18 • ASIAN TIMBER • JULY/AUGUST 2003
M
ain
F
eature
One of the strategies for encouraging Sustainable Forest Management (SFM)
is the promotion of better logging practices such as those commonly referred to
as “Reduced Impact Logging” (RIL). This planning and operational strategy is
based on the recognition that improving harvesting practices is an
absolutely essential element of achieving SFM.
T
he conventional approach to logging
as still practiced by most concessions
in Southeast Asia, which involves
felling and log extraction usually relatively
unplanned, results in a very high level of
impact, especially to the residual trees which
should be the basis for the next cutting cycle.
It also results in excessive machine
movements that disturb the soil and destroy
forest vegetation. Excessive soil disturbance
can result in major soil erosion and
sedimentation of the forest streams with
associated negative impacts.
RIL is a series of techniques which, when
taken together, make up a comprehensive
management strategy. This strategy takes
planning of the extraction process to the
individual tree level. It emphasises the
adoption of standards and operating
procedures, which will lead to a greater
awareness and a more effective
implementation of the harvesting
activities.
Some extra costs are incurred but
researchers agree that significant and
immediate financial benefits
-
improved
efficiency or production cost savings
-
can
be had from better planning, field
preparation and supervision. By
minimising damage to the forest during
the initial harvesting activity, long-term
benefits such as an equal or better second
harvest can be expected.
Foresters have to get RIL to achieve
SFM
The connection between the
implementation of RIL and the
achievement of SFM is quite
straightforward. It starts with the
recognition that under most tropical forest
jurisdictions, the regulatory and/or
enforcement capabilities have been
inadequate in ensuring that forests are left
in good enough condition to ensure the
maintenance of all forest values.
In Indonesia, for example, natural forests
are managed under a 35-year cutting cycle.
Harvesting is regulated using a minimum
diameter limit of 50 cm (60 cm for limited
production areas). It is assumed that each
hectare will have at least 25 trees between
the diameters of 20 to 49 cm prior to felling
and it is further assumed that sufficient
numbers of these trees will be retained to
Reducing the damage
to the forest
By A.W. Klassen
Reducing the damage
to the forest
Reducing the damage
to the forest
One of the strategies for encouraging Sustainable Forest Management (SFM)
is the promotion of better logging practices such as those commonly referred to
as “Reduced Impact Logging” (RIL). This planning and operational strategy is
based on the recognition that improving harvesting practices is an
absolutely essential element of achieving SFM.
By A.W. Klassen