@article{oai:konan-u.repo.nii.ac.jp:00004079,
 author = {林, 慶一 and HAYASHI, Keiichi},
 issue = {1},
 journal = {甲南大学紀要. 理工学編, Memoirs of Konan University. Science and Engineering Series},
 month = {Oct},
 note = {application/pdf, 紀伊半島の白亜系付加体である日高川層群の分布域で，平成23年の台風12号によって発生した斜面崩壊と土石流の特性を分析した．日高川層群は，沈み込む海洋プレートによって付加体深部に押し込まれたため，破壊により細片化した岩石からなるので，風化によって最終的には細粒物質を中心とする厚い風化層ができる．しかし，地下深くの高圧で強く再固結した岩石でもあるので，風化・侵食に強く高い山を形成しており，山腹斜面の河床からの比高は四万十帯の中で最も大きい．山腹斜面に生成された細粒の風化物質は，山腹斜面の全面で一斉に崩壊を起こす場合と，分割して崩壊する場合とがある．前者の場合は，先行河川である緩傾斜の本流の河床に崩落することが多く，その場所に厚く堆積して天然ダムを形成することも多い．後者の場合は，山地の隆起ととともに形成された急傾斜の渓流に崩落することが多く，土石流に転化して渓流沿いに長距離流下する．他の地質帯と異なり，このような２つのタイプの斜面崩壊/土石流が発生する日高川層群地帯では，これらを認識できるような防災教育が必要で，そのための地域住民向けの教育素材も考案した．, I analyzed the characteristics of slope failures and debris flows caused by typhoon No. 12 in 2011 in the distribution zone of the Hidakagawa Group, which is a Cretaceous accretionary prism on the Kii Peninsula. Since the Hidaka River Group is pushed into the deep accretionary prism by the subducting oceanic plate, it is composed of rocks that have been fragmented by fracture, weathering eventually results in a thick weathered layer centered on finegrained material. However, since it is also a rock that has been strongly reconsolidated at high pressure deep underground, it forms a high mountain that is resistant to weathering and erosion, and the relative height from the riverbed on the hillside slope is the highest in the Shimanto geologic belt. The fine-grained weathered material generated on the hillside slope may collapse all at once on the entire surface of the hillside slope, or it may collapse separately. In the former case, it often collapses on the riverbed of the gently sloping mainstream, which is the preceding river, and often accumulates thickly at that location to form a landslide dam. In the former case, it often collapses on the riverbed of the gently sloping mainstream, which is the preceding river, and often accumulates thickly at that location to form a landslide dam. In the latter case, it often collapses into a steep mountain stream formed with the uplift of the mountains, and it is converted into a debris flow and flows down a long distance along the mountain stream. Unlike other geological zones, in the Hidaka River Group where these two types of slope failures / debris flows occur, disaster prevention education that can recognize these is necessary, and educational materials for residents have been devised for that purpose.},
 pages = {1--17},
 title = {紀伊半島の白亜系日高川層群地帯おける斜面崩壊と土石流の特徴},
 volume = {68},
 year = {2021},
 yomi = {ハヤシ, ケイイチ}
}