Forest modelling

[william@ldi.dm.ufscar.br]

To system dynamics community,

I would like to know if anyone has worked with Forest Modelling, dealing
with the forest growth and the factors relationed with the growth. Do you
know where I can get information about this
problem?
Please, contact me by e-mail: william@ldi.dm.ufscar.br.
Thank you,
William Hajime Yonenaga

[Wolfgang Schade]

Dear William,

in Germany Prof. Bossel simulated the so called "Waldsterben" (dying
of German forests because of air pollution that causes acidification,
eutrophication and other related issues).
I think he created a sophisticated system dynamics model to explain
the interrelationships of all influences for forest growth and dying.
And he published it in a book (probably also in some articles):

Bossel, Hartmut
Dynamik des Waldsterbens : mathematisches Modell und Computersimulation,
edited by H. Bossel .... - Berlin ; Heidelberg : Springer, 1985. - VII, 265
pages,
ISBN 3-540-15475-2, 0-387-15475-2

The book is written in German and I do not know if there is a an English
version available.

Best regards

Wolfgang Schade




### ---------------------------------------------------------- ###
Wolfgang Schade


Institut fuer Wirtschaftspolitik und Wirtschaftsforschung (IWW)
Universitaet Karlsruhe, Germany
eMail: wolfgang.schade@iww.uni-karlsruhe.de
fon: +49 (0) 721 608-4371 fax: +49 (0) 721 34613
### ---------------------------------------------------------- ###

["Bob Cavana"]

hi William

i have had some involvement with forestry modelling that
you may find useful.

i did my PhD research at the University of Bradford
Management Centre with Prof Geoff Coyle in the early
80s and the following were produced :

Cavana, R.Y. 1983. Managing the Plantation Forests in
New Zealand: a system dynamics study in the design of
robust policies... Unpublished Ph.D. Thesis. University of
Bradford, England. 400pp

Cavana, R.Y. and R.G. Coyle. 1984. A Policy Analysis
Model for New Zealands Plantation Forestry System.
N.Z. Journal of Forestry. 29(1). pp24-50

Geoff Coyle refers to this work in his recent book (in
Chapter 10, pp 309-314). Also a full listing of the
model(s) are provided on the computer disk with his
book:

R.G.Coyle (1996). System Dynamics Modelling: a
practical approach. Chapman Hall, London

we found the earlier work by Jorgen Randers et al
(1979) and Steven Boyce (1977, 1979, 1980) very
helpful for our research:

Randers, J., L.Stenberg & K.Kalgraf (1979) The forest
sector in transition, Resource Policy Group, Oslo,
Norway (GRS 93E3)

Boyce, S.G (1977) Management of Eastern Hardwood
forests for multiple benefits (DYNAST - MB). USDA
Forest Service, Southeast, For.Exp.Stn,
Asheville, NC, USA (USDA For serv res papers, SE -
168 (in 1977) , SE-184 (in 1978), SE - 204 (in 1980)

i hope these sources are useful. please contact me if i
can be of further assistance.

i look forward to meeting you at the forthcoming
International System Dynamics Conference to be held in
Wellington, New Zealand on 20--23 July 1999.

please see our web site for full details:
http://www.vuw.ac.nz/gsbgm/isdc99

i would be delighted to meet you and your colleagues at
the conference and discuss our work with forestry SD
modelling with you

regards, Bob
Bob Cavana
From: "Bob Cavana" <Bob.Cavana@vuw.ac.nz>
Conference Chair, ISDC99