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| Ministry of Forests and Range |
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| Inventory
Projection |
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Models
The main purpose of the Inventory Projection (IP) group
is to provide the necessary tools and support required to predict the
values a number of important forest stand parameters, such as volume,
for both current and future stand conditions.
The IP group developed the Variable Density Yield Prediction
(VDYP) model which has been used since 1993 to project (or grow) the
provincial inventory and to create yield tables for use in the Timber
Supply Review process. VDYP is a whole stand empirical yield model which
was designed to predict the average yield of unmanaged naturally regenerated
forests.
Over the years a number of improvements have been made to VDYP and
in 1999 work was commenced on a major revision and refitting. The new
version (VDYP7) is a growth and yield model incorporating the growth
information collected from permanent sample plots, it is expected to
be released for testing in 2006.
The
Ministry of Forests and Range website can provide more information on
growth and yield models
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