Updated on 2024/04/04

写真a

 
SAKAI Yuichi
 
Organization
School of Agriculture Department of Forest Science Assistant Professor
Graduate School of Regional Development and Creativity Division of Engineering and Agriculture (Master's Course) Graduate Program in Forest Production and Conservation Assistant Professor
Title
Assistant Professor

Degree

  • 博士(農学) ( 2020.3   東京大学 )

Research Interests

  • 土砂災害

  • 土石流

Research Areas

  • Life Science / Forest science

Education

  • The University of Tokyo   農学生命科学研究科 博士課程   森林科学専攻

    2017.4 - 2020.3

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    Country: Japan

  • The University of Tokyo   農学生命科学研究科 修士課程   森林科学専攻

    2015.4 - 2017.3

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    Country: Japan

  • The University of Tokyo   農学部   森林生物科学専修

    2011.4 - 2015.3

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    Country: Japan

Research History

  • Utsunomiya University   農学部   Assistant Professor

    2022.1 - Present

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    Country:Japan

  • Kyoto University   理学研究科   Research associate of the Japan Society for the Promotion of Science

    2020.4 - 2021.12

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    Country:Japan

  • The University of Tokyo   農学生命科学研究科   Research associate of the Japan Society for the Promotion of Science

    2017.3 - 2020.3

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    Country:Japan

Professional Memberships

  • American Geophysical Union

    2021.8 - Present

  • 日本地質学会

    2021.7 - Present

  • 日本地球惑星科学連合

    2020.2 - Present

  • 日本森林学会

    2016.11 - Present

  • 砂防学会

    2015.2 - Present

Committee Memberships for Association and Group

  • 国土交通省関東地方整備局日光砂防事務所   総合評価審査分科会  

    2023.4 - 2024.3   

  • 砂防学会誌編集委員会   編集委員  

    2022.7 - Present   

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    Committee type:Academic society

  • 砂防学会誌編集委員会   編集委員  

    2022.7 - Present   

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    Committee type:Academic society

 

Papers

  • A numerical model for large-scale landslides based on digital elevation models Invited Reviewed

    Yuichi Sakai, Norifumi Hotta, Junichiro Tobe

    Proceedings of Eighth Geoinformation Science Symposium 2023: Geoinformation Science for Sustainable Planet   12977   363 - 370   2024.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1117/12.3009241

  • Flume experiments in the development of crevasse-splay deposits: Transition from asymmetric to symmetric geometry Reviewed

    Taichi Kato, Masaki Yamada, Hajime Naruse, Yuichi Sakai

    Journal of Sedimentary Research   2023.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.2110/jsr.2023.029

  • Laboratory investigation of the effects of grain size on the dynamics of debris flows: Measurement of pore fluid pressure in an open channel Reviewed

    Yuichi Sakai, Norifumi Hotta

    Proceedings of 8th International Conference on Debris Flow Hazard Mitigation   2023.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: https://doi.org/10.1051/e3sconf/202341501022

  • Effect of debris-flow sediment grain-size distribution on fan morphology Reviewed International coauthorship

    Haruka Tsunetaka, Norifumi Hotta, Yuichi Sakai, Thad Wasklewicz

    Earth Surface Dynamics   10 ( 4 )   775 - 796   2022.8

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    Language:English  

    DOI: 10.5194/esurf-10-775-2022

  • Twenty-five years of geomorphological evolution in the Gokurakudani Gully (Unzen Volcano): topography, subsurface geophysics and sediment analysis Reviewed

    Christopher Gomez, Yoshinori Shinohara, Haruka Tsunetaka, Norifumi Hotta, Balazs Bradak, Yuichi Sakai

    Geosciences   11 ( 11 )   2021.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/geosciences11110457

  • Multi-decadal changes in the relationships between rainfall characteristics and debris-flow occurrences in response to gully evolution after the 1990–1995 Mount Unzen eruptions Reviewed International journal

    Haruka Tsunetaka,Yoshinori Shinohara,Norifumi Hotta,Christopher Gomez,Yuichi Sakai

    Earth Surface Processes and Landforms   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/esp.5148

