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http://dx.doi.org/10.14578/jkfs.2014.103.1.87

Comparison of Harvesting Productivity and Cost of Cable Yarding Systems  

Han, Won Sung (Forestry Economics and Management Research Institute, National Forestry Cooperative Federation)
Han, Han-Sup (Department of Forestry and Wildland Resources, Humboldt State University)
Kim, Nam-Hun (College of Forest & Environmental Sciences, Kangwon National University)
Cha, Du Song (College of Forest & Environmental Sciences, Kangwon National University)
Cho, Koo Hyun (Forest Practice Research Center, Korea Forest Research Institute)
Min, Do Hong (Forestry Economics and Management Research Institute, National Forestry Cooperative Federation)
Kwon, Ki Cheol (Forestry Economics and Management Research Institute, National Forestry Cooperative Federation)
Publication Information
Journal of Korean Society of Forest Science / v.103, no.1, 2014 , pp. 87-97 More about this Journal
Abstract
This study was conducted to provide field-based harvesting study information which can be used to select an optimal cable system for certain work conditions on steep grounds (> $20^{\circ}$ ground slope) in Korea. To accomplish this study objectives, we evaluated three cable yarding systems (RME-300T tower-yarder, Chuncheon tower-yarder, FARMI tractor winch) working in typical work conditions for their yarding productivity and operational efficiency. Those yarders are commonly used for removing logs or trees on steep grounds in Korea. Under the same work conditions (average DBH of tree to be cut, 20 cm; yarding distance, 60 m; lateral yarding distance, 10 m; and machine utilization rate, 70%), the average productivities were $33.04m^3$/day, $38.47m^3$/day, and $14.17m^3$/day for RME-300T, Chuncheon tower-yarder, and FARMI, respectively. Our standardized cost comparison study also showed that the yarding cost was highest at $37,835won/m^3$ with FARMI, followed by RME-300T at $25,105won/m^3$ for the same work conditions. We found the lowest yarding cost with the Chuncheon tower-yarder at $20,520won/m^3$ which was resulted primarily from high yarding productivity at the yarding distance (60 m). Our analysis suggested that a small machine such as FARMI could be a low-cost yarding machine option for a cable yarding job with a short yarding distance (40 m or less). The Chuncheon tower-yarder is well suited for a mid-range yarding distance job in Korea, ranged between 40 to 140 m. If yarding distance were longer than 140 m, the RME-300T tower yarder appears to be most cost-effective.
Keywords
cable yarding; yarding productivity; yarding cost;
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Times Cited By KSCI : 5  (Citation Analysis)
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