Journal of the Japan Forest Engineering Society
Online ISSN : 2189-6658
Print ISSN : 1342-3134
ISSN-L : 1342-3134
Search
Advanced search
OR
Browse
Search
Volume 31, Issue 1
Displaying 1-9 of 9 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Foreword of special issue
Review
Research and technical report
Miscellaneous note
Note
Article
  • The present conditions and factor analysis of the forest road institution disaster in Amami Oshima
    Yoshihito IUCHI, Masaru OKA, Yukiyoshi TERAMOTO
    Article type: Article
    2016Volume 31Issue 1 Pages 45-54
    Published: January 31, 2016
    Released on J-STAGE: April 03, 2017
    DOIhttps://doi.org/10.18945/jjfes.KJ00010223635
    JOURNAL OPEN ACCESS
    Show abstractHide abstract
    Forest roads have been constructed on Amami Islands since 1960 by the Kagoshima prefectural government and they have been damaged because of heavy rains. The latest damage of the forest roads was caused by the record rainfall received in October 2010. We collected data on the serious damages of forest roads because of heavy rains on and after 1975 including the damages in October 2010 and analyzed their data. The results are as follows: 1) More than 80 % of the serious damages of forest roads are due to the collapse of cut slope. 2) The frequency of forest road damages in each route decreased the year when a route of forest road was established and is at a low level after around 1995. This may be because of the change in planning and designing in 1995. 3) Analyzation by a mathematical quantification theory class 1 showed that an amount of collapsed mass relates geological and geomorphological conditions of the road route such as catchment area, slope shape, and longitudinal gradient.
    View full abstract
    Download PDF (5612K)
Research and technical report
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top