1887

Abstract

Summary

Non-invasive geophysical methods have become increasingly important tools for rapid and cost-effective imaging of near surface for various geotechnical purposes. For past a few decades, airborne geophysics has been gaining increasing applications towards near surface characterization for aquifer mapping, managed aquifer recharge, mineral exploration, tunnel related studies, etc. An integrated study consists of helicopter borne electromagnetic (AEM), ground based electromagnetic (GEM), electrical resistivity tomography (ERT), borehole drilling and logging has been carried out for secured water supply through French well construction under smart city program of Surat city, Gujarat, India. The AEM survey was carried out in dual moment mode, where low and high moments provide respectively shallow and deep subsurface information. The low moment data has been further subjected to on-time modeling including primary field and system response corrections. The resultant low moment inverted resistivity model has been compared with ERT data for resolving very near surface features especially top a few meter strata that acts as first check to infiltration facilitating groundwater recharge. Study revealed that the performance of AEM LM data with on-time modeling including PFC and system response corrections provides comparable result to ERT of 10 m unit electrode spacing in resolving near surface-vertical features.

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2023-11-07
2026-04-10

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References

  1. 1.Andersen, K. R., Christiansen, A. V., Auken, E. & Nyboe, N. S., 2016. Modeling and inversion of the TEM response during transmitter ramp-down. p. 25
     [Google Scholar]
  2. 2.Auken, E., Foged, N., Andersen, K.N., Nyboe, N.S., Christiansen, A.V. (2019): On-time modelling using system response convolution for improved shallow resolution of the subsurface in airborne TEM, Exploration Geophysics, DOI: 10.1080/08123985.2019.1662292.
     https://doi.org/10.1080/08123985.2019.1662292 [Google Scholar]
  3. 3.CGWB, Hydrogeology and groundwater resources of Rajkot district (district groundwater brochure, Surat district, Gujarat state2013
     [Google Scholar]
  4. 4.Chandra, S., Tiwari, V.M., 2022. Rapid 3D geophysical imaging of aquifers in diverse hydrogeological settings, Water Security15, 100111.
     [Google Scholar]
  5. 5.ChandraS., AukenE., MauryaP.K., AhmedS., and VermaS.K, (2019). Large scale mapping of fractures and groundwater pathways in crystalline hard rock by AEM, Scientific Reports9: 398, DOI:10.1038/s41598‑018‑36153‑1
     https://doi.org/10.1038/s41598-018-36153-1 [Google Scholar]
  6. 6.Chandra, S., Ahmed, S., Auken, E., Pedersen, J. B., Singh, A., & Verma, S. K. (2016). 3D aquifer mapping employing airborne geophysics to meet India’s water future.The Leading Edge, 35(9), 770–774. https://doi.org/10.1190/tle35090770.1
     [Google Scholar]
  7. 7.Chandra, S., Choudhury, J., Maurya, P. K., Ahmed, S., Auken, E., & Verma, S. K. (2020). Geological significance of delineating paleochannels with AEM.Exploration Geophysics, 51(1), 74–83. https://doi.org/10.1080/08123985.2019.1646098.
     [Google Scholar]
  8. 8.Eberle, D. G., & Siemon, B. (2006). Identification of buried valleys using the BGR helicopter-borne geophysical system.Near Surface Geophysics, 4, 125–133. https://doi.org/10.3997/1873-0604.2005038
     [Google Scholar]
  9. 9.Huang, H. , Rudd, J.2008. Conductivity-depth imaging of helicopter-borne TEM data based on a pseudo layer half-space model, Geophysics73(3), F115–F120. https://doi.org/10.1017/CBO978113917116
     [Google Scholar]
  10. 10.Jørgensen, F., Sandersen, P.B.E., Auken, E.2003. Imaging buried Quaternary valleys using the transient electromagnetic method, J. Appl. Geophys.53 (4), 199–213.
     [Google Scholar]
  11. 11.Knight, R., Steklova, K., Miltenberger, A., Kang, S., Goebel M., and Fogg, G. (2022) Airborne geophysical method images fast paths for managed recharge of California’s groundwater.Environ. Res. Lett.17124021. DOI:10.1088/1748‑9326/aca344
     https://doi.org/10.1088/1748-9326/aca344 [Google Scholar]
  12. 12.Knight, R., Smith, R., Asch, T., Abraham, J., Cannia, J., Viezzoli, A., & Fogg, G. (2018). Mapping aquifer systems with airborne electromagnetics in the Central Valley of California.Groundwater, 56(6), 893–908. https://doi.org/10.1111/gwat.12656
     [Google Scholar]
  13. 13.Siemon, B., Christiansen, A. V., & Auken, E. (2009). A review of helicopter borne electromagnetic methods for groundwater exploration.Near Surface Geophysics, 7, 629–646. https://doi.org/10.3997/1873-0604.2009043
     [Google Scholar]
  14. 14.Singh, P.K., Singh, M. P., Singh, A.K., 2010. Petrochemical characterization and evolution of Vastan Lignite, Gujarat, India.International Journal of Coal Geology82(1):1–6 DOI:10.1016/j.coal.2010.01.003
     https://doi.org/10.1016/j.coal.2010.01.003 [Google Scholar]
/content/papers/10.3997/2214-4609.202375067
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Evaluating Vertical Resolution of AEM Investigations for Near Surface Mapping
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.202375067
/content/papers/10.3997/2214-4609.202375067
/content/papers/10.3997/2214-4609.202375067
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