Environmental Assessment
Volume C-4.5
Slurry Pipeline
Protected Areas
Ambatovy Project
163
January 2006
•
the results of hydrology and water quality analyses that indicate how
water sedimentation will be affected in the LSA.
Geographic Information System (GIS) software was used to conduct the spatial
analysis of impacts to protected areas.
4.5.5.2 Assessment Criteria
The assessment criteria presented in Table 4.5-1 were used to evaluate impacts
on protected areas.
Table 4.5-1 Impact Description Criteria for Protected Areas
Direction
Magnitude
Geographic
Extent
Duration
Reversibility
Frequency
positive:
enhanced
management of
protected areas
neutral:
no
change in
protected areas
negative:
degradation of
protected areas
negligible:
no
measurable effect
low:
physical
effects on 1% or
less of a protected
area and/or minor
indirect impacts
moderate
: physical
effects of 10% or
less of a protected
area and/or
moderate indirect
impacts
high
: physical
effects of more than
10% of a protected
area and/or high
indirect impacts
local:
effect
restricted to the
LSA
regional:
effect
extends beyond
the LSA, into the
RSA
beyond
regional:
effect
extends beyond
the RSA
short
term:
<3
years
medium
term:
3 to
30 years
long term:
>30 years
reversible or
irreversible
low:
occurs
once
medium:
occurs
intermittently
high:
occurs
continuously
4.5.5.3 Mitigation
The pipeline route will avoid Mantadia National Park and will cross the planned
Mantadia-Zahamena corridor only in an area that has been previously deforested.
The pipeline route will follow an existing, disturbed RoW through the
Torotorofotsy Ramsar site. Stringent erosion control measures along this route
will be implemented to mitigate any siltation of the adjacent wetlands during the
construction period.
