Three methods of deriving advanced dynamic site equations
demonstrated on inland Douglas-fir site curves
Cieszewski CJ
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
31 (1): 165-173 JAN 2001
Abstract:
With two examples of five-parameter, fixed-base-age site index and height
growth equations, I demonstrate three methods for deriving dynamic equations
that are base-age invariant and use only three parameters. These are initial
condition difference equations that compute appropriate heights at all base
ages and provide compatible height and site index values from one common
equation. Despite having fewer parameters, they can model a broader selection
of curves than the original equations. The new equations are applicable for all
situations in which the original equations could be applied. Methods
demonstrated in this paper can enhance the development of all recursive and
otherwise implicitly defined equations used for modeling of height, diameter,
basal area, volume, number of trees per hectare, and investment yields.
Author Keywords:
KeyWords Plus:
DOMINANT HEIGHT GROWTH, INDEX CURVES, BRITISH-COLUMBIA, LODGEPOLE PINE, PLOT
DATA, MODEL, PARAMETERS, SWEDEN, PLANTATIONS, PREDICTION
Addresses:
Cieszewski CJ, Univ Georgia, Sch Forest Resources, Athens, GA 30602 USA
Univ Georgia, Sch Forest Resources, Athens, GA 30602 USA
Publisher:
NATL RESEARCH COUNCIL CANADA, OTTAWA
IDS Number:
395TN
ISSN:
0045-5067