Alaska University Transportation Center PROJECT - Institute of ...
Alaska University Transportation Center PROJECT - Institute of ...
Alaska University Transportation Center PROJECT - Institute of ...
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Report <strong>of</strong> activities – Geophysical investigation at 9-Mile Hill study site 10<br />
Figure 9: Capacitive-coupled resistivity (CCR) system: the OhmMapper TR5 made by<br />
Geometrics and owned by the CRREL.<br />
Table 1: Electrode cable and dipole lengths, spacing and n factor between the dipoles,<br />
and theoretical depth <strong>of</strong> investigation for each run <strong>of</strong> the CCR-ERT survey.<br />
Run Electrode<br />
cable length<br />
(m)<br />
Dipole<br />
length<br />
(m)<br />
Spacing between the<br />
transmitter dipole and<br />
the 5 receiver dipoles<br />
(receiver number)<br />
(m)<br />
n factor<br />
between<br />
the dipoles<br />
Theoretical depth<br />
<strong>of</strong> investigation<br />
#1 2.5 5 5 (#1) 1 2.1<br />
7.5 (#2) 1.5 2.8<br />
10 (#3) 2 3.5<br />
12.5 (#4) 2.5 4.2<br />
15 (#5) 3 4.9<br />
#2 5 10 5 (#1) 0.5 3.5<br />
10 (#2) 1 4.9<br />
15 (#3) 1.5 6.3<br />
20 (#4) 2 7.7<br />
25 (#5) 2.5 9.1<br />
#3 5 10 25 (#1) 2.5 9.0<br />
30 (#2) 3 11.0<br />
35 (#3) 3.5 13.0<br />
40 (#4) 4 15.0<br />
45 (#5) 4.5 17.0<br />
#4 5 10 50 (#1) 5 14.0<br />
55 (#2) 5.5 16.0<br />
60 (#3) 6 18.0<br />
65 (#4) 6.5 20.0<br />
70 (#5) 7 22.0<br />
(m)
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