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ACORn (A Comprehensive Ozark Regeneration simulator) is a computer program
that can help forest managers predict the number and species of trees that
will regenerate following harvest in upland oak stands in the Ozark
Highlands of Missouri and adjacent states.
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ASPEN is an empirical simulation model that projects the growth and yield
of aspen (Populus tremuloides and P. tremula) stands from establishment to
breakup. The model incorporates the system of equations developed from
growth and yield data from throughout the range of P. tremuloides and P.
tremula; the model should thus be applicable throughout the circumboreal
region. The model runs on an annual time step and predicts total yields in
number of trees, basal area, and biomass, as well as merchantable yields
in cubic feet and cords for user-specified utilization standards, and in
Scribner board feet. Outputs are in the form of stand tables and stocking
guides. The model supports silvicultural operations such as thinning, as
well as management for multiple products.
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This program produces tables and maps from the USDA Forest Service's
Forest Inventory and Analysis Data Base (FIADB).
The user inputs the following information:
| 1. |
geographic area of interest (state/county retrieval or radius
retrieval) |
| 2. |
attribute of interest (timberland area, number of trees,
growing-stock volume, etc.) |
| 3. |
optional filters (for restricting the query to a specific ownership,
species, etc.) |
| 4. |
classification variables to be used for columns and rows and the web application generates the resulting table. If the user
selects County or Congressional District as the row variable a shaded
county map is generated.
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Forest Inventory and Analysis (FIA) research units have participated in
establishing a nationwide database of common forest resource data. For
detailed information view The Eastwide Forest Inventory Data Base: User's
Manual. and/or The Westwide Forest Inventory Data Base: User's Manual.
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The GIS-FIA Model was
developed by Michigan Technological University in cooperation with the
North Central Forest Inventory and Analysis (FIA) research unit. The
GIS-FIA Model is a geographic information system program that summarizes
FIA data. The model runs from a project file in ArcView under the
Windows98/NT operating system.
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HARVEST is a timber harvest allocation model that was constructed to allow
the input of specific rules to allocate forest stands for even-age harvest
(clearcuts and shelterwood) and group selection, using parameters commonly
found in National Forest Plan standards and guidelines. The model produces
landscape patterns that have spatial attributes resulting from the initial
landscape conditions and potential timber management activities. Modeling
this process allows experimentation to link variation in management
strategies with the resulting pattern of forest openings and the
distribution of forest age classes.
HARVEST Lite is the educational version of the software.
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Fast and flexible program for economic analysis of long-term,
on-the-ground resource management projects for forest managers. (Windows
version)
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A red pine growth and analysis spreadsheet for the Lake States.
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TWIGS is a DOS program used to simulate growth and yield for forests in
the North Central region. It also includes management and economic
analysis components. Two variants are available: Central States (Indiana,
Illinois, and Missouri) and Lake States (Michigan, Minnesota, and
Wisconsin). See Gen. Tech. Rep. NC-125 (Miner et al. 1988. A guide to the
TWIGS program for the North Central United States. Gen. Tech. Rep. NC-125,
St. Paul, MN: USDA Forest Service, North Central Forest Experiment
Station, 105p.) for details on running the program. |
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