi.org/10.1111/j.1365-246X.2009.04118.x [Google Scholar]
  10. Keller, G. V., 1987, in M. N. Nabighian, ed., Rock and mineral properties: electromagnetic methods in applied geophysics, 1, Theory, Chapter 2: Society of Exploration Geophysics, 13–51.
  11. Leucci G. De Giorgi L. 2010 Microgravimetric and ground penetrating radar geophysical methods to map the shallow karstic cavities network in a coastal area (Marina Di Capilungo, Lecce, Italy): Exploration Geophysics 41 178 188 10.1071/EG09029
    https://doi.org/10.1071/EG09029 [Google Scholar]
  12. Luciano, R., Leal, L., Nascimento, S., and Luz, J., 2005, Hydrochemical characteristics and quality of the groundwater of Rio Salitre hydrographical basin, Bahia, Brasil (in Portuguese): Expanded Abstracts of the III Symposium of the São Francisco Craton, Salvador, BA, 370–372.
  13. Monteiro, M. D., 1996, Project of the Supergenic Phosphate (in Portuguese): SME-CBPM Agreement Technical Report, Salvador, 30 p.
  14. Palacky, G. J., 1987, in M. N. Nabighian, ed., Resistivity characteristics of geologic targets: electromagnetic methods in applied geophysics, 2, Theory, Chapter 3: Society of Exploration Geophysics, 53–129.
  15. Park S. Changryol K. Son J. S. Yi M. J. Kim J. H. 2009 Detection of cavities in a karst area by means of a 3D electrical resistivity technique: Exploration Geophysics 40 27 32 10.1071/EG08114
    https://doi.org/10.1071/EG08114 [Google Scholar]
  16. Plouff D. 1976 Gravity and magnetic fields of polygonal prisms and application to magnetic terrain corrections: Geophysics 41 727 741 10.1190/1.1440645
    https://doi.org/10.1190/1.1440645 [Google Scholar]
  17. Ramos S. Araujo H. Leal L. Luz J. Dutton A. 2007 Temporal variation of the phreatic level of the karstic aquifer of Irecê – Bahia: contribution for the management of groundwater in the semi-arid region: Revista Brasileira de Geociências 37 227 233
    [Google Scholar]
  18. Silva J. S. Jr Ferreira F. J. F. Stevanato R. 2006 Application of the gravimetric and IP/ER methods in an area of geotechnical risk of the Almirante Tamandaré karstic aquifer system – Paraná, Brazil: Revista Brasileira de Geofísica 24 411 428 (in Portuguese)
    [Google Scholar]
  19. Souza, S. L., de Brito, P. C. R., and Silva, R. W. S., 1993, Stratigraphy, sedimentology, and mineral resources of the Salitre Formation in the Irecê Basin, Bahia (in Portuguese): CBPM Open Files Series, 2, 24 p.
  20. Stepisnik U. 2008 The application of electrical resistivity imaging in collapse doline floors: Divaca karst, Slovenia: Studia Geomorphologica Carpatho-Balcanica 12 41 51
    [Google Scholar]
  21. Sumanovac F. Weisser M. 2001 Evaluation of resistivity and seismic methods for hydrogeological mapping in karst terranes: Journal of Applied Geophysics 47 13 28 10.1016/S0926‑9851(01)00044‑1
    https://doi.org/10.1016/S0926-9851(01)00044-1 [Google Scholar]
  22. Wannamaker, P. E., 1992, Finite element program for dipole–dipole resistivity/IP forward and parameterized inversion of two-dimensional earth resistivity structure: IP2DI-v1.00: University of Utah Research Institute, Report ESL-92002-TR.
  23. Yilmaz S. 2007 Investigation of Gürbulak landslide using 2D electrical resistivity image profiling method (Trabzon, northeastern Turkey): Journal of Environmental & Engineering Geophysics 12 199 205
    [Google Scholar]
  24. Yule D. E. Sharp M. K. Butler D. K. 1998 Microgravity investigations of foundation conditions: Geophysics 63 95 103 10.1190/1.1444331
    https://doi.org/10.1190/1.1444331 [Google Scholar]
  25. Zhou W. Beck B. F. Adams A. L. 2002 Effective electrode array in mapping karst hazards in electrical resistivity tomography: Journal of Environmental Geology 42 922 928 10.1007/s00254‑002‑0594‑z
    https://doi.org/10.1007/s00254-002-0594-z [Google Scholar]
/content/journals/10.1071/EG10020
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Analysis of the risk of karst collapse in Lapão, Bahia, Brazil
Exploration Geophysics 43, 198 (2012); https://doi.org/10.1071/EG10020
/content/journals/10.1071/EG10020
/content/journals/10.1071/EG10020
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  • Article Type: Research Article
Keyword(s): collapse; electroresistivity; gravity; karst

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