Canadian Forest Service Publications

A guide to the STIM growth model. 1995. Bonnor, G.M.; De Jong, R.J.; Boudewyn, P.A.; Flewelling, J.W. Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC. Information Report BC-X-353.

Year: 1995

Issued by: Pacific Forestry Centre

Catalog ID: 4020

Language: English

Series: Information Report (PFC - Victoria)

Availability: Order paper copy (free), PDF (download)

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Abstract

The Stand and Tree Integrated Model (STIM) has been developed to make growth projections for inventory updates, for timber supply assessment, and for general management planning. It includes both a tree and a stand growth model component which make independent projections that subsequently are reconciled. A component for the projection of thinned stands is also included.

STIM is designed to operate on IBM® and compatible micro-computers. While the core of the program is written in FORTRAN, the user interface employs the Windows® environment: a main screen is presented to the user who makes choices related to data input, growth projections, management options, and output. STIM has been implemented for western hemlock using a data set of 1339 permanent sample plots containing 5304 measurement sets. The plots are located in the Pacific Northwest.

The core of STIM is comprised of the predicting equations. These have been validated individually and jointly, sensitivity analyses have been performed, comparisons have been made between STIM and other growth models, and corrections and improvements have been made.