International Journal of Geophysics / 2012 / Article / Fig 8

Research Article

Implications of Self-Potential Distribution for Groundwater Flow System in a Nonvolcanic Mountain Slope

Figure 8

Numerical modeling of SP profiles along slopes. (a) Model A with homogeneous subsurface structure. (b) Model B with constant infiltration through both a less permeable zone (gray) and surroundings. (c) Model C with heterogeneous infiltration outside of an impermeable zone (gray). In all three models, diamonds, circles, and rectangular dots indicate electric current sources with intensity of 0.004, 0.002, and 0.001 A, respectively. Solid and open symbols mean negative and positive polarities, respectively. Arrows indicate assumed flow directions. SP profiles shown in (d) and (e) are calculated along the thick line portion on the slope for each case. (d) Calculated SP from respective current sources. The abbreviations are as follows: IF: inflow, OF: outflow, and VZ: vadose zone. (e) Resultant SP profiles from three models against altitude.

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