Chapter 12 Computer files used in the Chapter
FILE
FILE DESCRIPTION
In DPEMbase.zip (Daniel Pickett Ecosystem Management (DPEM) model files)
p1a.pol
p1b.pol
p2a.pol
p2b.pol
p3.pol
p4.pol
p5.pol
p6.pol
p7_08.pol
DpemRCM.xls
Dpem.prn
Dpem.rcm
DpemGraph.xls
Policy 1a model
Policy 1b model
Policy 2a model
Policy 2b model
Policy 3 model
Policy 4 model
Policy 5 model
Policy 6 model
Policy 7_08 model
An Excel spreadsheet used to construct the basic DPEM
RCM model. (If saved as a .WK1 file, it serves as
input to the SARA EQUATION program).
ASCII text file of the solutions to the 9 policy models
(listed above).
A text file containing the linear form of the DpemRCM
model, produced by the SARA EQUATION
program.
Excel spreadsheet showing the results of the 9 policy
models (listed above), with associated tables and
graphs.
In DPEM_DFC.zip (Daniel Pickett Ecosystem Management (DPEM) model desired
future condition analysis files)
Dpmp6a04.pol
Dpmp6a08.pol
Dpmp6a12.pol
Dpmp6b04.pol
Dpmp6b08.pol
Dpmp6b12.pol
Dpmp6c04.pol
Dpmp6c08.pol
Dpmp6c12.pol
DFCgraph.xls
Policy model for achieving structure A by decade 4.
Policy model for achieving structure A by decade 8.
Policy model for achieving structure A by decade 12.
Policy model for achieving structure B by decade 4.
Policy model for achieving structure B by decade 8.
Policy model for achieving structure B by decade 12.
Policy model for achieving structure C by decade 4.
Policy model for achieving structure C by decade 8.
Policy model for achieving structure C by decade 12.
Excel spreadsheet showing the results of the desired future
condition analysis, with associated graphs and
tables.
In DPEM_EE.zip (Daniel Pickett Ecosystem Management (DPEM) model ecologicaleconomic tradeoff study)
EEto2.pol
EEtoLIN.lin
EEto.xls
An example policy model with the objective of minimizing
the sum of (DVSUM - 0.01 NPV12). The rest of
the policy model is the desired future condition
policy Dpmp6b08.pol noted above. The coefficient
-0.01 can be systematically altered between -1.0 and
-0.0001 in a series of runs to develop a tradeoff
surface.
This is the complete linear equation model used in the
ecological-economic tradeoff analysis (EEtoLIN.lin
= EEto2.pol + Dpem.rcm).
Excel spreadsheet showing some results of a tradeoff
analysis.
In DPEM_HRV.zip (Daniel Pickett Ecosystem Management (DPEM) model historical
range of variability study)
HRVpol.pol
HRVlin.lin
HRVout.out
A sample policy model for historical range of variability
analysis. Note that the definition of deviation
ranges uses the same technique that you would use
to develop demand or supply curves for some output
from a linear model. This file is a starting point for
performing additional historical range of variability
analysis.
This is the complete linear equation file (HRVlin.lin =
HRVpol.pol + Dpem.rcm)
A text file comtaining the solution to HRVlin.lin.
The historical range of variability formulation defines two positive and two negative
ranges, and weights deviations heavier in the ranges further away from the target.
Note that in question 12-5, students are asked to reformulate this model so that it
encourages some variation in structure over time. One way to approach this is to define
three ranges of deviations on each side of the average structure target, and then weight the
range closest to the target and the range most distant from the target with larger weights
than the middle range. This should encourage a management plan that provides a
moderate range of structural variation.
The model can be used as is to study how different weights on devaitions within a range
would affect the other other outcomes of the forest. You can also set it up with an
objective similar to that of the ecological-economic tradeoff analysis by making the
objective the minimization of (RWDVSUM - wPNV12), then performing a series of
tradeoff runs by varying w.
In DPEM_Bar.zip
Several Excel Spreadsheets related to the Policy models listed above, set up as linear
models in the spreasheet, and capable of being solved with Solver.