I worked on a forestry modeling project about 15 years ago! (We also had
some exchange of ideas with Steve Boyce at the time). Our project was for
USDA and got later summarized in two papers:
"System Dynamics Methodology for Natural Forest Management: An Overview a=
nd
General Guidelines" (with Willard R. Fey), Forest Resources Systems
Institute, COMPILER, Vol.7, No.3, 1989, pp.4-16.
"System Dynamics Methodology for Natural Forest Management: An Applicatio=
n
to Wildlife and Fish Resource Management" (with Willard R. Fey), Forest
Resources Systems Institute, COMPILER, Vol.7, No.4, 1989, pp.4-19.
Let me know if you can not find them and want me to send you by mail.
(Also, Fey and Guiterrez published a book on Secondary Eco-system
Sucession, which you may find in the libraries)
Yaman Barlas
From: Yaman Barlas <ybarlas@boun.edu.tr>
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--
Yaman Barlas, Ph.D.
Prof. of Industrial Engg
Bogazici University,
80815 Bebek, Istanbul
Turkey. Fax. +90-212-265 1800. Tel. 90-212-263 1540; ext.2073
http://www.ie.boun.edu.tr/faculty/barlas
System Dynamics Society (http://www.albany.edu/cpr/sds/ )
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Forest Growth Modeling
Forest Growth Modeling
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
This is Andy Ford replying with two suggestions regarding the inquiry =
from William Hajime Yonenaga about system dynamics applied to forest =
growth: =20
First, a lot of work has been done by Steve Boyce, formerly of the =
School of Forestry (now the School of the Environment) at Duke. Steve =
is now retired, He wrote up some of his models in a workbook for his =
students at Duke using Dynamo. You can see his main model reconfigured =
in Stella as an exercise in Chapter 5 of my new book on Modeling the =
Environment. (see page 57 of the book, which can be previewed at=20
http:/www.islandpress.org/ford
Second, Chris Enyedy, a MS student in the Environmental Science Program =
at WSU, constructed a Stella model of forest recovery after a major =
change (such as Mt. St. Helens). The model focused on the "below =
ground" nutrients like ammonium and nitrates. The above ground forest =
was comprised of separate stocks for Red Alder, Douglas Fir, Red Cedar =
and Western Hemlock.=20
Andy Ford
Program in Environmental Science and Regional Planning
Washington State University=20
From: Andy Ford <forda@mail.wsu.edu>
Content-Transfer-Encoding: quoted-printable
This is Andy Ford replying with two suggestions regarding the inquiry =
from William Hajime Yonenaga about system dynamics applied to forest =
growth: =20
First, a lot of work has been done by Steve Boyce, formerly of the =
School of Forestry (now the School of the Environment) at Duke. Steve =
is now retired, He wrote up some of his models in a workbook for his =
students at Duke using Dynamo. You can see his main model reconfigured =
in Stella as an exercise in Chapter 5 of my new book on Modeling the =
Environment. (see page 57 of the book, which can be previewed at=20
http:/www.islandpress.org/ford
Second, Chris Enyedy, a MS student in the Environmental Science Program =
at WSU, constructed a Stella model of forest recovery after a major =
change (such as Mt. St. Helens). The model focused on the "below =
ground" nutrients like ammonium and nitrates. The above ground forest =
was comprised of separate stocks for Red Alder, Douglas Fir, Red Cedar =
and Western Hemlock.=20
Andy Ford
Program in Environmental Science and Regional Planning
Washington State University=20
From: Andy Ford <forda@mail.wsu.edu>