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Characterisation Method Information
Characterisation Method Name:
Forest land for roads and other hard-made surface use impact on wood
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: mechanistic method
Method Description:
Model
The characterisation factor is determined by a mechanistic method.

Mechanism

A typical growth rate in a boreal forest is 4-10 m 3 per year and hectare. A tropical forest can produce as much as 50m 3 /hectare and year, at least temporarily. Based on this a best estimate of 0.5 kg dry substance per m 2 is made. Hard-making will decrease the production capacity by 0.5 kg dry substance per m 2 and year as long as the hard making remains. If we consider a road, it may be used for at least one hundred years and, if not demolished and removed, the impact will remain for another 100 years. A conservative guess is therefore that the category indicator will be changed by 1 kg dry substance per m 2 and year the hard-made surface is used.

Calculation of characterisation factor

The characterisation factor of use of forest land for roads and other hard-made surfaces is thus 1 kg wood(DS)/m 2 year.

Literature Reference:
Steen B (1999b): A systematic approach to environmental priority strategies in product development (EPS). Version 2000 Models and data of the default method CPM report Chalmers University of Technology Sweden
Methodological Range:
The system is global, but limited to arable land. The time frame is 1990.
Notes:

Existing Characterisation Factors of Forest land for roads and other hard-made surface use impact on wood
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor Wood EPS/2000
Type = Natural resource
Direction = Input
Media = *
Geography = *
Hardmaking of forest land EPS/2000 1 kg/m2 year