Forest Science Program

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Amabilis fir height-age and growth intercept models for British Columbia

Author(s) or contact(s): G.D. Nigh
Source: Forest Science Program
Subject: Growth and Yield
Series: Research Report
Other details:  Published 2009. Hardcopy is available.


The purpose of this project was to develop growth intercept and height-age models for amabilis fir (Abies amabilis Dougl. ex Forbes) on the coast of British Columbia. Twenty-eight stem analysis plots were established on Vancouver Island. These data were combined with data from 46 previously established stem analysis plots. The stem analysis data were converted into height-breast height age data and the site index was obtained from the data. A suite of 50 growth intercept models was developed, one model for each breast height age from one to 50. A height-age model based on the Hossfeld IV function was also developed. There were minor differences between the new height-age model and the height-age model currently in use. Therefore, implementation of the new height-age models should have minimal consequences on timber supply analyses and forest management decision making.

Funding for this project was provided by FIA-FSP.

Download Research Report 30 PDF file (348 KB)

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Updated February 25, 2010