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ICON Woodmiles indexes
ICON Woodmilege (m3*)
ICON Woodmileage L (m3*)
ICON Woodmileage CO2 (kg-CO2)
ICON Knowledge level of logistics stops (%)
ICON Calculation of Woodmiles
ICON The volume of timber used
ICON Collecting information of transportation
ICON Calculation of Woodmiles indexes
ICON Evaluation of the demonstration
ICON Level of local timber utilization
ICON Traceability of timber
ICON Transportation energy of timber
ICON Manual for Calculation of Woodmiles indexes

Calculation of Woodmiles< Evaluation of the demonstration >

The result of the above calculation is:

Woodmiles: 50 q
Woodmileage: 1,000 m3Eq
WoodmileageCO2: 132 s
Knowledge level of logistics stops: 60 %

Woodmiles Forum further evaluates this kind of calculation in the Woodmiles report focusing on the points below:

1, the degree of local timber utilization (Woodmiles)
2, the level traceability of timber (Knowledge level of logistics stops)
3, the ratio of energy reduction in timber transportation

When evaluating, what is important is comparisons. For that purpose, Woodmiles Forum has calculation data of average values of gWoodmilesh, gWoodmiles CO2h of timber circulating in the country including imported timber.

In the calculation of the average values, we use data from different sources. As for the supply of timber, we refer to gSupply of wood product (roundwood)h in gthe annual report of forest and forestryh. As for the transportation distance imported timber, we refer to gProvisional distances of imported timber to port of entryh, by Woodmile Forum. As for the transportation distance of domestic timber, we refer to gSupply/Demand of timberh, by the Ministry of agriculture, forestry, and fisheries, which was also referred in gPolicy to promote local timber utilization and energy in the timber transportation---an evaluation of the policies using Woodmiles indexesh by Society for Environmental Economics and Policy Studies. As for plywood products, we use statistical data of JPMA to come up with the average values. But when in doubt, we use the data of sawn timber products instead.

1, Level of local timber utilization

By comparing the Woodmiles of the applicable house with the average Woodmiles value of it, we evaluate the level of local timber utilization as follows:

@ Woodmiles
(one) 0`700 q 1/10 of average value
ihalfj 701`6,999 q between 1/10 of average value and average
(nil) 7,000 q` more than average


2, Traceability of timber

By the knowledge level of logistics stops, we grade as follows:

@ Knowledge level of logistics stops
(one) 75`100 %  
ihalfj 50`74 %  
(nil) 0`49 % (more than half of the logistics history is Unknown)


3, Transportation energy of timber

By multiplying the average value of Woodmiles CO2 of domestic timber, calculated by Woodmiles Forum, by the total volume of timber of the applicable house, we come up with the provisional Woodmileage CO2 of a house constructed with generally distributed timber (including imported timber). We compare this as average value with that of the applicable house, and evaluate the latter by the difference of the amount of energy reduction

@ the ratio of Woodmileage CO2 reduction
(one) 50 %` (more than half of average value)
ihalfj 1`49 % (more than average and less than half of average valuej
(nil) 0 % (more than average)

Taking the above 3 viewpoints into account, the result of our evaluation is as follows:

the ratio of Woodmileage CO2 reduction@
(one) Woodmiles : 50km
the level traceability of timber:
ihalfj Knowledge level of logistics stops: 60 %
the ratio of energy reduction in timber transportation:@ (nil) the ratio of Woodmileage CO2 reduction: 94 %

(all calculated as sawn timber materials)

The total evaluation : P P (two and a half)

Calculation of Woodmiles indexes consists of a series of simple calculations. By using the Manual for calculation, anyone with a certain level of interest and effort can perform it. Still, we advise to use spreadsheet software because when transportation routes are complicated and there are many kinds of timber involved, it takes a lot of time and effort.

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