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Time Prediction Models and Cost Evaluation of Cut-To-Length (CTL) Harvesting Method in a Mountainous forest
Citation
Ghaffariyan, Mohammad Reza and Naghdi, R and Ghajar, I and Nikooy, M, Time Prediction Models and Cost Evaluation of Cut-To-Length (CTL) Harvesting Method in a Mountainous forest, Small-scale Forestry, 12, (2) pp. 181-192. ISSN 1873-7617 (2013) [Refereed Article]
Copyright Statement
Copyright 2012 Steve Harrison, John Herbohn
DOI: doi:10.1007/s11842-012-9204-4
Abstract
Time equations are derived for felling with chainsaw, skidding with cable wheeled skidder, loading with grapple hydraulic loader and trucking of logs within a cut-to-length harvesting method. The continuous time study method was applied to collect data for felling, skidding, loading and a transportation model. Multiple regression analysis via SPSS software was applied to develop the time models. Felling time was found to be highly dependent on diameter at breast height. Skidding distance, winching distance, slope of the trail and piece volume were significant variables for the skidding time prediction model. The loading time model was developed considering piece volume. Transportation distance and load volume were used as independent variables in modeling the transportation time. The net production of felling was estimated at 12 trees/h (56.65 m3/h). The net production rates for skidding, loading and traveling averaged 18.51, 41.90 and 3.32 m3/h respectively. The total cost of harvesting from stand to mill was estimated 19.70 €m3. The skidding phase was the most expensive component of the cut-to-length method. The bucking and delimbing components were less costly than the other logging phases. The results of this study can be used for harvesting planning and productivity optimization.
Item Details
Item Type: | Refereed Article |
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Keywords: | Iran, time study, productivity, felling, bucking, sidding, loading, transport, unloading |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Forestry sciences |
Research Field: | Forestry sciences not elsewhere classified |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Forestry |
Objective Field: | Harvesting and transport of forest products |
UTAS Author: | Ghaffariyan, Mohammad Reza (Dr Mohammad Ghaffariyan) |
ID Code: | 85201 |
Year Published: | 2013 |
Web of Science® Times Cited: | 23 |
Deposited By: | Architecture |
Deposited On: | 2013-06-18 |
Last Modified: | 2014-05-07 |
Downloads: | 0 |
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