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Analyzing the Comparative Economic Efficiency of Short-wood Woodgrab Logging and Whole-tree Cable Logging Operations

Woodgrab을 이용한 단목집재와 가선집재방식에 의한 전목집재의 경제적 효율성 비교분석

  • Seol, Ara (Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Han, Hee (Department of Forest Sciences, Seoul National University) ;
  • Jung, Yoonkoo (Department of Forest Sciences, Seoul National University) ;
  • Chung, Hyejean (Department of Forest Sciences, Seoul National University) ;
  • Chung, Joosang (Research Institute for Agriculture and Life Sciences, Seoul National University)
  • 설아라 (서울대학교 농업생명과학연구원) ;
  • 한희 (서울대학교 산림과학부) ;
  • 정윤구 (서울대학교 산림과학부) ;
  • 정혜진 (서울대학교 산림과학부) ;
  • 정주상 (서울대학교 농업생명과학연구원)
  • Received : 2015.11.13
  • Accepted : 2016.05.28
  • Published : 2016.06.30

Abstract

This research was conducted in order to examine whether the Woodgrab short-wood logging method, most widely used logging method in Korea, is more favorable than other logging methods in terms of productivity and profitability. For the comparative purposes, whole-tree logging methods with cable yarding system using a swing yarder and a tower yarder were evaluated. The productivity and the profitability of the logging operations by the machine types on a L. kaempferi stand were estimated by simulating logging processes based on bucking patterns and the results were compared. As a result, the Woodgrab short-wood logging system showed the most favorable results in terms of skidding productivity and operating cost. On the contrary, the system was the least profitable among the three logging methods. Main reason is that while the system may be beneficial in terms of operation productivity, it is restricted to produce only short logs mainly for low quality raw materials such as pulp, bolts, etc. which are sold at cheap prices.

본 연구는 국내 벌채현장에서 가장 많이 활용되고 있는 Woodgrab에 의한 단목집재작업이 생산성 및 수익성 측면에서 가장 유리한 방식인가에 대한 검토를 하고자 수행되었다. 이를 위해 Woodgrab 목재수확방법의 생산성 및 수익성을 비교하기 위하여 Swing yarder와 Tower yarder에 의한 전목집재작업을 선정하였다. 이를 토대로 낙엽송 임분에 대한 작업기종별 조재지침을 적용하여 각 기종별 수확작업과정에 따른 작업비용과 등급별 원목매각 순수익을 산출하여 비교하였다. 연구결과, Woodgrab을 이용한 단목집재작업은 Swing yarder 혹은 Tower yarder에 의한 전목집재작업에 비해 생산성이나 생산단가 측면에서 유리한 반면 원목생산의 수익성 측면에서는 오히려 불리한 것으로 나타났다. 이것은 Woodgrab에 의한 목재생산작업을 하는 경우 생산비가 절감되는 대신 시장가격이 낮은 펄프, 보드류 혹은 톱밥 등의 원료재로 사용되는 단목을 주로 생산할 수 밖에 없는 것에 기인한 것이다.

Keywords

References

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  3. A Case Study on Efficiency Analysis of Cable Logging Operation in Korea vol.53, pp.6, 2019, https://doi.org/10.14397/jals.2019.53.6.35
  4. 소나무 임분에서의 트랙터윈치를 이용한 집재작업 생산성 및 비용분석 vol.108, pp.4, 2016, https://doi.org/10.14578/jkfs.2019.108.4.574