Geoscience Reference
In-Depth Information
12.2
-13
-13
10.7
West
East
South
North
0
0
9.1
7.6
13
13
6.1
25
25
4.6
38
38
3.0
50
1.5
50
N
0.0
0.0
2.5
5.0
7.5
10.0
12.5
15.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
0.0
3.0
6.1
9.1
Distance (m)
12.2
15.2
Line Distance (m)
Line Distance (m)
(a)
(b)
(c)
12.2
10.7
-13
-13
9.1
West
East
South
North
0
0
7.6
6.1
13
13
4.6
25
25
3.0
38
38
1.5
50
50
N
0.0
0.0
2.5
5.0
7.5
10.0
12.5
15.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
0.0
3.0
6.1
9.1
Distance (m)
12.2
15.2
Line Distance (m)
Line Distance (m)
(d)
(e)
(f )
fIGURe 29.4
ElectroScience Laboratory (ESL) test plot
ground-penetrating radar (GPR) proiles and amplitude maps showing the effect of shallow hydrologic condi-
tions on drainage pipe detection; (a), (b), and (c) wet surface and water table raised 0.5 m above drainage pipes, and (d), (e), and (f) a very moist soil proile with pipes
totally drained of water.
