Environmental Engineering Reference
In-Depth Information
Multilevel piezometers
5542
5185
1200
1200
FIGURE 12.10
Plan view sketch of the sheet-piled excavation (nominal dimensions in millimeters). (From
Or ica Ltd.)
Figure 12.11 illustrates the array of bundle piezometers and monitoring
wells within and immediately adjacent to the reactive iron barrier. Three
longitudinal transects (i.e., along the groundwater flow path) comprising
piezometers and nested wells at three depths were used to evaluate the
chemical composition of the groundwater. Three transects were installed
to evaluate whether “edge” effects were caused by differential permeability
Cross-section view
1.5 m
Ground
surface
Plan view
1
1.5
m
2
3
Nested wells
4
Sand backfill
Iron-reactive
barrier
Monitoring
well screen
5
6
Direction of
groundwater
flow
7
Multilevel
piezometers
Legend
Multilevel piezometers
8
Direction of
groundwater
flow
Monitoring well screen
Nested wells
9
FIGURE 12.11
Plan and cross-section views of monitoring locations in and adjacent to the pilot-scale reactive
iron barrier. (From Orica Ltd.) The groundwater table was approximately 1 m bgs.
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