  • The effects of particle segregation on debris flow fluidity over a rigid bed Invited Reviewed International journal

    Norifumi Hotta,Tomoyuki Iwata,Takuro Suzuki,Yuichi Sakai

    Environmental & Engineering Geoscience   26 ( 4 )   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Geological Society of America  

    DOI: 10.2113/EEG-D-20-00106

  • Numerical simulation of debris flows focusing on the behavior of fine sediment Reviewed International journal

    Yuichi Sakai,Norifumi Hotta

    Proceedings of 7th International Conference on Debris Flow Hazards Mitigation: Mechanics, Prediction, and Assessment   421 - 428   2019.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.25676/11124/173051

  • Application of an MPS-based model to the formation process of debris flow fans Reviewed International journal

    Takuro Suzuki,Norifumi Hotta,Haruka Tsunetaka,Yuichi Sakai

    Proceedings of 7th International Conference on Debris Flow Hazards Mitigation: Mechanics, Prediction, and Assessment   871 - 878   2019.6

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.25676/11124/173051

  • Experimental examination for influence of debris flow hydrograph on development processes of debris flow fan Reviewed International journal

    Haruka Tsunetaka,Norifumi Hotta,Yuichi Sakai,Yuki Nishiguchi,Junya Hina

    Proceedings of 7th International Conference on Debris Flow Hazards Mitigation: Mechanics, Prediction, and Assessment   443 - 450   2019.6

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.25676/11124/173051

  • Effects of grain-size composition on flow resistance of debris flows: Behavior of fine sediment Reviewed International journal

    Yuichi Sakai,Norifumi Hotta, Takahiro Kaneko, Tomoyuki Iwata

    Journal of Hydraulic Engineering   145 ( 5 )   2019.5

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Society of Civil Engineers  

    DOI: 10.1061/(ASCE)HY.1943-7900.0001586

  • 土石流の流下波形が土石流扇状地の形成過程に及ぼす影響 Reviewed

    經隆悠,堀田紀文,酒井佑一,西口幸希,日名純也

    第9回土砂災害に関するシンポジウム論文集   115 - 120   2018.9

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

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MISC

  • 土石流の基礎的な実験における計測 Invited

    酒井佑一

    砂防学会誌   75 ( 2 )   17 - 22   2022.7

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  • Numerical investigation on flow transformation of sand-rich debris flow into turbidity current

    Yuichi Sakai, Hajime Naruse

    JpGU Meeting 2022 Abstracts   2022.5

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper, summary (international conference)  

  • 泥流の堆積機構:二層モデルに基づく検討

    酒井佑一,堀田紀文

    令和4年度砂防学会研究発表会概要集   2022.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)  

  • Flow transformation of subaqueous debris flows: Investigation of turbidity current generation based on a two-layered layer-averaged model

    Yuichi Sakai, Hajime Naruse

    AGU Fall Meeting 2021 Abstracts   2021.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper, summary (international conference)  

  • 水路実験による2019年千曲川氾濫での破堤堆積物形成過程の解明

    加藤汰一,山田昌樹,成瀬元,酒井佑一

    日本堆積学会2021年大会講演要旨   2021.11

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:日本堆積学会  

  • 砂質土石流のFlow transformation:二層浅水モデルに基づく混濁流生成メカニズムの検討

    酒井佑一,成瀬元

    日本地質学会第128年学術大会講演要旨   2021.9

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:日本地質学会  

  • Modeling sand-rich submarine debris flow: Sand deposition, turbidity current generation and separation

    Yuichi Sakai, Hajime Naruse

    JpGU Meeting 2021 Abstracts   2021.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper, summary (international conference)  

  • Flume experiment on crevasse-splay deposits formed by the 2019 flooding of the Chikuma River

    Taichi Kato, Masaki Yamada, Hajime Naruse, Yuichi Sakai

    JpGU Meeting 2021 Abstracts   2021.6

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    Language:English   Publishing type:Research paper, summary (international conference)  

  • 微細土砂の液相化を考慮した数値計算は崩壊起因土石流の再現に有効か?

    戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎

    令和3年度砂防学会研究発表会概要集   2021.5

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • 均一粒径土石流における流れの遷移:間隙水圧の測定

    酒井佑一,堀田紀文

    令和3年度砂防学会研究発表会概要集   2021.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • Laminar-turbulent transition in saturated granular free-surface flow

    Yuichi Sakai, Norifumi Hotta

    JpGU-AGU Joint Meeting 2020 Abstracts   2020.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper, summary (international conference)  

  • Laminar-turbulent transition in debris flow: measurement of basal pore fluid pressure in an open channel flow experiment

    Yuichi Sakai, Norifumi Hotta

    EGU General Assembly 2020 Abstracts   2020.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper, summary (international conference)  

  • 土石流の現地再現計算における微細土砂の液相化の影響

    戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎

    令和2年度砂防学会研究発表会概要集   2020.5

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • 粒径組成が土石流の流動機構に及ぼす影響

    酒井佑一,堀田紀文

    令和2年度砂防学会研究発表会概要集   2020.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • 雲仙普賢岳ガリー内の局所地形における土砂流出現象の観測

    阪本実紀,Christopher Gomez, 篠原慶規,經隆悠,堀田紀文,酒井佑一,北本楽

    2019年度砂防学会研究発表会概要集   2019.5

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • 土石流の堆積過程に粒径が及ぼす影響

    田澤直也,堀田紀文,酒井佑一

    2019年度砂防学会研究発表会概要集   2019.5

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • 微細土砂が土石流の流動機構に与える影響

    酒井佑一,堀田紀文

    2019年度砂防学会研究発表会概要集   2019.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • 微細土砂の液相化を考慮した現地再現計算における土石流の挙動

    戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎

    2019年度砂防学会研究発表会概要集   2019.5

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:砂防学会  

  • フィジーにおける洪水・土砂災害の情報収集と河川における土砂採掘が河川地形に与える影響に関する視察

    酒井佑一

    砂防学会誌   71 ( 5 )   86 - 87   2019.1

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:砂防学会  

  • 土石流実験のすすめ Invited

    酒井佑一

    水文・水資源学会誌   30 ( 6 )   408 - 408   2017.11

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:水文・水資源学会  

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Presentations

  • Numerical investigation on flow transformation of sand-rich debris flow into turbidity current International conference

    Yuichi Sakai, Hajime Naruse

    JpGU Meeting 2022  2022.5 

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    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  • 泥流の堆積機構:二層モデルに基づく検討

    酒井佑一,堀田紀文

    砂防学会  2022.5 

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    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  • Modeling sand-rich submarine debris flow: Sand deposition, turbidity current generation and separation International conference

    Yuichi Sakai, Hajime Naruse

    JpGU Meeting 2021  2021.6 

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    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Flow transformation of subaqueous debris flows: Investigation of turbidity current generation based on a two-layered layer-averaged model International conference

    Yuichi Sakai, Hajime Naruse

    AGU Fall Meeting 2021  2021.12 

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    Language:English   Presentation type:Poster presentation  

    Country:United States  

  • 水路実験による2019年千曲川氾濫での破堤堆積物形成過程の解明

    加藤汰一,山田昌樹,成瀬元,酒井佑一

    日本堆積学会  2021.11 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 砂質土石流のFlow transformation:二層浅水モデルに基づく混濁流生成メカニズムの検討

    酒井佑一,成瀬元

    日本地質学会  2021.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 微細土砂の液相化を考慮した数値計算は崩壊起因土石流の再現に有効か?

    戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎

    砂防学会  2021.5 

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    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  • 均一粒径土石流における流れの遷移:間隙水圧の測定

    酒井佑一,堀田紀文

    砂防学会  2021.5 

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    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  • Flume experiment on crevasse-splay deposits formed by the 2019 flooding of the Chikuma River International conference

    Taichi Kato, Masaki Yamada, Hajime Naruse, Yuichi Sakai

    JpGU Meeting 2021  2021.6 

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    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  • Laminar-turbulent transition in saturated granular free-surface flow International conference

    Yuichi Sakai, Norifumi Hotta

    JpGU-AGU Joint Meeting 2020  2020.5 

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    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  • 粒径組成が土石流の流動機構に及ぼす影響

