GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione 3.2 543 of analytical solutions, which describe the expected value of temperature at different depths in sediments affected by processes of heat transport by advection, it is possible to obtain quantitative information on the groundwater velocity. The velocity values found by thermal methods for P8 and P10 wells are comparable with the velocities introduced in the flow model for the Cantarana well filed, deducted by means of hydraulic properties (hydraulic conductivity K = 5·10 -5 m·s -1 and hydraulic gradient i = 0.1), validating the numerical model. On the contrary, the low groundwater flow velocities found for the well placed out of the Cantarana well filed suggest the piezometric map elaborated for the area and its hinterland is correct. All this information may improve the numerical flow model of Maggiore Valley well field, introducing in the hydrogeological models a warm horizontal flux, located in the Asti Sand at depths greater than 60 meters, with flow velocity of about 10 -6 m·s -1 , as highlighted by thermal logs. References Carraro F. (Ed.); 1996: Revisione del Villafranchiano nell’area-tipo di Villafranca d’Asti. Il Quaternario (It. Journ. Quatern. Sc.), 9 (1): 5–119. Castellaro S., Mulargia F., 2009: Vs30 estimates using constrained H/V measurements. Bulletin of the Seismological Society of America, Vol. 99, (2A): 761–773. Forno M.G., Gattiglio M., Comina C., Barbero D., Bertini A., Doglione A., Irace A., Gianotti F., Martinetto E., Mottura A., Sala B.; 2015: Stratigraphic and tectonic notes on the Villafranca d’Asti succession in type-area and Castelnuovo Don Bosco sector (Asti reliefs, Piedmont). Alpine and Mediterranean Quaternary, 28(1), 5-27 Gattiglio M., Forno, M.G., Comina, C., Doglione A., Violanti, D. and Barbero, D.; 2015: The involving of the Pliocene-Pleistocene succession in the T. Traversola Deformation Zone (NW Italy). Alpine and Mediterranean Quaternary, 28(1), 59-70. Ibs-von Seht M., Wohlenberg J.; 1999: Microtremor measurements used to map thickness of soft sediments. Bull. Seismol. Soc. America, 89, 250-259. Lasagna M., Caviglia C., De Luca D.A.; 2014: Simulation modeling for groundwater safety in an overexploitation situation: the Maggiore Valley context (Piedmont, Italy). Bull. Eng. Geol. Environ., 73,341–355. Pasquale V., Chiozzi P., Gola G., ,Verdoya M.; 2008: Depth-time correction of petroleum bottom-hole temperatures in the Po Plain, Italy. Geophysics, 73, 187–196 Pasquale V., Verdoya M., Chiozzi P.; 2010: Evaluation of heat and water flow in porosity permeable horizons. Boll. Geofis. Teor. Appl., 51, 361-371. Pasquale V., G. Gola, P. Chiozzi., Verdoya M.; 2011: �������������� ���������� �� ��� �� ����� ������ ������� �� Thermophysical properties of the Po Basin rocks. Geophy. J. Inter.. 186, 69-81. Pasquale V., Verdoya M., Chiozzi P.; 2014: Geothermics, heat flow in the lithosphere. Springer, Heidelberg, 119 pp. Verdoya M., Pasquale V., Chiozzi P.; 2008: Inferring hydro-geothermal parameters from advectively perturbed thermal logs. Inter. J. Earth Sc., 97, 333-344. Seismic tomography tests applied to a gravity dam P. Capizzi 1 , R. Martorana 1 , C. Pirrera 2 , A. D’Alessandro 3 , F. Bucalo 1 1 Dipartimento di Scienze della Terra e del Mare (DiSTeM) Università degli Studi di Palermo, Italy 2 Self-employed geologist 3 Istituto Nazionale di Geofisica e Vulcanologia, Centro Nazionale Terremoti, Roma, Italy The control of the safety assessment of a dam is largely dependent on knowledge of the mechanical parameters of the actual construction, as well as its geological substratum (Karastathis et al. , 2002). The application of geophysical methods can be used in existing dams to evaluate the materials (strength properties) and to verify if they match design expectations, as well as to contribute to the safety control (Bond et al. , 2000; Kepler et al. , 2000; Loperte et al. ,