| Autor: |
Raphael Rochlitz, Thomas Günther, P. Kotowski, Mike Müller-Petke, Mathias Ronczka |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
NSG2021 1st Conference on Hydrogeophysics. |
| DOI: |
10.3997/2214-4609.202120214 |
| Popis: |
Summary Electromagnetic measurements can provide valuable background information for many hydrogeological questions such as clay occurrence or saltwater intrusion. By using magnetic field sensors on a drone, one can efficiently cover large areas. A grounded electric dipole with a high voltage source generates an alternating current over a range of frequencies (32 Hz to 5 kHz). We show first results of a drone based semi-airborne setting on a site adjacent to the North Sea coast, where saltwater is intruding into a freshwater aquifer. We show the way from processing the raw magnetic data to subsurface models using a 500 m long line. Comparison to ground ERT and helicopter EM data shows the applicability of the methodology. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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