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Дата изменения: Tue Jun 22 13:40:02 1999 Дата индексирования: Tue Oct 2 00:57:16 2012 Кодировка: |
C-effect
has several particularities, which do it more dangerous, than P-effect:
a) The form of VES curve and consequently visible layers number changes;
b) On profile VES data C-effect shows itself on Rhoa cross-section
as dipping layer (fig.5b), and in the case of logarithmic scale along AO
axis it seems to be bent layer. c) when standard sounding technology is
used (four electrodes Schlumberger array and logarithmic step in distance
growth), C-effect results from A and from B electrodes occasionally and
irregularly only at the moments when current electrodes exactly hit NSI.
In this case the main sign of C-effect - its form - disappears. Case C
on fig.4 shows V-transformation for AMN array
with logarithmic step in distance growth. C-effect in this case loose its
regularity. d) On Rhoa cross-section C-effect is not distinctly
visible due to great changes in Rhoa level with distances (fig.5a).
To find and recognize C-effect the special technology of field measurements
and results visualization is needed (V-transformation).