Graduate Project
 

Short distance transportation in the mixed peat swamp forests of Sarawak, Malaysia

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https://ir.library.oregonstate.edu/concern/graduate_projects/k930c3019

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  • The peat swamp forests of Sarawak are an important resource in the context of the socio-economic development of the state. Logging is the main activity in these forests. In the absence of an economical mechanized system, the method of harvesting has evolved into a highly organized effective manual system. Though the method itself is wellknown, there is still a dearth of quantitative data especially with respect to the mixed peat swamp forests of Sarawak. A timestudy was conducted in two forest reserves near Simunjan in the First Division of Sarawak. The primary objective was to quantify the logging system with special emphasi5 on the skidding component. Other components that were studied include felling and bucking, skid track construction, debarking and loading. Both the one- and two-skid team crews were studied, with emphasis on the Abstract approved: ,---i .trv- I (iLz frLJ former. Both continuous timing and fi:ed interval activity sampling techniques were used. The skidding component was the key element controlling the overall production of the logging operation. It is comprised of five basic work elements, namely outhaul, load, sling, inhaul and unload. Load and inhaul were the largest work elements accounting for 30 percent or mcre of the basic cycle time. The basic cycle time ranged from 63-88 percent of the total cycle time depending upon the skidding potential of a crew. The skidding potential is a measure of a crew's aggressiveness. Skid distance and log weight were found to be significant variables accounting for more than 60 percent of the variation in cycle time. Crew aggressiveness and variability in skidding ctential could however counteract the effect of skid distance and log weight. The incidence of delays and their frequency may also be attributed to these factors. ience, skid distance, log weight and skidding potential of crews control the skidding productivity of the system. On the whole the logging operation in the I1ixed Peat Swamp Forest is a low-energy system of less than 13500 kilojoules per hour with an average productivity of 1.42 m3 per person day.
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