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brd
observed in the vicinity of a resistive (
S
1
/
S
1
Fig. 7.35
Apparent-resistivity curves
=
1
/
16)
or conductive (
S
1
/
S
1
brd
(
S
1
/
S
1
)
=
brd
(
S
1
/
S
1
). The observation is carried out
=
16) inclusion,
at the site
x
=
0
,
y
=
1
.
5
b
. Model parameters:
2
/
1
=∞
,
3
/
1
=
0
,
h
2
/
h
1
=
20
.
Curve
parameter:
a
/
b
=
⊥
and
=
, which refer
inclusion is connected with the limit curves
yx
xy
to the
H
−
and
E
−
polarized fields respectively. In the case of a resistive inclusion
(
S
1
/
S
1
=
yx
-curve merges with the
S
1
-line, while its descending branch lies far above the
h
-line. At the same time the
ascending branch of the longitudinal
1
/
16) the ascending branch of the transverse
xy
-curve lies far below the
S
1
-line, while its
descending branch merges with the
h
-line. In the case of a conductive inclusion
(
S
1
/
S
1
=
yx
-curve has no ascending branch, while its descend-
ing branch lies far below the
h
-line. At the same time the ascending branch of the
longitudinal
16) the transverse
xy
-curve lies above the
S
1
-line, while its descending branch merges
with the
h
-line. With decreasing
a
/
b
, the lateral flow-around and current-gathering
