Search Results 1-5 of 5

  • NUMERICAL SIMULATION OF LARGE-SCALE SEDIMENT TRANSPORT DUE TO THE 2011 TOHOKU EARTHQUAKE TSUNAMI IN RIKUZENTAKATA CITY  [in Japanese]

    YAMASHITA Kei , NAKATA Kazuto , SAKA Ryotaro , NISHIKAWA Asao , SUGAWARA Daisuke , TAKAHASHI Tomoyuki , IMAMURA Fumihiko , SAITO Yuichi , IMATO Yoshiyuki , KAI Tadashi , UEHARA Hitoshi , KATO Toshihiro

    岩手県陸前高田市における,2011年東北地方太平洋沖地震津波による大規模土砂移動を対象とした再現計算を実施した.その結果,津波の遡上過程や浸水高,地形変化量や海域における堆積土砂の分布傾向を,本計算が良好に再現することを示した.そして,津波による地盤の侵食は,従来の土砂移動を考慮しない解析と比較して陸域における遡上過程を早める効果を有することがわかった.また,2011年東北地方太平洋沖地震津波の第 …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71(2), I_499-I_504, 2015

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  • Depositional process of Holocene sediment based on analyses of sediment cores obtained from Rikuzentakata plain, Northeast Japan

    NIWA Yuichi , TODA Shinji , SUGAI Toshihiko , YAMAICHI Tsuyoshi

    <b>1.  </b><b>はじめに</b> <BR><br>  三陸海岸中~南部は山地が海に迫り,海岸線が著しい屈曲をなすリアス式海岸である.岬と岬に挟まれた湾には中小の河川が流入し,小規模な沖積平野が形成されている.陸前高田平野(図1)は,三陸海岸の中でも沖積平野の面積が比較的広く,ボーリング …

    Proceedings of the General Meeting of the Association of Japanese Geographers 2014s(0), 100136, 2014

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  • Holocene sedimentary facies, sediment accumulation rate and coastal subsidence estimated from a sediment core in the Rikuzentakata Plain, northeast Japan  [in Japanese]

    Niwa Yuichi , Toda Shinji , Sugai Toshihiko , Matsushima Yoshiaki

    三陸海岸の隆起・沈降史復元に向けた手始めとして,陸前高田平野においてコア堆積物の解析を行った.堆積物は,下位から陸上河川堆積物,潮汐の影響する河川および浅海堆積物,プロデルタ〜デルタフロント堆積物,および陸上泥湿地堆積物からなる.合計25試料の<sup>14</sup>C年代測定値に基づいた堆積曲線から推定した堆積速度は,コア下部(9,500〜9,300calBP)で20m …

    The Quaternary Research (Daiyonki-Kenkyu) 53(6), 311-322, 2014

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  • Sedimentary features observed in the tsunami deposits at Rikuzentakata City

    Naruse Hajime , Arai Kazuno , Matsumoto Dan , Takahashi Hiroki , Yamashita Shota , Tanaka Gengo , Murayama Masafumi

    … The March 11, 2011 Tohoku-Oki tsunami triggered by an earthquake off the east coast of northeastern Honshu Island (Tohoku region), Japan, deposited large amounts of sediment on land, including the Sendai Plain and Sanriku Coast. … This study reports on the characteristics of the tsunami deposits in Rikuzentakata City, southeastern Iwate Prefecture, northeastern Japan. … The tsunami deposits in Rikuzentakata City generally consist of one to four units that represent a discrete runup or backwash flow. …

    Sedimentary Geology (282), 199-215, 2012-12

    IR 

  • Recent Alluvial Deposit and Holocene Sea-level Change on Rikuzentakata Coastal Plain, Northeast Japan

    CHIDA Noboru , MATSUMOTO Hideaki , OBARA Shinichi

    … The Rikuzentakata coastal plain, about 2km from north to south and about 2.5km from east to west, is larger one of these plains. … The most part of the plain is lower than 5 meters above the sea-level. … The Kesen river and the Hamada river flow on the western and eastern part of the plain, respectively (Fig. 1).<br>The sequence of Alluvium along the shoreline is shown in Fig. 4. …

    Annals of The Tohoku Geographycal Asocciation 36(4), 232-239, 1984

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