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  First results from a new surface-towed controlled source electromagnetic experiment to detect offshore extensions of freshwater aquifers in the Adriatic Sea

Haroon, A., Pastoressa, A. E., Campo, B., Pellegrini, C., Faghih, Z., Mercorella, A., Franz, G., Rovere, M., Trincardi, F., Everett, M., Micallef, A. (2024): First results from a new surface-towed controlled source electromagnetic experiment to detect offshore extensions of freshwater aquifers in the Adriatic Sea. - In: Börner, J., Yogeshwar, P. (Eds.), - Protokoll über das 30. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung: St. Marienthal, 25. September - 29. September 2023, 30. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung (St. Marienthal 2023), 27-27, 1 p.

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026090 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026090_4
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https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026039 (Supplementary material)
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 Creators:
Haroon, A.1, Author
Pastoressa, A. E.1, Author
Campo, B.1, Author
Pellegrini, C.1, Author
Faghih, Z.1, Author
Mercorella, A.1, Author
Franz, G.1, Author
Rovere, M.1, Author
Trincardi, F.1, Author
Everett, M.1, Author
Micallef, A.1, Author
Affiliations:
130. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations, ou_5026038              

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 Abstract: play significant roles in coastal hydrologic systems. Despite the importance of these offshore groundwater systems and their interactions with onshore systems along global coastlines, a lack of understanding persists due to limitations in geophysical methodologies. Controlled-source electromagnetic (CSEM) techniques are one promising noninvasive avenue for identifying and characterizing OFG and SGD. However, the current availability of CSEM systems in academic research is limited, and applications are still restricted to specific regions. Existing CSEM systems are commonly associated with high deployment costs, logistical complexity, limited modification options and in case of seafloor-towed applications, slow data acquisition rates. To address these limitations, we introduce SWAN - a low-cost, modular, surface-towed hybrid time-frequency domain CSEM system capable of detecting OFG and SGD up to water depths of 100 m. A field test conducted in the central Adriatic Sea showcased the system's capabilities at water depths ranging from several tens to approximately 160 m. SWAN's ability to provide continuous measurements has proven effective in acquiring high-quality data while operating at towing speeds of 2.5 to 3 knots. The system's data coverage allows for the detection of subsurface resistivity variations to depths of approximately 150–200 m below the seafloor. With its user-friendly, modular design, SWAN offers a cost-efficient solution for investigating the hydrogeology of shallow offshore environments. The presentation shows the technological developments of SWAN, including illustrations of measured time series, processed data and first 2D inversion results from the Adriatic Sea.

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Language(s): eng - English
 Dates: 20242024
 Publication Status: Finally published
 Pages: 1
 Publishing info: -
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Title: 30. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung
Place of Event: St. Marienthal
Start-/End Date: 2023-09-25 - 2023-09-29

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Title: Protokoll über das 30. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung: St. Marienthal, 25. September - 29. September 2023
Source Genre: Proceedings
 Creator(s):
Börner, Jana1, 2, Editor
Yogeshwar, Pritam2, 3, Editor
Affiliations:
1 Technische Universität- Bergakademie Freiberg , ou_persistent22            
2 30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations, ou_5026038            
3 Universität zu Köln, ou_persistent22            
Publ. Info: Potsdam : Deutsche Geophysikalische Gesellschaft e. V.
Pages: 146 Volume / Issue: 30 Sequence Number: 9 Start / End Page: 27 - 27 Identifier: ISSN: 2190-7021