Abstract
ABSTRACT Defining the optimum points for installing of a cable logging system is a problem faced by forestry planners. This study evaluated the application of a mathematical programming model for optimal location of cable logging in wood extraction. The study was conducted in a forestry company located in Parana State, Brazil. We collected data during timber harvesting and developed mathematical models to define the optimal location of the cable logging considering the variables “cycle time” and “extraction distance”. The variable “cycle time” affected the definition of the optimal location of equipment resulted in a reduced number of installation points with the largest coverage area. The variable “distance extraction” negatively influenced the location, with an increased number of installation points with smaller coverage. The developed model was efficient, but needs to be improved in order to ensure greater accuracy in wood extraction over long distances.
Highlights
IntroductionWood logging in mountainous regions has always represented a challenge for Brazilian forestry companies, requiring efficient planning of the operations and the use of specific equipment in these conditions, as productivity under these conditions is low and operating costs are high
Wood logging in mountainous regions has always represented a challenge for Brazilian forestry companies, requiring efficient planning of the operations and the use of specific equipment in these conditions, as productivity under these conditions is low and operating costs are high.The use of cable logging system is a technically feasible alternative for wood extraction under these operating conditions, especially when road access is limited and greater care is required to protect the terrain. Lopes et al (2011) mention that the cable logging system allows the removal of wood from difficult-to-access areas with low environmental impact.due to the complexity of the operation, planning wood harvest with cable logging has become of fundamental for optimizing operations and to reduce production costs (Lopes et al, 2003)
This study evaluated the application of a mathematical programming model for optimal location of cable logging in wood extraction
Summary
Wood logging in mountainous regions has always represented a challenge for Brazilian forestry companies, requiring efficient planning of the operations and the use of specific equipment in these conditions, as productivity under these conditions is low and operating costs are high. Due to the complexity of the operation, planning wood harvest with cable logging has become of fundamental for optimizing operations and to reduce production costs (Lopes et al, 2003). This is a complex and challenging task for forest managers, and the system physical viability, economic efficiency and environmental issues should be considered (Stampfer et al, 2006). This is a complex and challenging task for forest managers, and the system physical viability, economic efficiency and environmental issues should be considered (Stampfer et al, 2006). Ghaffariyan et al (2009) state that some important aspects need to be considered in planning operations with cable logging system, such as topographic conditions, volume of wood to be extracted, distance and width of the extraction range, cutting method, capacity and installation location of the equipment, among others. Chung et al (2004) mentions that the planning should identify the location of the wood deposit and the access road conditions
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