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Near Surface 2006 - 12th EAGE European Meeting of Environmental and Engineering Geophysics
- Conference date: 04 Sep 2006 - 06 Sep 2006
- Location: Helsinki, Finland
- ISBN: 978-90-73781-62-7
- Published: 04 September 2006
141 - 142 of 142 results
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High Resolution Methods for Detecting the Moorish Moat Beneath La Lonja (15th c, Valencia, Spain)
This work shows the geophysical study carried out at La Lonja de los Mercaderes of Valencia (15th c. Spain), which was declared a World Heritage site in 1996 by UNESCO. The main objective has been to determine the exact outline of the Moorish moat and map it by using two geophysical techniques: Gravimetry and GPR. The study has been carried out as part of the Project for the Restoration and Cleaning of the building. Gravimetric and GPR studies were conducted in two and three areas, respectively. The correlation and modelling of the results of these techniques has lead us to conclude that the moat is in fact beneath La Lonja, showing its outline and dimensions. Moreover, this study also allows us to assume that in some areas the moat is partially filled in. The results obtained in this survey are a good example of combining high resolution methods, i.e. GPR and microgravimetry, as an efficient and respectful tool in cultural Heritage. This combination of techniques could help to avoid destructive actions both in excavations works and in restoration projects as well as in the rehabilitation and cleaning of historical buildings, specially in World Heritage Sites.
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Effect of Electromagnetic Soil Parameters on Early-Time GPR Signals
Authors E. Pettinelli, G. Vannaroni, B. Di Pasquo, S. Bravi, E. Mattei, A. De Santis, D. J. Redman and P. A. AnnanIn the present work, a comparison between Time Domain Reflectometry (TDR) and Ground Penetrating Radar (GPR) measurement on a test site is performed. The finale scope of the experimental study was to explore the possibility to develop a new approach to water content estimation, based on the analysis of the GPR early-time response. Instantaneous amplitude signal of the first 8 ns have been compared with electrical parameters (and dc) extracted from TDR measurements. The tests were conducted in a specifically designed site, in which the soil water content could be varied. The results show a good correlation between the GPR instantaneous amplitude data and soil electromagnetic properties.
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