Abstract
2D electrical resistivity tomography (ERT) data inversion and ground penetrating radar (GPR) techniques were used to investigate a cave in New Netim area, southeastern Nigeria. The aim of the research was to apply the non-destructive geophysical techniques in delineating a cave in New Netim. The Wenner electrode configuration was used during the electrical resistivity tomography data acquisition while the common-offset mode was used in the ground penetrating radar scanning. The ERT inversion and GPR results quantitatively show strong contrast in electrical resistivity and dielectric permittivity between the host rock (i.e., limestone) and the void. The differences in the electrical properties and dielectric permittivities of the top loamy soils, weathered limestone and the host rock (i.e., Mfamosing limestone) observed, in contrast to the response from the void were explored. The two combined geophysical techniques with their inversion results gave a reliable near surface geologic model, where both methods show relatively good correlation with regards to delineating the depth to top of the cave (~2.7 m). The joint interpretation of the ERT and GPR was effective in reducing the uncertainty associated with geophysical methods used in locating cavities on a standalone basis. The low cost, fast, environmental friendly and high resolving abilities though at shallow depths of the ERT and GPR techniques have continued to favour their usage in resolving near surface environmental and engineering problems. Generally, caves provide important geotourism attraction sites, hence certain recommendations were put forward that can guide further studies, like the application of Steiner’s geostatistical inversion techniques and other post-exploration development strategies.
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40328-021-00364-2/MediaObjects/40328_2021_364_Fig1_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40328-021-00364-2/MediaObjects/40328_2021_364_Fig2_HTML.jpg)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40328-021-00364-2/MediaObjects/40328_2021_364_Fig3_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40328-021-00364-2/MediaObjects/40328_2021_364_Fig4_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40328-021-00364-2/MediaObjects/40328_2021_364_Fig5_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40328-021-00364-2/MediaObjects/40328_2021_364_Fig6_HTML.png)
Similar content being viewed by others
Data availability
The data used for this work has been included in the manuscript.
Code availability
The software used has been properly documented in the manuscript.
References
Akpan AE, Ekwok SE, Ebong ED, George AM, Okwueze EE (2018) Coupled geophysical characterization of shallow fluvio-clastic sediments in Agwagune, southeastern Nigeria. J Afr Earth Sci 143:67–78
Andrej M, Uroš S (2012) Electrical resistivity imaging of cave Divaška Jama, Slovenia. J Cave Karst Stud 74(3):235–242. https://doi.org/10.4311/2010ES0138R1
Arango-Galván C, De la Torre-González B, Chávez-Segura RE, Tejero-Andrade A, Cifuentes-Nava G, Hernández-Quintero E (2011) Structural pattern of subsidence in an urban area of the southeastern Mexico Basin inferred from electrical resistivity tomography. Geofísica Internacional 50(4):401–409
Baracza MK, Turai E, Nádasi E, Gyulai Á (2018) CGI inversion method presented through a field case. Geosci Eng 6(9):40–52
Caramanna G, Ciotoli G, Nisio S (2008) A review of natural sinkhole phenomena in Italian plain areas. Nat Hazards 45:145–172. https://doi.org/10.1007/s11069-007-9165-7
Carrière SD, Chalikakis K, Sénéchal G, Danquigny C, Emblanch C (2013) Combining electrical resistivity tomography and ground penetrating radar to study geological structuring of karst unsaturated zone. J Appl Geophys 94:31–41
Cong-Thi D, Dieu LP, Thibaut R, Paepen M, Ho HH, Nguyen F, Hermans T (2021) Imaging the structure and the saltwater intrusion extent of the Luy river Coastal Aquifer (Binh Thuan, Vietnam) using electrical resistivity tomography. Water 13(13):1743
