日光, 華厳滝の後退速度 Recession Rates of Kegon Falls in Nikko, Tochigi Prefecture, Japan

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The mean recession rate of Kegon Falls is examined, estimating original location and age. Two locations (L<SUB>I</SUB> and L<SUB>II</SUB>) at which the waterfall originated are estimated based on the distribution of Kegon lava, while the age of origination is considered to be the same as that of the Kegon lava eruption, <I>i.e.</I>, 20, 000 years ago. Two values of the mean recession rate obtained are 0.018 m/y for the case of L<SUB>I</SUB> and 0.10 m/y for the case of L<SUB>II</SUB>. On the other hand, the recession rate can be evaluated, as an order estimation, using the empirical equation of the authors (Hayakawa and Matsukura, <I>Earth Surf. Process. Landforms</I>, 28, 2003), which shows relationships between the recession rates of waterfalls and the ratio of the erosive forces of rivers to bedrock resistance. The values of parameters used in the index of force/resistance ratio are obtained from existing data and field measurements for Kegon Falls. Substituting them into the equation, the recession rate is calculated to be in the order of 0.009-0.019 m/y. This result suggests that the recession rate for the case of L<SUB>I</SUB> is suitable for Kegon Falls.

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  • 地學雜誌

    地學雜誌 112(4), 521-530, 2003-08-25

    公益社団法人 東京地学協会

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被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10013949621
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    6689859
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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