Application to the vadose zone - The Seismoelectric Method - page 222

Seismic supergather Seismoelectric supergather

Offset (m) Offset (m)

-50 -30 -10 10 30 50 -50 -30 -10 10 30 50

0 0

20 20

Se i smoelectric
conversion

40 40

60 60

80 80

100 100

120 120

140 140

160 160

180 180

200 200

(a) (b)

Figure 7.3 Seismic and seismoelectric supergathers (position 128 along the line, modified fromDupuis et al., 2007, reproduced with the
authorization from the SEG and the authors). a) Seismic supergather offset records. b) Seismoelectric supergather offset records.
( See insert for color representation of the figure .)

200

GPR

300

400

2

500

1

600

0 50 100 150 200 250 300

0
10
20
30
40
50
60
70
80

Seismoelectric

2

1

0 50 100 150 200 250 300

Distance (m)

Figure 7.4 Comparison between a GPR profile and a seismoelectric 300 m profile (modified from Dupuis et al., 2007, reproduced
with the authorization from the SEG and the authors). Variable elevation static delays were applied to the data to account for
the effect of elevation. Anomaly 1 corresponds to the water table, while anomaly 2 likely corresponds to a unit that might have a
high water content. ( See insert for color representation of the figure .)