|Characterisation Method Name:|
|Forest land for roads and other hard-made surface use impact on wood|
|Principal Method Name:|
|EPS: mechanistic method|
The characterisation factor is determined by a mechanistic method.
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.
|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|
|The system is global, but limited to arable land. The time frame is 1990.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|Hardmaking of forest land EPS/2000||1||kg/m2 year|