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論文投稿 天然ダム越流侵食時に形成される水みちの発達過程に関する研究

作成年度 2013 年度
論文名 天然ダム越流侵食時に形成される水みちの発達過程に関する研究
論文名(和訳)
論文副題
発表会
誌名 砂防学会誌
巻・号・回 66巻2号
発表年月日 2013/07/01
所属研究室/機関名 著者名(英名)
(独)土木研究所吉野弘祐
国土技術政策総合研究所内田太郎
(独)土木研究所石塚忠範
京都大学水山高久
抄録
Earthquakes and heavy rainfall result in the formation of landslide dams following a massive collapse or landslide. Clarifying geomorphic changes to landslide dams following overtopping is important for mitigation of future disasters. However, past modeling experiments have not provided adequate information about geomorphic changes at landslide dams in actual scale. Recently, detailed geomorphic data before and after the landslide dam overtopping erosion by LiDAR was acquired, and it came to be able to understand the detailed shape of the water channel that has been caused along with the erosion. Therefore, we used aerial photographs, and LiDAR data sets to analyze the geomorphic changes of some landslide dams formed during the 2004 Chuetsu earthquake, the 2008 Iwate and Miyagi inland earthquake and so on. In this study, we also presented new method for describing geomorphic change of water channel. We used slope stability analysis for slope collapse at side slope of water channel. Then, we verified this method with the LiDAR data sets.
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