Canadian Forest Service - Ash Protection Model (CFS-APM)

Model Inputs

Input information about your existing ash tree, your potential replacement tree, and other economic factors that impact the analysis of whether to treat or remove your tree. Default values are provided, but can be changed by users to reflect their circumstances or expectations.

Information on Existing Ash Tree

Diameter at breast height (DBH): cm
Location of tree relative to house: North South East West
Distance of Tree From House: m

Information on the Replacement Tree

Will a new tree be planted? Yes No
Location of tree relative to house: North South East West
Distance of tree from house: m
Type of tree for new planting: Coniferous Deciduous

Economic Inputs

Discount rate: %
Removal cost: $
Replacement cost: $
Cost per treatment: $
Treatment frequency: Years
Removal lag: Years
Home resale value: $ x 1000
Contribution of Existing Tree to Home Value: %

Optional Benefits and Costs

Select one or more of the options to see how the inclusion of these extended benefits and costs affects the economic attractiveness of treating your tree.

Calculate home value benefits
Calculate energy savings
Calculate runoff & pollution benefits
Calculate tree maintenance costs

Model Outputs

For each year of the simulation the net treatment gain/loss is calculated and plotted on a graph, indicating the period of time over which a homeowner would be financially ahead/behind by using the treatment approach. Separate graphs are also shown for each of the optional benefits and costs. The treatment gain/loss in each year of the simulation is also shown in a table along with an equivalent annual amount. Negative values indicate the annual amount that a homeowner would have to be willing to pay in order to maintain the existence of a tree for the number of years shown in the table. The model runs for a 30-year time period.

e
g
b
c
f
d
a

Treatment Gain/Loss ($)Equivalent Annual Value ($)
0-171-171
1-171-87
2534185
3534141
437581
537569
622336
722332
87710
9779
10-63-7
11-63-6
12-196-19
13-196-18
14-323-28
15-323-27
16-444-35
17-444-34
18-559-41
19-559-40
20-668-46
21-668-44
22-771-50
23-771-49
24-869-53
25-869-52
26-961-57
27-961-55
28-1049-59
29-1049-58
30-1131-62

Treatment Costs and Benefits ($)
Year Cumulative Treatment Cost Home Value Benefit by Treating Tree Cumulative Energy Benefit by Treating Tree Cumulative Runoff & Pollution Benefit by Treating Tree Cumulative Maintenance Cost by Treating Tree
0-1710000
1-1710000
2-3360000
3-3360000
4-4940000
5-4940000
6-6460000
7-6460000
8-7920000
9-7920000
10-9320000
11-9320000
12-10650000
13-10650000
14-11920000
15-11920000
16-13130000
17-13130000
18-14280000
19-14280000
20-15370000
21-15370000
22-16400000
23-16400000
24-17380000
25-17380000
26-18300000
27-18300000
28-19180000
29-19180000
30-20000000

Removal Costs and Benefits ($)
Year Cumulative Removal Cost Cumulative Replacement Cost Home Value Benefit by Replacing Tree Cumulative Energy Benefit by Replacing Tree Cumulative Runoff & Pollution Benefit by Replacing Tree Cumulative Maintenance Cost by Replacing Tree Net Gain/Loss ($) Annual Equivalent Value ($)
0000000-171-171
1000000-171-87
2-499-3700000534185
3-499-3700000534141
4-499-370000037581
5-499-370000037569
6-499-370000022336
7-499-370000022332
8-499-37000007710
9-499-3700000779
10-499-3700000-63-7
11-499-3700000-63-6
12-499-3700000-196-19
13-499-3700000-196-18
14-499-3700000-323-28
15-499-3700000-323-27
16-499-3700000-444-35
17-499-3700000-444-34
18-499-3700000-559-41
19-499-3700000-559-40
20-499-3700000-668-46
21-499-3700000-668-44
22-499-3700000-771-50
23-499-3700000-771-49
24-499-3700000-869-53
25-499-3700000-869-52
26-499-3700000-961-57
27-499-3700000-961-55
28-499-3700000-1049-59
29-499-3700000-1049-58
30-499-3700000-1131-62