    酒井佑一,堀田紀文

    砂防学会  2020.5 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 土石流の現地再現計算における微細土砂の液相化の影響

    戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎

    砂防学会  2020.5 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Laminar-turbulent transition in debris flow: measurement of basal pore fluid pressure in an open channel flow experiment International conference

    Yuichi Sakai, Norifumi Hotta

    EGU General Assembly 2020  2020.4 

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    Language:English   Presentation type:Poster presentation  

    Country:Austria  

  • 微細土砂の液相化を考慮した現地再現計算における土石流の挙動

    戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎

    砂防学会  2019.5 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 雲仙普賢岳ガリー内の局所地形における土砂流出現象の観測

    阪本実紀,Christopher Gomez, 篠原慶規,經隆悠,堀田紀文,酒井佑一,北本楽

    砂防学会  2019.5 

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    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  • 土石流の堆積過程に粒径が及ぼす影響

    田澤直也,堀田紀文,酒井佑一

    砂防学会  2019.5 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Application of an MPS-based model to the formation process of debris flow fans International conference

    Takuro Suzuki,Norifumi Hotta,Haruka Tsunetaka,Yuichi Sakai

    Proceedings of 7th International Conference on Debris Flow Hazards Mitigation: Mechanics, Prediction, and Assessment  2019.6 

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    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  • Experimental examination for influence of debris flow hydrograph on development processes of debris flow fan International conference

    Haruka Tsunetaka,Norifumi Hotta,Yuichi Sakai,Yuki Nishiguchi,Junya Hina

    Proceedings of 7th International Conference on Debris Flow Hazards Mitigation: Mechanics, Prediction, and Assessment  2019.6 

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    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  • Numerical simulation of debris flows focusing on the behavior of fine sediment International conference

    Yuichi Sakai, Norifumi Hotta

    Proceedings of 7th International Conference on Debris Flow Hazards Mitigation: Mechanics, Prediction, and Assessment  2019.6 

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    Language:English   Presentation type:Poster presentation  

    Country:United States  

  • 微細土砂が土石流の流動機構に与える影響

    酒井佑一,堀田紀文

    砂防学会  2019.5 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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Research Projects

  • 火山地帯で発生する多様な土砂災害にどう対応するか? -分野横断による新たな研究展開を目指して-

    2023.4 - 2024.3

    令和5年度京都大学防災研究所共同研究 

    酒井佑一、宮田秀介

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    Authorship:Principal investigator 

  • 流れの成層構造に着目した土石流中の粒子浮遊機構の解明と数値計算モデルへの実装

    Grant number:22K14452  2022.4 - 2025.3

    Grants-in-Aid for Scientific Research (KAKENHI)  Grant-in-Aid for Early-Career Scientists

    酒井佑一

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

  • 海底地すべり起因の土石流の流動機構の解明:流れの遷移を考慮した統一モデルの開発

    Grant number:20J00991  2020.4 - 2023.3

    Grants-in-Aid for Scientific Research (KAKENHI)  Grant-in-Aid for JSPS Fellows

    酒井佑一

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

  • 土石流の侵食・堆積に微細土砂の液相化が及ぼす影響の解明と数値計算への適用

    2017.4 - 2020.3

    Grants-in-Aid for Scientific Research (KAKENHI)  Grant-in-Aid for JSPS Fellows

    酒井佑一

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3100000 ( Direct Cost: \3100000 )

 

Class

  • 治山砂防学  B100415

    2023  ( Graduate School )

  • 基礎実験  A007074

    2023  ( University )

  • 農学部コア実習  G903700

    2023  ( University )

  • 森林水文学  A007185

    2023  ( University )

  • 砂防工学  A007062

    2023  ( University )

  • 砂防工学実習  A007227

    2023  ( University )

  • 治山砂防計画法  A007225

    2023  ( University )

  • 治山砂防学 

    2022  ( Graduate School )

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Academic Activities

  • 研究集会「地球表層における重力流のダイナミクス」

    Planning, management, etc.

    2022.12

  • 研究集会「地球表層における重力流のダイナミクス」

    Planning, management, etc.

    2022.12