Search Results 1-20 of 2602

  • Development of disaster prevention education video and teaching materials on the theme of local natural disasters: Joint research between Higashi-Hiroshima City and Hiroshima University triggered by the heavy rains in western Japan in July 2018  [in Japanese]

    熊原 康博 , 岩佐 佳哉 , 村田 翔 , 後藤 秀昭 , 竹内 峻 , 石原 悠一郎 , 清田 美紀 , 長野 由知 , 東広島市危機管理課

    本論文の内容の一部は,2020年度地理科学学会秋季学術大会で口頭発表しました。

    学校教育実践学研究 (27), 161-168, 2021-03-19

    IR  DOI 

  • A folk legend of a disaster at the foot of Untama-mui (Conical hill) and relocation of Yonabaru Town, Okinawa, Japan  [in Japanese]

    木村 和雄 , きむら かずお , KIMURA Kazuo , 総合科学科

    沖縄島南部に位置する運玉森の周辺には「与那の島の惨事」という災害伝承がある。その南東麓にある久葉堂という拝所は、この伝承と関連する可能性が指摘されている。しかしそれを裏付ける文書等の資料を見出せず歴史学的検証は困難なことから、微地形分類および各種地図情報の判読等の地理学的手法により、伝承の実態把握を試みた。その結果、「与那の島の惨事」とは、近世後半に起きた土石流災害によって、久葉堂周辺すなわち現在 …

    沖縄工業高等専門学校紀要 = Bulletin of National Institute of Technology, Okinawa College (15), 1-8, 2021-03-16

    IR 

  • Stratigraphy and Lithologic Features of Borehole Core from Sobetsu Observation Well, Usu Volcano, Hokkaido, Japan  [in Japanese]

    長井 雅史 , 大島 弘光 , 中川 光弘 , 吉本 充宏 , 松本 亜希子 , 山本 英二 , 棚田 俊收 , 檀原 徹 , 岩野 英樹

    … The upper part (0 to 22.8 m in depth) consists mainly of dacitic debris flow (lahar) deposits. … The upper part can be ascribed to the secondary debris flow (lahar) deposit of historic Usu eruption deposits distributed on the volcanic fan of Usu volcano. …

    防災科学技術研究所研究資料 = Technical Note of the National Research Institute for Earth Science and Disaster Resilience (456), 1-36, 2021-02-16

    IR  DOI 

  • Estimation of runoff sediment volume and peak discharge of debris flow based on a stochastic method and effects of drainage basin area, precipitation and geology on them  [in Japanese]

    石川 芳治

    新砂防 = Journal of the Japan Society of Erosion Control Engineering : 砂防学会誌 73(5), 15-26, 2021-01

  • About "Hyogo-style Chizan Dam" that is effective against driftwood & debris flow  [in Japanese]

    太田 雄一郎 , 村上 晴茂 , 杉山 和史 , 長井 斎 , 松原 智生

    新砂防 = Journal of the Japan Society of Erosion Control Engineering : 砂防学会誌 73(5), 49-52, 2021-01

  • APPLICATION OF AIRBORNE ELECTROMAGNETIC PROSPECTING TO PREVENTIVE MAINTENANCE MANAGEMENT ON EXPRESSWAY SLOPES  [in Japanese]

    MAKIURA Nobukazu , KAMIDE Sadayuki , SAKURADANI Keiji , OKUMURA Minoru , ODA Kazuhiro , MATSUI Tamotsu

    <p> 高速道路斜面の予防保全管理のためには,広範囲に分布する崩壊危険斜面や地すべり・土石流危険渓流などを精度良く,効率的かつ経済的に抽出する技術が不可欠であるので、筆者らは広域地盤の3次元比抵抗分布を短時間に求めうる空中電磁探査を導入した.本論文では,空中電磁探査による比抵抗絶対値と強調値表示法および新たに開発した対数比抵抗強調値表示法について述べるとともに,広域地盤性状の概略的把握 …

    Journal of Japan Society of Civil Engineers, Ser. F4 (Construction and Management) 77(1), 83-95, 2021

    J-STAGE 

  • STUDY ON AN EVALUATION METHOD OF INITIATION PROBABILITY OF DEBRIS FLOWS DURING HEAVY RAINFALL

    KOBASHI Rikiya , KITA Masato , UCHIDA Tatsuhiko , KAWAHARA Yoshihisa

    … <p> In an extreme climate event named "the Heavy Rain Event of July 2018, " prolonged and widespread heavy rainfall in western Japan caused several debris flows, which led the sediment to flow into rivers, causing further damage from sediment-flood inundation. … The estimation of the probability of debris flow initiation and quantitative risk assessment have been challenging issues. …

