| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
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| Research Abstract |
The purpose of this research project is to provide some basic information on well-organized timber harvesting technology for mountainous forests in Japan, which would develop through the optimization of operational system designed by the combination of forest road network and highly mechanized forestry machines, such as a mobile tower yarber, a harvester, a processor and a forwarder. An annual research was performed according to the research plan of application forms and the following results were obtained.
1.In case of steep slope terrain conditions that exceed about 25 degree, the following harvesting system is superior in productivity, cost and environmentally safety operational practice to the existing harvesting operations ; felling with chainsaws, extraction with a mobile tower yarder, bucking with a processor, logs-preparation and loading at landing places with a log-loader mounted a grapple crane, and transportation with logging trucks.
2.In case of moderate slope terrain conditi
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ons under 25 degree, the following two types of harvesting systems are especially superior in productivity, cost and environmentally safety operational practice to the existing harvesting operations ; (1) felling with a feller buncher, extraction with skidders, bucking with a processor, logs-preparation and loading at landing places with a log-loader mounted a grapple crane, and transportation with logging trucks. (2) felling and bucking with a harvester, logging with a forwarder, and transportation with logging trucks. As a general rule, the former is suitable for a large-scaled harvesting practice and the latter for a small-scaled harvesting practice.
3.Modeling of the optimum operational system for a mobile tower yarder which is considered to be low-impact harvesting machines under steep slope terrain conditions, such mountainous forests as Japan, was studied in combination with forest road layout and its density require. The structural standards of forest roadsd corresponding to highly mechanized forestry machines were also discussed and some suggestions for standard improvement were finally proposed. Less
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