GNGTS 2015 - Atti del 34° Convegno Nazionale

Moreover, according to our preliminary results the depth of the top of the marls could occasionally intersect engineering works across or below the Po riverbed. The information we obtained, still under process and interpretation, were gathered in a half a day campaign, involving roughly eight people and two boats. Even at this stage of work, considering that the full implication of our findings is still to be exploited, these results seems of interest and another survey along other 5 km of the Po River, to the north of the one presented, is going to be planned. Acknowledgements. The authors wish to thank the “Direzione infrastrutture e mobilità, servizio ponti, vie d’acqua ed infrastrutture” of the Turin municipality and the “Società canottieri Cerea” for their essential logistic support and Diego Franco for his work during data acquisition. References AllenD. andMerrickN.; 2007: Robust 1D inversion of large towed geo-electric array datasets used for hydrogeological studies. Explor. Geophys. (Collingwood, Aust.) 38, 50–59. Auken E. and Christiansen A.V.; 2004: Layered and laterally constrained 2D inversion of resistivity data. Geophysics 69, 752–761. Boano P., Forno M.G. & Lucchesi S. (2004) – Pleistocene deformation of the Collina di Torino inferred from the modelling of their fluvial succession. – Il Quaternario, 17 (1/2): 145-150. Bortolami G.C., Crema G.C., Malaroda R., Petrucci F., Sacchi R., Sturani C. and Venzo S.; 1969: Foglio 56 ‘Torino’ della Carta Geologica d’Italia alla scala 1:1000.000 . IIa ed. Roma: Servizio Geologico d’Italia Castellarin A.; 1994: Strutturazione eo- e mesoalpina dell’Appennino settentrionale attorno al nodo ligure. Studi Geologici Camerti, special volume CROP 1–1, 99 –108. Colombero C., Comina C., Gianotti F. and Sambuelli L.; 2014: aterborne and on-land electrical surveys to suggest the geological evolution of a glacial lake in N Italy. Journal of Applied Geophysics, 105, 191-202, DOI: 10.1016/j.jappgeo.2014.03.020. Festa A., Boano P., Irace A., Lucchesi S., Forno M.G., Dela Pierre F., ... Piana F.; 2009: Foglio 156 ‘Torino Est’ della Carta Geologica d’Italia alla scala 1:50.000 . APAT, Agenzia per la Protezione dell’Ambiente e per i Servizi Tecnici- Dipartimento Difesa del Suolo, Roma. Forno M.G., Ben G., Boano P., Boero V. & Compagnoni R. (2002) – Lembi di depositi fluviali provenienti dai bacini alpini nordoccidentali sulla Collina di Torino presso Villa Gualino (NW Italy) – Il Quaternario, 15 (2): 175-185. Forno M.G. & Lucchesi S. (2005) – La successione fluviale terrazzata pleistocenica dei versanti occidentale e nordoccidentale della Collina di Torino. – Il Quaternario, 18 (2): 123-134. Forno M. G. and Lucchesi S.; 2015: Relicts of the Pleistocene Po Plain on the estern and Southern slopes of Turin Hill (N Italy) , Journal of Maps, DOI:10.1080/17445647.2015.1027481 Loke M.H. and Lane J.W.; 2004: Inversion of data from electrical resistivity imaging surveys in water-covered areas. Explor. Geophys. (Collingwood, Aust.) 35 (4), 266–271. Mosca P.; 2006: Neogene basin evolution in the estern Po Plain (N Italy): Insights from seismic interpretations, subsidence analysis and low (U-Th)/He thermochronology (Ph.D. Thesis). Amsterdam, The Netherlands: Vrije University, 190 pp. Sambuelli L. and Butler K.E.; 2009: Foreword. Special Issue on High Resolution Geophysics for Shallow ater , Near surface Geophysics, 7, pp. 3-4. 82 GNGTS 2015 S essione 3.2 Direct Interpretation of Surface Waves for 2-D and 3-D subsurface imaging S. Bignardi, N. Abu Zeid, G. Santarato Dip. di Fisica e Scienze della Terra, Universita degli studi di Ferrara, Italy Introduction. The soil stiffness is routinely evaluated by direct investigation, using geotechnical tests such as CPT-CPTu, SPT. While this approach allows retrieving detailed and reliable information, the procedure is invasive and the result is punctual hence of limited spatial extension. Moreover, the costs of a survey quickly grow with the number of probes. A low