    Journal of JSCE 9(1), 94-102, 2021

    J-STAGE 

  • STUDY ON SEDIMENT DISASTERS IN TENNOU, KURE CITY, HIROSHIMA PREFECTURE AND SEDIMENT AND FLOOD DAMAGE IN DOWNSTREAM AREA

    HASEGAWA Yuji , NAKATANI Kana , ARAKI Yoshinori , KAIBORI Masahiro , SATOFUKA Yoshifumi

    … Not only were there direct damage caused by debris flows, such as destructed buildings, but some places several kilometers downstream from the landslides and debris flows also experienced flooding that lasted several hours and sediment deposition from the rivers. … In Tennou, debris flows occurred and large boulders moved upstream. …

    Journal of JSCE 9(1), 103-112, 2021

    J-STAGE 

  • Study of floatable collection mechanism of vortex generated by water surface control device  [in Japanese]

    IWASA Yukitoshi , UCHIDA Tomofumi , SATO Makoto , TSUKADA Shigeru , MORITA Hiroaki

    <p> 合流式下水道の雨水吐き室から公共用水域に流出する浮遊性夾雑物(浮遊物という)の削減を目的に,雨水吐き室の中に渦を生成させ,浮遊物を処理場に流送する水面制御装置が開発されている.本装置は,雨水吐き室に制御板を設置することで渦流を生成させ,その渦流により浮遊物を流集し,遮集管へと引き込む機能を有している.しかし,制御板で生成された渦がどのように浮遊物を集めて,遮集管へと引き込み,流 …

    Journal of Japan Sewage Works Association 58(701), 114-124, 2021

    J-STAGE 

  • An estimation method of pore water pressure using soil water index in heavy rain and its application to early warning of sediment-related disasters in hilly and mountainous areas  [in Japanese]

    YABE Mitsuru , UENO Shoji , TANIGAWA Masashi , KATSUME Yasunori

    <p> 近年豪雨に伴う土砂災害が頻発しており, それら災害では中山間地域での高齢者などの社会的弱者が犠牲になるケースが見られる。この場合, 社会的弱者が余裕を持った避難が行えるような警戒発令を行うことが重要だが, そのための基準値策定の具体的な方策はまだ見つかっていない。本研究では, 土壌雨量指数を用いた表層崩壊の誘因となる地盤の間隙水圧の推定法について, 中山間地域の長野県辰野町の斜 …

    Journal of the Japan Landslide Society 58(1), 28-39, 2021

    J-STAGE 

  • Experimental Study of Sabo Dam Physical Measures Against Subsequent Sediment Flow Following Debris Flow Deposition

    KIM Yongrae , YAMADA Takashi

    … <p>Typical countermeasures against subsequent sediment flow following debris deposition include channel works and sand pockets ; … The objective of this study was to propose a novel method for capturing subsequent sediment flow following debris deposition at a sabo dam. …

    International Journal of Erosion Control Engineering 13(3), 56-63, 2021

    J-STAGE 

  • Geotourism and Disaster Storytelling: Lessons from 2013 Izu-Oshima Island Debris Flow Disaster

    Nishitani Kana , Nakagawa Kazuyuki , Nagamatsu Shingo

    … <p>This report supports geotourism as an effective method of disaster storytelling, based on the lessons learned during and after the 2013 Izu-Oshima Island Debris Flow Disaster. …

    Journal of Disaster Research 16(2), 170-175, 2021

    J-STAGE 

  • The effect of temporary sealing materials and cleaning protocols on the bond strength of resin cement applied to dentin using the resin-coating technique

    SATO Takaaki , NIKAIDO Toru , TAGAMI Junji , TAKAHASHI Rena , ROZAN Shin , UCHIYAMA Saki , BABA Yuta , VICHEVA Martina , SATO Ayaka , IKEDA Masaomi , TAKAGAKI Tomohiro

    … After 1-week water storage, one of the following three cleaning protocols was performed: -WA: washed with water, -BR: brushed with PRESSAGE, and -AF: cleaned with AIR-FLOW. … Irrespective of the cleaning protocol used, Washable SEP demonstrated less residual debris on resin-coated dentin, resulting in high bond strength. … Regardless of the temporary sealing material applied, AIR-FLOW demonstrated less residual debris, resulting in high bond strength.</p> …

