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Abstract

Summary

Long term time-lapse DC resistivity measurements along six 155 to 275 meter long traverses at the Kapiti Coast in New Zealand have been made to image a seasonal cycle in the saline interface movement. Two-monthly repetition of the measurements showed a continuous decrease of the bulk resistivity at depth and over an extended horizontal area when coming into the drier summer season. This observation is somewhat contradictory to the expectations and has its origin most possibly in a decrease of the fluid resistivity, likely due to a lower fresh water flow coupled with saltwater intrusion. Although, the changes from time step to time step are not always major on all profiles, ERT time-lapse monitoring proved itself a suitable tool to image the saline interface shape and movement along with changes in the subsurface resistivity distribution in an unconfined coastal sand aquifer and in a seasonal time frame.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201413706
2015-09-06
2024-04-18

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References

  1. CustodioE.
    [1987] Salt-fresh water interrelationships under natural conditions. In: CustodioE. and BruggemanGA. (Eds.) [1987]Studies and reports in hydrology: groundwater problems in coastal areas. UNESCO, Paris, 14–96.
     [Google Scholar]
  2. De FrancoR., BiellaG., TosiL., TeatiniP., LozejA., ChiozzottoB., GiadaM., RizzettoF., ClaudeC., MayerA., BassenV., Gasparetto-StoriG.
    [2009] Monitoring the saltwater intrusion by time lapse electrical resistivity tomography: The Chioggia test site (Venice Lagoon, Italy). Journal of Applied Geophysics, 69, 117–130.
     [Google Scholar]
  3. MorrowF.J., InghamM.R. and McConchieJ.A.
    [2010] Monitoring of tidal influences on the saline interface using resistivity traversing and cross-borehole resistivity tomography. Journal of Hydrology, 389, 69–77.
     [Google Scholar]
  4. Oude EssinkG.H.P.
    [2001] Improving fresh groundwater supply — problems and solutions. Ocean & Coastal Management, 44, 429–449.
     [Google Scholar]
  5. TidswellS.
    [2009] Kapiti Coast groundwater quality investigation, 2008. Greater Wellington Regional Council Report No. GW/EMI-T-09/246, 53p.
     [Google Scholar]
  6. WernerA.D., BakkerM., PostV.E.A., VandenbohedeA., LuC., Ataie-AshtianiB., SimmonsC.T., BarryD.A.
    [2013] Seawater intrusion processes, investigation and management: Recent advances and future challenges. Advances in Water Resources, 51, 3–26.
     [Google Scholar]
  7. WilsonS.R., InghamM. and McConchieJ.A.
    [2006] The applicability of earth resistivity methods for saline interface definition. Journal of Hydrology, 316, 301–312.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201413706
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Seasonal Monitoring of Saline Intrusion in an Unconfined Coastal Aquifer in New Zealand Using DC Resistivity Traversing
Conference Proceedings 2015, 1 (2015); https://doi.org/10.3997/2214-4609.201413706
/content/papers/10.3997/2214-4609.201413706
/content/papers/10.3997/2214-4609.201413706
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