Wood procurement in the pressure of change

Rummukainen, Arto; Alanne, Heikki; Mikkonen, Esko

doi:10.14214/aff.7510

Cited by 5 publications

(3 citation statements)

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“…The net income from a timber sale was calculated by subtracting the harvesting costs from the roadside value of the harvested trees. Harvesting costs were calculated with the models of Rummukainen et al [45].…”

Section: Use Of the Monsu Planning Systemmentioning

confidence: 99%

Synergies and Trade-Offs in the Production of NWFPs Predicted in Boreal Forests

Kurttila

Pukkala

Miina

2018

Forests

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The global growth of the consumption of non-wood forest products (NWFPs) is evident due to the current trends in lifestyle and consumption. Alongside the increased popularity and commercial use of NWFPs, their yields are also more often taken into account in forest management planning. Empirical yield models recently developed for different NWFPs enable forest managers to include their predicted yields in multi-objective optimization. However, knowledge on the synergies and trade-offs between timber production and different NWFPs is scanty. In this study, we analyzed these relationships through correlation matrices and production possibility frontiers in two case study forest holdings from Finland. A large number of Pareto optimal forest holding level plans were produced by multi-objective optimization and used to analyze trade-offs and synergies. Empirical yield models for 12 NWFPs, representing different berries, mushrooms, and tree-based products, were utilized in the analyses. The results revealed synergies and possibilities for joint-production for NWFPs, but also trade-offs between NWFPs and timber production. NWFPs often had a negative correlation with cutting removals, with the only exception being cowberry. Despite the overall negative correlation, the maximum yields of NWFPs called for some cuttings. Negative correlations with the net present value of timber production were weaker. The results are valuable when the aim is to diversify the use of boreal forests and open avenues for truly multi-objective decision support services to facilitate the decision making of forest owners.

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Section: Use Of the Monsu Planning Systemmentioning

confidence: 99%

Synergies and Trade-Offs in the Production of NWFPs Predicted in Boreal Forests

Kurttila

Pukkala

Miina

2018

Forests

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“…When net present value was maximized, the net income of a cutting event was calculated as the difference between the roadside value of the harvested trees and harvesting costs. Harvesting costs were calculated by using time consumption functions for the harvester and forwarder (Rummukainen et al 1995).…”

Section: Methodsmentioning

confidence: 99%

“…The functions of Rummukainen et al (1995) we used to calculate the harvester time of each harvested tree as a function of tree size (stem volume) and cutting type (clear felling or partial cutting). The time consumption of the forwarder depends on the total removal (m 3 /ha, converted into cubic meters per 100 meters of strip road, assuming a 20-m distance between strip roads), cutting type (partial cutting or clearfelling), terrain class (assumed normal) and forwarding distance (200 m assumed).…”

Section: Methodsmentioning

confidence: 99%

A hybrid method for tree-level optimization in continuous cover forest management

Pukkala,

Nuutinen,

Muhonen

2023

Preprint

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A current trend in forestry is the increased use of continuous cover management (CCF). Another trend is the increased availability of tree-level forest inventory data. Accordingly, recent literature suggests methodologies for optimizing the harvest decisions at the tree level. Using tree-level optimization for all trees of the stand is computationally demanding. This study proposed a flexible two-level optimization method for CCF where the harvest prescriptions are optimized at the tree level only for a part of the trees, or only for the first cuttings. The higher-level algorithm optimizes the cutting years and the harvest rates of those diameter classes for which tree-level optimization is not used. The lower-level algorithm allocates the individually optimized trees to different cutting events. The most detailed problem formulations, employing much tree-level optimization, always resulted in the highest net present value and longest time consumption of the optimization run. However, reducing the use of tree-level optimization to the largest trees and first cuttings did not alter the time, intensity, or type of the first cutting significantly, which means that simplified problem formulations may be used when decision support is needed only for the next cutting. The method suggested here can accommodate diversity-related management objectives and makes it possible to analyze the trade-offs between economic profit and diversity objectives. The case study analyses suggested that significant improvements in diversity can be obtained with moderate reductions in economic profitability.

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