    Dental Materials Journal, 2021

    J-STAGE 

  • Influence of Overland Flow on Occurrence of Slope Failures and Debris Flows in Gentle Slopes  [in Japanese]

    秦 雅之 , 海堀 正博

    … Our field survey showed a possibility that overland flow due to these unprecedented heavy rainfalls caused these slope failures. … However, previous numerical models can be applied to a situation where only subsurface flow is generated, but they cannot analyze shallow failures in gentle slope areas. …

    広島大学大学院人間社会科学研究科紀要. 総合科学研究 (1), 47-58, 2020-12-31

    IR  DOI 

  • Debris Flow Disaster Occurred in Japan, in 2019  [in Japanese]

    竹林 洋史 , 藤田 正治

    … Field observation and numerical analysis were performed for the debris flows which were occurred in Koyasu, Marumori, Miyagi in Oct, 2019 and in Kinryu, Saga in Aug, 2019. … Three debris flows were happened in Koyasu area and those debris flows destroyed a house completely. … The results of the numerical analysis show that the debris flow approached at the residential area in 40 sec. …

    京都大学防災研究所年報. A = Disaster Prevention Research Institute Annuals. A 63(A), 91-100, 2020-12

    IR 

  • Experimental Examination of Two-layer Model for Debris Flows  [in Japanese]

    山上 路生 , 長坂 香織 , 岡本 隆明

    … There remain much uncertainties in fundamental hydrodynamics of debris flows, because it is very hard to measure velocity profiles and related turbulence structure. … Debris flows could be classified corresponding to the bottom slope. … In the mild slop situation, it is similar to open-channel flow with bed-load transport. … Whereas in the steep slope, debris flow occurs, in which high concentration sediments are rolled up to the free-surface. …

    京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B 63(B), 306-311, 2020-12

    IR 

  • Distribution of Slope Movements Caused by Typhoon Hagibis (TY1919) near Marumori Town, Miyagi Prefecture and Sanriku Coastal Area, Iwate Prefecture  [in Japanese]

    若月 強 , 吉原 直志 , 遠藤 悠一 , 大森 想 , 古賀 亘

    … The distribution of slope movement (e.g. slope failure, debris flow) was investigated by developing a trace map of sediment movements by air photo interpretation and field survey, and the rainfall distribution and geology were compared. …

    主要災害調査 = Natural Disaster Research Report (58), 1-14, 2020-12

    IR  DOI 

  • Sediment disasters in Kumamoto Prefecture by a heavy rainfall in July 2020  [in Japanese]

    地頭薗 隆 , 伊倉 万理 , 植 弘隆 , 大石 博之 , 垣本 毅 , 木藤 賢一 , 古賀 省三 , 坂井 佑介 , 坂島 俊彦 , 篠原 慶規 , 清水 収 , 田方 智 , 寺本 行芳 , 鳥田 英司 , 永谷 直昌 , 中濃 耕司 , 西脇 彩人 , 平川 泰之 , 福塚 康三郎 , 水野 秀明

    新砂防 = Journal of the Japan Society of Erosion Control Engineering : 砂防学会誌 73(4), 図巻頭2p,41-50, 2020-11

  • High tolerance land use against flood disasters : How paddy fields as previously natural wetland inhibit the occurrence of floods

    Osawa Takeshi , Nishida Takaaki , Oka Takashi

    … We used flow accumulation value (FAV) as an index of intact wetland habitat; … Results showed that paddy fields located in high FAV areas were able to significantly reduce flood frequencies, occurrences of landslides, and debris floods. …

    (114), 106306, 2020-07

    IR 

  • Fish proliferation and rare-earth deposition by topographically induced upwelling at the late Eocene cooling event

    Ohta Junichiro , Yasukawa Kazutaka , Nozaki Tatsuo , Takaya Yutaro , Mimura Kazuhide , Fujinaga Koichiro , Nakamura Kentaro , Usui Yoichi , Kimura Jun-Ichi , Chang Qing , Kato Yasuhiro

    … In this study, we used osmium isotope ratios to determine the depositional ages of pelagic clays extraordinarily rich in fish debris. … Much fish debris was deposited in the western North and central South Pacific sites roughly 34.4 million years ago, concurrent with a late Eocene event, a temporal expansion of Antarctic ice preceding the Eocene–Oligocene climate transition. …

    Scientific Reports (10), 9896, 2020-06-18

    IR 

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