Результаты исследований: Материалы конференций › материалы › Рецензирование
Relation of SIP relaxation time of sands to salinity, grain size and hydraulic conductivity. / Kemna, A.; Münch, H. M.; Titov, K.; Zimmermann, E.; Vereecken, H.
2005. Работа представлена на 11th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of the EAGE, Near Surface 2005, Palermo, Италия.Результаты исследований: Материалы конференций › материалы › Рецензирование
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TY - CONF
T1 - Relation of SIP relaxation time of sands to salinity, grain size and hydraulic conductivity
AU - Kemna, A.
AU - Münch, H. M.
AU - Titov, K.
AU - Zimmermann, E.
AU - Vereecken, H.
N1 - Copyright: Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - The spectral induced polarisation (SIP) characteristics of sedimentary rocks contain structural information which potentially can be linked to flow and transport parameters, such as hydraulic conductivity. We examined this connection for pure, saturated sands by measuring SIP spectra of sands with different grain size and pore water electrical conductivity. For each spectrum, relaxation times, chargeabilities and Cole-Cole exponents were determined for identified dispersion ranges under the assumption of superimposed Cole-Cole model responses. We here focus on the results concerning the relaxation time of the observed lowfrequency dispersion. This relaxation time shows a decrease with increasing pore water electrical conductivity, which is supposed to be associated with a decrease of the electrical double layer thickness. With increasing grain diameter an increased relaxation time is observed, in accordance with theory. Importantly, we find a correlation between the lowfrequency relaxation time and the hydraulic conductivity, which is of high practical relevance.
AB - The spectral induced polarisation (SIP) characteristics of sedimentary rocks contain structural information which potentially can be linked to flow and transport parameters, such as hydraulic conductivity. We examined this connection for pure, saturated sands by measuring SIP spectra of sands with different grain size and pore water electrical conductivity. For each spectrum, relaxation times, chargeabilities and Cole-Cole exponents were determined for identified dispersion ranges under the assumption of superimposed Cole-Cole model responses. We here focus on the results concerning the relaxation time of the observed lowfrequency dispersion. This relaxation time shows a decrease with increasing pore water electrical conductivity, which is supposed to be associated with a decrease of the electrical double layer thickness. With increasing grain diameter an increased relaxation time is observed, in accordance with theory. Importantly, we find a correlation between the lowfrequency relaxation time and the hydraulic conductivity, which is of high practical relevance.
UR - http://www.scopus.com/inward/record.url?scp=84898663684&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:84898663684
T2 - 11th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of the EAGE, Near Surface 2005
Y2 - 4 September 2005 through 7 September 2005
ER -
ID: 75062548