Davis JL, Annan AP (1989) Ground-penetrating radar for high-resolution mapping of soil and rock stratigraphy. Geophys Prospect 37:531–551
de Groot-Hedlin C, Constable S (1990) Occam’s inversion to generate smooth, two-dimensional models from magnetotelluric data. Geophysics 55(12):1613–1624
Dobróka M, Gyulai Á, Ormos T, Csókás J, Dresen L (1991) Joint inversion of seismic and geoelectric data recorded in an underground coal mine 1. Geophys Prospect 39(5):643–665
Dobróka M, Szabó NP, Tóth J, Vass P (2016) Interval inversion approach for an improved interpretation of well logs. Geophysics 81(2):D155–D167
Ebong ED, Akpan AE, Onwuegbuche AA (2014) Estimation of geohydraulic parameters from fractured shale and sandstone aquifers of Abi (Nigeria) using electrical resistivity and hydrogeologic measurements. J Afr Earth Sci 96:99–109
Ebong ED, Akpan AE, Emeka CN, Urang JG (2017) Groundwater quality assessment using geoelectrical and geochemical approaches: case study of Abi Area, southeastern Nigeria. J Appl Water Sci 7(5):2463–2478
Ebong ED, Abong AA, Ulem EB, Ebong LA (2021) Geoelectrical resistivity and geologic characterization of hydrostructures for groundwater resource appraisal in the Obudu Plateau, southeastern Nigeria. J Nat Resour Res 30(3):2103–2117
Ekwok SE, Akpan AE, Kudamnya EA, Ebong ED (2020) Assessment of groundwater potential using geophysical data: a case study in parts of Cross River State, south-eastern Nigeria. Appl Water Sci. https://doi.org/10.1007/s13201-020-01224-0
El-Qady G, Hafez M, Abdalla M, Ushijima K (2005) Imaging subsurface cavities using geoelectric tomography and ground penetrating radar. J Cave Karst Stud 67(3):174–181
Evans RD, Frost MW, Dixon N, Stonecliffe-Jones M (2008) The response of ground penetrating radar (GPR) to changes in temperature and moisture condition of pavement materials. TC3 Conference.
Farquharson CG, Oldenburg DW (1998) Non-linear inversion using general measures of data misfit and model structure. Geophys J Int 134(1):213–227
Gambetta M, Armadillo E, Carmisciano C, Stefanelli P, Cocchi L, Tontini FC (2011) Determining geophysical properties of a near-surface cave through integrated microgravity vertical gradient and electrical resistivity tomography measurements. J Cave Karst Stud 73:11–15. https://doi.org/10.4311/jcks2009ex0091
Gyulai A, Ormos T, Dobroka M, Molnár JS (2016) Application of in-mine geoelectric methods for detecting tectonic disturbances of the coal seam structure. In 78th EAGE conference and exhibition 2016. European Association of Geoscientists & Engineers. 2016(1): 1–5
Gόmez-Ortiz D, Martín-Crespo T (2012) Assessing the risk of subsidence of a sinkhole collapse using ground penetrating radar and electrical resistivity tomography. Eng Geol 149–150:1–12. https://doi.org/10.1016/j.enggeo.2012.07.022
Gόmez-Ortiz D, Martín-Velazquez S, Martín-Crespo T, Márquez A, Lillo J, López I, Carreño F, Martín-González F, Herrera R, De Pablo MA (2007) Joint application of ground penetrating radar and electrical resistivity imaging to investigate volcanic materials and structures in Tenerife (Canary Islands, Spain). J Appl Geophys 62:287–300
Hu D, Li S, Chen J, Kamat VR (2019) Detecting, locating, and characterizing voids in disaster rubble for search and rescue. Adv Eng Inform 42:100974
Hussain Y, Uagoda R, Borges W, Nunes J, Hamza O, Condori C, Aslam K, Dou J, Cárdenas-Soto M (2020) The potential use of geophysical methods to identify cavities, sinkholes and pathways for water infiltration. Water 12(8):2289
Kaufmann G, Romanov D, Nielbock R (2011) Cave detection using multiple geophysical methods: unicorn cave Harz Mountains, Germany. Geophysics 76(3):B71–B77. https://doi.org/10.1190/1.3560245
Kemna A, Binley A, Ramirez A, Daily W (2000) Complex resistivity tomography for environmental applications. Chem Eng J 77(1–2):11–18
LaBrecque DJ, Miletto M, Daily W, Ramirez A, Owen E (1996) The effects of noise on Occam’s inversion of resistivity tomography data. Geophysics 61(2):538–548
