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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7809

Authors: Rinaldi, A. P.*
Todesco, M.*
Vandemeulebrouck, J.
Revil, A.
Bonafede, M.
Title: Electrical conductivity, ground displacement, gravity changes, and gas flow at Solfatara crater (Campi Flegrei caldera, Italy): Results from numerical modeling
Title of journal: Journal of volcanology and geothermal research
Series/Report no.: 3-4/207(2011)
Publisher: Elsevier Science Limited
Issue Date: 2011
DOI: 10.1016/j.jvolgeores.2011.07.008
Keywords: Electrical conductivity
Abstract: Hydrothermal fluid circulation may cause measurable gravity changes and ground deformation. We extend our previous studies and increase the number of observable parameters to include gas temperature, the rate of diffuse degassing, the extent of the degassing area, and electrical conductivity. We have carried out simulations using TOUGH2/EOS2 of a large scale hydrothermal system, then we have calculated observables arising from changes in hydrothermal fluid circulation. Our results show that fluids affect many observable parameters generating detectable signals. However, a more detailed description of the shallow subsurface is necessary to properly calculate electrical conductivity. Studies at Solfatara volcano (Campi Flegrei caldera, Italy) highlight the presence of an unsaturated layer at depth and allow to determine the position of the water table. Then, we present results from a new, small scale simulation, focused on the crater, and carried out with a new, refined meshgrid taking into account the real topography. Aim of the work is to calculate a detailed electrical conductivity map and reproduce the main features of the Solfatara crater.
Appears in Collections:04.08.99. General or miscellaneous
Papers Published / Papers in press

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