SYSTUM - 1
SYSTUM-1 is a prototype simulator designed to simulate growth of young
plantations in northern California and southern Oregon (Ritchie
and Powers 1993-1.4MB). This is the result of a cooperative effort to produce
a simulator geared towards young stand forecasts and the particular problems
presented in simulating systems with both trees and shrubs. Data for parameter
estimation were provided by private landowners, as well as the Forest Service
and Bureau of Land Management.
Current Version Number: 2.14 Download Now
Note: Version 2.14 might require administrative privledges to run correctly depending on your operating system. Contact Martin W. Ritchie with questions. If the download works correctly it will install the associated files under "C:\systum1" - folder.
Requirements: IBM compatible computer with DOS 3.0/Windows 3.1
or later versions and 400 K of RAM. A math coprocessor is not required
but will speed execution substantially.
Changes from Version 2.02 to Version 2.14: Version 2.14 has an
option to output 3 different FVS-type files: WESSIN, SORNEC, and Klamath.
The only differences between these three different files is in the species
conversions. The actual format of the file is the same regardless of the
variant of FVS.
The read format for these files is:
A companion file is also written out with the FVS treelist file. This companion
file is a FVS keyword file and it contains the basic keywords necessary
for a FVS run. It is likely that the user will need to modify this file
for an actual run with the user's specification. I recommend that users
specify the file name with an extension of .KEY.
Plot number........................... I4
Record number......................... I3
Expansion factor (trees per acre)... F6.0
Tree history (always 1)............... I1
Species Code (two letter char.)....... A3
Diameter at breast height (inches).. F4.1
Total tree height (feet)............ F3.0
Crown Ratio Code (integer 1-9)........ I1
We have also modified the default SDI maximum for ponderosa pine to
SYSTUM-1 DLL Download Now
Note: Users of the DLL are on their own; we do not provide any support
for users of the DLL. The DLL was created by Jeff Hamann at Oregon State
University. The DLL self-extracting zip file includes a spreadsheet with
an example macro for executing the simulator. The DLL files should be placed
in the Windows System directory. The spreadsheet should be placed in some
working directory where the user has data presumably.