Lambot S, Slob EC, Van den Bosch I, Stockbroeckx B, Scheers B, Vanclooster M (2003) GPR design and modeling for identifying the shallow subsurface dielectric properties. In proceedings of the 2nd international workshop on advanced ground penetrating radar, 2003. IEEE. pp. 130–135
Lazzari M, Loperte A, Perrone A (2010) Near surface geophysics techniques and geomorphological approach to reconstruct the hazard cave map in historical and urban areas. Adv Geosci 24:35–44
Leucci G, Masini N, Persico R (2012) Time–frequency analysis of GPR data to investigate the damage of monumental buildings. J Geophys Eng 9(4):S81–S91
Loke MH, Barker RD (1996) Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method. Geophys Prospect 44(1):131–152
Loke MH (2011) Electrical resistivity surveys and data interpretation. In: Gupta H (ed) Solid earth geophysics encyclopedia “Electrical & Electromagnetic,” 2nd edn. Springer, Verlag, pp 276–283
Loke MH (2004) Tutorial: 2-D and 3-D electrical imaging surveys
Łyskowski M, Mazurek E, Ziętek J (2014) Ground penerating radar investigation of limestone karst at the Odstrzelona cave in Kowala, Świętokrzyskie Mountains, Poland. J Cave Karst Stud 76(3):184–190. https://doi.org/10.4311/2014EX0001
Mosteller F, Tukey JW (1977) Data analysis and regression: a second course in statistics. Addison-Wesley, Reading, MA
Neal A (2004) Ground-penetrating radar and its use in sedimentology: principles, problems and progress. Earth Sci Rev 66:261–330
Negri S, Margiotta S, Quarta TAM, Castiello G, Fedi M, Florio G (2015) Integrated analysis of geological and geophysical data for the detection of underground man-made caves in an area in southern Italy. J Cave Karst Stud 77(1):52–62. https://doi.org/10.4311/2014ES0107
Newton JG, Hyde LW (1971) Sinkhole problem in and near Roberts Industrial Subdivision, Birmingham, Alabama – A reconnaissance: Geological Survey of Alabama Circular 68, 42 p
Nisio S, Caramanna G, Ciotoli G (2007) In: Parise M, Gunn J (eds) Sinkholes hazard in Italy: first results on the inventory and analysis of some case studies. Geological Society London Special publications: Natural and anthropogenic hazards in karst: Recognition, Analysis and Mitigation 279:23–45
Nyong EO, Ramanathan R (1985) A record of oxygen-deficient paleoenvironments in the Cretaceous of the Calabar Flank, SE Nigeria. J Afr Earth Sci 3(4):455–460. https://doi.org/10.1016/S0899-5362(85)80088-9
Ofoegbu CO (1984) Interpretation of aeromagnetic anomalies over the lower and middle benue trough of Nigeria. Geophys J Int 79(3):813–823. https://doi.org/10.1111/j.1365-246X.1984.tb02870.x
Oldenburg DW, Li Y (1994) Inversion of induced polarization data. Geophysics 59(9):1327–1341
Oldenburg DW, McGillivray PR, Ellis RG (1993) Generalized subspace methods for large-scale inverse problems. Geophys J Int 114(1):12–20
Parise M, Lollino P (2011) A preliminary analysis of failure mechanisms in karst and man-made underground caves in Southern Italy. Geomorphology 134(1–2):132–143. https://doi.org/10.1016/j.geomorph.2011.06.008
Petters SW, Reijers TJA (1997) Karst in the Mfamosing Limestone, southeastern Nigeria. Niger Assoc Petroleum Explorationists Bull 11(1):84–99
Putiška R, Kušnirák D, Dostál I, Lačný A, Mojzeš A, Hók J, Pašteka R, Krajňák M, Bošanský M (2014) Integrated geophysical and geological investigations of karst structures in Komberek, Slovakia. J Cave Karst Stud 76(3):155–163. https://doi.org/10.4311/2013ES0112
Reijers TJA, Petters SW (1987) Depositional environments and diagenesis of albian carbonates on the Calabar flank, SE Nigeria. J Pet Geol 10:283–294. https://doi.org/10.1111/j.1747-5457.1987.tb00947.x
Reynolds JM (1997) An introduction to applied and environmental geophysics. John Wiley and Sons Ltd
Robert T, Dassargues A, Brouyère S, Kaufmann O, Hallet V, Nguyen F (2011) Assessing the contribution of electrical resistivity tomography (ERT) and self-potential (SP) methods for a water well drilling program in fractured/karstified limestones. Journal of Applied Geophysics 75(1): 42–53
