Environmental Assessment
Volume E-6
Tailings Facility
Reclamation and Closure
Ambatovy Project
230
January 2006
planting Vetiver hedgerows will reduce soil loss up to 90% and water runoff up
to 60% (Grimshaw 1997).
6.3.2
Revegetation
Revegetation of disturbed surfaces is a key restoration objective in that the
vegetation provides sediment and erosion control and allows for future land uses.
Currently, it is believed that the general reclamation approach is best conducted
in four distinct conceptual phases, including:
•
water and erosion control;
•
soil preparation and revegetation;
•
planting native trees; and
•
inducing natural succession.
Note that decisions as to species mixes to use for re-vegetation will be influenced
by guidance of stakeholders as to end use goals. End use goals, however, will
need to recognize limitations associated with the nature of the tailings material,
mainly its physical properties. Consultation on end-use options will occur during
operations.
6.4
MONITORING
Post-closure monitoring will involve physical stability monitoring to identify
evidence and/or early indications of erosion and stability issues and/or safety
hazards, as well as a continuation of groundwater and surface water monitoring
for the same parameters as the operation phase. The frequency of this monitoring
will be determined based on the observed conditions.
