GNGTS 2014 - Atti del 33° Convegno Nazionale

GNGTS 2014 S essione 3.2 165 opposite sign and we added a new function, which takes into account also of the amplitude of the above-described membrane effect as expressed in Eq. (5): (5) where η 2 : is Chargeability and τ 2 : is relaxation time for membrane polarization, α: is a coefficient referred to attenuation. �� ���� ���� ��������������� ��� ������������� ������ �� ��� �� �������� In this way, re-interpreting the low-frequency curves of TEM 3, resulted in a 1D model that is consistent with the “normal” soundings, as is shown in Tab. 3. Obviously, TEM1 and 2 show coherent 1D models with TEM3. Acknowledgements. Authors acknowledge HERA S.p.A. for authorizing the access to the Varana test site where groundwater collectors are found. Province of Ravenna, partner of the project Cities on Power,, implemented through the Central Europe Program Co-Financed by the ERDF is also acknowledged for the financial support of the geophysical survey at RioloTerme test site. References Abu-Zeid N. and Santarato G.; 2004: On the correspondence between resistivity and texture of loose sediments, saturated with salt water. Near Surface Geophysics, 2 , 144-149. Antonov E.Yu., Shein A.N.; 2008: Improving inversion quality for IP-affected TDEM data . Russian Geology and Geophysics, 49 , 790–802. Atekwana E.A. and Atekwana E.A.; 2010: Geophysical signatures of microbial activity at hydrocarbon contaminated sites: a review. Surveys in Geophysics, 31 , 247-283. Barker R.D.; 1989: Depth of investigation of collinear symmetrical four-electrode arrays. Geophysics, 54 , 1031- 1037. Bleil D.F.; 1953: Induced polarization: a method of geophysical prospecting. Geophysics, 18 , 636–661. Iliceto V., Santarato G. and Veronese S.; 1982: An approach to the identification of fine sediments by Induced Polarization laboratory measurements. Geophysical Prospecting, 30 , �������� 331-347. Loke M.H. and Barker R.D.; 1996: Rapid least-squares inversion of apparent resistivity pseudosections using a quasi- Newton method. Geophysical Prospecting, 44 , 131-152. Ingeman-Nielsen T. and Baumgartner F.; 2006: CR1Dmod: AMatlab program to model 1D complex resistivity effects in electrical and electromagnetic surveys. Computers & Geosciences, 32 , 1411–1419. Marshall D.J. and Madden T.R.; 1959: Induced polarization, a study of its cases . ����������� Geophysics, 24 , 790–816. Papani G. and Zanzucchi G.; 1969: Le argille di Viano: nuove unita litostratigrafiche dell’Appennino emiliano . L’Ateneoparmense, Actanaturalia, 5, 19–28. Pelton, W.H., Ward, S.H., Hallof, P.G., Still, W.R. and Nelson, P.H.; 1978: Mineral discrimination and removal inductive coupling with multifrequency IP . Geophysics, 43 , 588–609. Schön J.H.; 1996: Physical properties of rocks:-fundamentals and principles of petrophysics .K. Helbig and S. Treitel Editors, Handbook of Geophysical Exploration – Seismic Exploration, vol. 18, Elsevier Scientific Ltd, pp. 583. Sidorov V.A, and Yakhin A.M.; 1979: Induced polarization occurred due to induction excitation .Izvestiya, Physics of the Solid Earth, 26 , 46-52. Sumner J.S.; 1976: Principles of induced polarization for geophysical exploration. Elsevier Scientific Ltd, pp.277. Walker, G.G. and Kawasaki K.; 1988: Observation of double sign reversals in transient electromagnetic central induction soundings. Geoexploration, 25 , 245-254. Zadorozhnaya, V.Yu.; 2008:Resistivity measured by direct and alternating current: why are they different? Advances in Geophysics, 19, 45-59. Zadorozhnaya V. and Maré L. P.; 2011: New model of polarization of rocks: theory and application . ActaGeophysica59, 262-295, DOI: 10.2478/s11600-010-0041-6s.