FERIC a produit un guide dans le but d’informer les industriels et entrepreneurs des différents facteurs à considérer afin de profiter des avantages que peut offrir la méthode semi-mécanisée par bandes. Il synthétise les connaissances acquises par FERIC et l’expertise développée par les entrepreneurs qui utilisent cette pratique.
The Forest Engineering Research Institute of Canada (FERIC) estimated the costs of harvesting, comminuting, and transporting pine trees killed by the mountain pine beetle in the central Interior of British Columbia. Costs were based on computer models that used three different harvesting systems depending on the ratio of sawlogs to fuelwood in the stand. For stands with less than 50% fuelwood, the existing roadside harvesting system was used to harvest sawlogs and generate roadside residuals, followed by a separate operation to comminute and transport the feedstock. This system had the lowest cost. Stands with 50-95% fuelwood were costed using a satellite sortyard. This system was best suited to sort the sawlogs from stands containing predominantly fuelwood, but it also had the highest cost.
The Forest Engineering Research Institute of Canada (FERIC), in cooperation with Winton Global Lumber Ltd. in Prince George, B.C., studied supported and unsupported winter skidding operations with conventional rubber-tired grapple skidders. In supported operations, skidders worked with track skidders and loaders that assisted with loading and decking, respectively. In unsupported operations, skidders worked alone. This report presents the study results, and discusses factors that influenced the productivities and costs of both skidding systems.
Coupe avec protection de la régénération et des sols (CPRS)
Récupération de fibre
La récolte des bois secs et sains dans un peuplement suranné a réduit la productivité des machines et a conduit à une augmentation des coûts de récolte de près de 12% avec un procédé par bois tronçonnés et de 9% avec un procédé par arbres entiers. En effet, il faut être conscient que la manipulation des volumes secs entraîne des pertes de temps liées au fait que ce matériel est plus sujet aux bris et donc aux pertes de volume. Par ailleurs, dans le peuplement suranné, le taux de récupération des bois morts a dépassé 55%, bien que le bois sec et sain ne représentait que 18% du volume, laissant supposer l'introduction potentielle dans le système de bois pourri non désiré.
Harvesting of the sound deadwood in an overmature stand reduced machine productivity and increased harvesting costs by nearly 12% in a cut-to-length system and by nearly 9% with a full-tree system. The need for operators to handle dry wood, which is more subject to breakage and thus to volume losses, increased handling times. Moreover, although only 15% of the deadwood present in the overmature stand before harvesting was classed as sound, over 55% of all deadwood was recovered. As a result, harvesting deadwood may potentially introduce a significant amount of undesirable decayed wood into the system.
Harvesting with protection of regeneration and soils (HPRS)
Ecosystem-based management is centred on an ecological approach that considers a wide range of resources and values to assure productive, healthy ecosystems. The Forest Engineering Research Institute of Canada (FERIC) is conducting a series of case studies in coastal British Columbia of applications of new forestry principles that incorporate ecosystem-based management in a variety of site and stand conditions, retention levels, and harvesting systems. This report is the third in the series, and discusses the clearcut and dispersed retention compartments of a cutblock in a second-growth stand on northern Vancouver Island.
Stream networks shown on public maps are often incomplete and their accuracy fails to meet the full needs of forest managers. Stream Network Extraction (SNE) from a LiDAR Digital Elevation Model (DEM) has the potential to add to the already mapped streams and provide more hydrographical information. This report describes the potential of two different SNE programs with a LiDAR-derived DEM.
FERIC regularly surveys the forest industry to determine what machines are being used in the forest and maintains a database thereof. This report summarizes the most recent update of the database and discusses the most important current industry trends.
To reduce the potential occurrence and effects of a wildfire in a stand adjacent to a residential subdivision in the interior of British Columbia, the University of British Columbia’s Alex Fraser Research Forest aimed to reduce forest fuels within the stand by thinning from below, skidding as much debris to the landing as possible, and then piling the remaining debris for burning. Feric, a division of FPInnovations, monitored the falling and skidding phases and a test piling operation in the winter of 2005, and determined the costs and productivities of these activities.