Environmental Engineering Reference
In-Depth Information
Guidance for assessment of performance
features
vegetation coverage. This is easily inspectable
through a visual inspection. As this PF is only
linked to the 'overtopping leading to breach' fail-
ure mode, the inspector is only required to check
the vegetation coverage on the outer slope.
The flowchart shown in Figure 6.6 is used to
assess the condition relating to animal burrowing
Some examples of the flowcharts used for guid-
ance in assigning condition to the PFs are given in
this section.
Figure 6.5 is the simplest of the set of flowcharts
relating to embankments as it is an assessment of
Assess for state of
vegetation cover
Is vegetation cover
completely missing
No
Are there significant and
extensive bare patches?
No
Are bare patches of
vegetation present?
No
Ye s
Ye s
Is vegetation heavily
overgrown or non-uniform
(e.g. presence of patches of
moss)?
No
Ye s
Ye s
Condition = 1
Condition = 2
Condition = 3
Condition = 4
Condition = 5
Fig. 6.5
Flowchart to assess the condition of vegetation coverage for an earth embankment.