Saribudak M (2015) The million dollar question: which geophysical methods locate caves best over the Edwards Aquifer? A potpourri of case studies from San Antonio and Austin, Texas, USA: Presented at 14th Sinkhole Conference, NCKRI Symposium 5: 355–364
Sasaki Y (1992) Resolution of resistivity tomography inferred from numerical SIMULATION1. Geophys Prospect 40(4):453–463
Scales JA, Gersztenkorn A (1988) Robust methods in inverse theory. Inverse Prob 4(4):1071
Shin Y, Shin S, Cho SJ, Son JS (2021) Application of 3D electrical resistivity tomography in the yeoncheon titanomagnetite deposit. South Korea Miner 11(6):563
Steiner F (1988) Most frequent value procedures (a short monograph). Geophys Transactions 34(2–3):139–260
Steiner F (1991) The most frequent value: introduction to a modern conception of statistics. Akadémiai Kiadó
Steiner F (1997) Optimum methods in statistics. Akadémiai Kiadó
Szabó NP, Balogh GP, Stickel J (2018) Most frequent value-based factor analysis of direct-push logging data. Geophys Prospect 66(3):530–548
Szabo NP, Balogh GP (2016) Most frequent value based factor analysis of engineering geophysical sounding logs. In 78th EAGE conference and exhibition 2016. European Association of Geoscientists & Engineers. 2016(1): 1–5
Tikhonov AN, Goncharsky AV, Stepanov VV, Yagola AG (2013) Numerical methods for the solution of ill-posed problems. Springer Science & Business Media, p 328
Tosti F, Ciampoli LB, Calvi A, Alani AM, Benedetto A (2018) An investigation into the railway ballast dielectric properties using different GPR antennas and frequency systems. NDT and E Int 93:131–140
Uhlemann S, Chambers J, Falck WE, Tirado Alonso A, Fernández González JL, Espín de Gea A (2018) Applying electrical resistivity tomography in ornamental stone mining: challenges and solutions. Minerals 8(11): 491
Waltham T, Bell FG, Culshaw MG (2005) Sinkholes and subsidence: karst and cavernous rocks in engineering and construction. U.K., Springer, Chichester, p 382
Xu X, Zeng Q, Li D, Wu J, Wu X, Shen J (2010) GPR detection of several common subsurface voids inside dikes and dams. Eng Geol 111(1–4):31–42
Zhang J, McMechan GA (1995) Estimation of resolution and covariance for large matrix inversions. Geophys J Int 121(2):409–426
Zhang J (2018) Most frequent value statistics and the hubble constant. Publ Astron Soc Pac 130(990):084502
Zhou B, Kanl I (2018) Electrical resistivity tomography: a subsurfaceimaging technique. In Applied geophysics with case studies on environmental, exploration and engineering geophysics. IntechOpen, London, UK
Acknowledgements
The authors are thankful to the opinion leaders and the entire New Netim community for granting them access to their sacred land. We also express thanks to the Department of Physics, Applied Geophysics Unit, University of Calabar for releasing the equipment used for this research. This paper is to remember the late Professor Ferenc Steiner, who invented the Most Frequent Value (MFV) method as a robust statistical estimator, which gained a lot of applications after his death. The first author like also to thank Prof. I. Othman, General Director of Syrian Atomic Energy Commission for allowing Prof. J. Asfahani to participate in this research paper. His participation is really appreciated. Also, we acknowledge with thanks the Editor-in-Chief, Prof. V. Wesztergom, the Editor of the Special Issue, Prof. N. P. Szabó, the Guest Editor, Prof. M. Dobróka and the anonymous reviewers for their constructive comments during the different stages of the review process that have improved the quality of our manuscript.
Funding
No funding was received for conducting this study. The authors declare they have no financial interests.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
There is no conflict of interest.
Rights and permissions
About this article
Cite this article
Ebong, E.D., George, A.M., Ekwok, S.E. et al. 2D electrical resistivity inversion and ground penetrating radar investigation of near surface cave in New Netim area, southeastern Nigeria. Acta Geod Geophys 56, 765–780 (2021). https://doi.org/10.1007/s40328-021-00364-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40328-021-00364-2