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Comparing different shallow geophysical methods in a tidal estuary, Verdronken Land van Saeftinge, Western Scheldt, the Netherlands
Missiaen, T.; Slob, E.; Donselaar, M.E. (2008). Comparing different shallow geophysical methods in a tidal estuary, Verdronken Land van Saeftinge, Western Scheldt, the Netherlands. Geol. Mijnb. 87(2): 151-164
In: Netherlands Journal of Geosciences. Kluwer/Cambridge University Press: Den Haag, Cambridge. ISSN 0016-7746; e-ISSN 1573-9708, meer
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| Trefwoorden |
Environments > Aquatic environment > Marine environment > Intertidal environment
Exploration > Geophysical exploration
Topographic features > Landforms > Coastal landforms > Tidal flats
Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
ANE, Nederland, Westerschelde, Verdronken Land van Saeftinge [Marine Regions]
Marien/Kust; Brak water |
| Author keywords |
Tidal estuary; intertidal flat; land-sea boundary; shallow geophysics; Western Scheldt |
| Auteurs | | Top |
- Missiaen, T.
- Slob, E.
- Donselaar, M.E.
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| Abstract |
In order to validate existing models of sedimentation in active sedimentary environments, detailed stratigraphic information is indispensable. Near-surface geophysical methods provide a means to acquire high-resolution images of the stratigraphic succession in the shallow subsurface. Land-based and marine methods have been tested in the Verdronken Land van Saeftinge. This intertidal flat area is cut by numerous tidal gullies, and high tidal amplitudes enable the application of different techniques at various water levels. Data acquisition focused on the upper 10-20 m of the active sediment bodies. Applied techniques include high-resolution seismic acquisition, geo-electrical methods (DC resistivity), electromagnetic techniques, CPT, and manual drilling. In general the acoustic methods allowed more reliable and detailed interpretation of the sedimentary structures than the electric/electromagnetic methods. The latter suffered from the effect of tidal action and salt-water intrusion, and their application on land proved very strenuous. CPT and shallow cores provided valuable ground-truth information. The results clearly indicate that no single technique can provide all the answers. Only an integrated use of (complementary) methods will allow getting a better grip on the sedimentary architecture and preservation potential in active estuarine sedimentary environments. |
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