HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via ISI Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by Sailhac, P. Articles by Marquis, G. Search for Related Content PubMed Articles by Sailhac, P. Articles by Marquis, G. GeoRef GeoRef Citation Agricola Articles by Sailhac, P. Articles by Marquis, G. Related Collections Soil Methods/Instrumentation Other Geophysical Methods Infiltration

Electrical Streaming Potential Measured at the Ground Surface

Forward Modeling and Inversion Issues for Monitoring Infiltration and Characterizing the Vadose Zone

Eacute;quipe de Proche Surface, École et Observatoire des Sciences de la Terre–Institut de Physique du Globe de Strasbourg (CNRS UMR7516) 5, rue René Descartes– F-67084 Strasbourg (FRANCE)

View larger version (14K): [in a new window]   Fig. 1. Plots of Russo's model of effective saturation vs. pressure head for Mualem's parameter m = 0.5 in Eq. [13] (left), and the shift in the matric flux potential caused by a non-zero background effective saturation (right). The cross is for a soil in which effective saturation before infiltration is Se0 = 0.75; The corresponding shift relative to the analytic expression of in Eq. [11] is 0 = 0.11KS/ (for m = 0.5).

View larger version (53K): [in a new window]   Fig. 2. Cross-sections of four source strength infiltration simulations ( = 12 m–1 and Se0 = 0.6, and q/KS ranges from 1 mm to 10 cm), showing effective water saturation Se and electrokinetic potential V (mV) vs. depth (from 0 to 60 cm), and its first- and second-order horizontal derivatives at a depth of 10 cm (horizontal electric field Ex [mV cm–1] and its derivative E'x [mV cm–2]). Please note that the distributions are symmetric with respect to the x = 0 vertical plane, and that V and E'x are even and Ex is odd.

View larger version (26K): [in a new window]   Fig. 3. Plots of the electric field Ex maxima vs. q/KS. Results are for a depth of 10 cm, and for constant Gardner soil parameters equal to 4, 8, 12, or 16 m–1 (top), and constant background effective water saturation Se0 equal to 0.6, 0.7, or 0.8 (bottom). Note that the maxima increase with increasing q/KS and , and decrease with increasing Se0.)

View larger version (24K): [in a new window]   Fig. 4. Sensitivity of the maximum SP gradient to (m–1), q/KS (m), and Se0.