Rapid bathymetric surveys in marine volcanic areas: A case study in panarea area |
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| Affiliation: | 1. Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna Murata 605, 00143 Rome, Italy;2. Ludwig-Maximilians-Universität München (LMU), Department of Earth & Environmental Sciences, Theresienstr. 41, 80333 Munich, Germany;3. Laboratoire GéoSciences Réunion, Université de la Réunion, Institut de Physique du Globe de Paris, Sorbonne Paris-Cité, CNRS UMR 7154, 15 Avenue René Cassin, CS 92003, 97744 Saint-Denis, La Réunion, France;4. Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Piazza Roma 2, 95125 Catania, Italy;5. Instituto de Ciencias de la Tierra Jaume Almera-Consejo Superior de Investigaciones Científicas (ICTJA-CSIC), C/Lluís Solé i Sabarís s/n, 08028 Barcelona, Spain;6. Department of Marine Geosciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA;7. Istituto Nazionale di Geofisica e Vulcanologia, Via Ugo La Malfa, 153, 90146 Palermo, Italy;8. Eni Angola, Avenida Lenine 58, Luanda, Angola;9. Observatoire Volcanologique du Piton de la Fournaise, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ. Paris Diderot, CNRS UMR 7154, F-97418 La Plaine des Cafres, La Réunion, France;1. Dept. of Geological and Mining Engineering and Sciences, Michigan Technological University, 1400 Townsend Dr, Houghton, MI 49931, USA;2. Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, Honolulu, HI 96822, USA |
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| Abstract: | The Differential Global Positioning System technique (DGPS) and an echo-sounding gear, both managed by a portable computer, were used on a small boat with the aim to perform rapid bathymetric surveys in shallow water in the still active volcanic area of the Panarea island. Preplanned routes were driven by a real time navigation software that allowed to perform several sections of the sea floor across the caldera in short time and high accuracy. Planar coordinates and depths were obtained with average accuracies of ±30cm and ±10cm respectively. Finally a Marine Digital Elevation Model (MDTM) was produced which allowed a detailed picture of the seafloor and showed the spatial distribution of the active gas ventings of this submarine volcanic area, located in the volcanic arc of the Aeolian islands (Southern Italy). |
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