Scenarios based on NFI12

Scenarios containing roundwood and energy wood removals:
- NT maximum economic removal
- SY maximum sustained yield
- SYH maximum sustained yield without NF12 calibrated waste wood in loggings (see Quality descriptions Assumptions)
- TH realized cutting removals

All the net present value calculations have been made using roadside prices for industrial wood (logs and pulp) and for energy wood the price of forest chips at the mill yard subtracted with corresponding logging costs to the road side or to the mill yard.

NT : Maximum economic removal

Maximum economic removal scenario defines roundwood and energy wood harvest levels that maximize the net present value without taking into account any sustainability constraints or the demand of wood products. This scenario will harvest all the cutting possibilities as soon as they are feasible for harvesting according to the silvicultural recommendations and which do not fulfill the economic prerequisite (5 % discount rate) for further growing. This scenario defines the maximum short-term economical timber supply.

SY : Maximum sustained yield

The maximum continuously maintainable removal is defined by maximizing the net present value with 4 % discount rate subject to non-declining periodic total roundwood and energy wood removals, saw log removals and net income. There are no sustainability constraints concerning tree species, cutting methods, age classes or the growth/drain -ratio in order to efficiently utilize the dynamics of forest structure. Energy wood removal can consist of stems, cutting residues, stumps and roots.

TH : Realized cutting removals

Realized cutting removal scenario outlines the development of forest resources if the current (2016-2018) roundwood and energy wood harvesting levels are carried out in the future. In this scenario, the net present value is maximized with 4 % discount rate subject to realized cutting removals by timber assortments. Roundwood removals consist of industrial roundwood, rounwood used for energy and roundwood for households harvested from the area in question. Energy wood removals consist of forest chips used inindustial heat and power plants and fuelwood for households. There are no restrictions concerning the removals e.g. by cutting methods, diameter classes or site types. The target constraints are allowed to vary ± 0,5 %. The saw timber section was allowed to bend if the realized total roundwood target with realized assortment distribution was not obtained in the future.

SYH : Maximum sustained yield without waste wood calibration

Basically same as SY but calculated without NFI12 based w aste wood calibration model. This scenario is made in order to compare the effect of the new waste wood calculation (see Quality descriptions Assumptions) and in order to get NFI12 based results comparable with earlier NFI cutting possibility estimates.