Yamaguchi Naofumi 山口直文

Researcher Number	80634120
Other IDs
Affiliation (Current)	2025: 茨城大学, 基礎自然科学野, 講師 2025: 茨城大学, 地球・地域環境共創機構, 講師
Affiliation (based on the past Project Information) *help	2025: 茨城大学, 基礎自然科学野, 講師 2022 – 2023: 茨城大学, 地球・地域環境共創機構, 講師 2020 – 2021: 茨城大学, 地球・地域環境共創機構, 助教 2016 – 2019: 茨城大学, 広域水圏環境科学教育研究センター, 助教 2018: 茨城大学, 学内共同利用施設等, 助教
Review Section/Research Field	Principal Investigator Basic Section 17030:Human geosciences-related / Geology
Keywords	Principal Investigator 水路実験 / 堆積過程 / 津波堆積物 / 浅海堆積物 / 堆積構造 / 堆積速度 / ウェーブリップル / 非定常流 / 津波 / 地質学 / 時系列堆積過程 / 堆積物粒径

Research Projects
(4 results)
Research Products
(18 results)

複雑な粒度分布データから複数の堆積物輸送営力の向きを推定する解析手法の確立Principal Investigator
- Principal Investigator
  
  山口直文
- Project Period (FY)
  2025 – 2027
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 17030:Human geosciences-related
- Research Institution
  Ibaraki University
ウェーブリップルが地層に残される定量的条件の解明：浅海堆積物から分・秒を読み取るPrincipal Investigator
- Principal Investigator
  
  山口直文
- Project Period (FY)
  2021 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 17030:Human geosciences-related
- Research Institution
  Ibaraki University
Quantitative understanding of time-series sedimentation and erosion processes by tsunamis.Principal Investigator
- Principal Investigator
  
  Yamaguchi Naofumi
- Project Period (FY)
  2019 – 2023
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
- Research Field
  
  Geology
- Research Institution
  Ibaraki University
Time series analysis of depositional and erosional processes under tsunamiPrincipal Investigator
- Principal Investigator
  
  Yamaguchi Naofumi
- Project Period (FY)
  2016 – 2019
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Geology
- Research Institution
  Ibaraki University

All 2024 2023 2022 2020 2019 2018 2017

All Journal Article Presentation

[Journal Article] Logratio analysis of components separated from grain‐size distributions and implications for sedimentary processes: An?example of bottom surface sediments in a shallow lake2024
- Author(s)
  Yamaguchi Naofumi、Ando Tsuyoshi、Enokida Hirotaka、Nakada Natsumi、Yamaki Syota、Ohta Tohru
- Journal Title
  
  Sedimentology
  
  Volume: 71 Issue: 4 Pages: 1291-1304
- DOI
  10.1111/sed.13174
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21K03677
[Journal Article] Validation of appropriate estimation criteria for the number of components for separating a polymodal grain-size distribution into lognormal distributions2023
- Author(s)
  Yamaguchi Naofumi
- Journal Title
  
  Progress in Earth and Planetary Science
  
  Volume: 10 Issue: 1 Pages: 70-70
- DOI
  10.1186/s40645-023-00601-y
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21K03677
[Journal Article] 堆積物供給がウェーブリップルの形状に与える影響：造波水路実験（予報）2022
- Author(s)
  山口直文・滝　俊文・関口智寛
- Journal Title
  
  堆積学研究
  
  Volume: 80 Pages: 3-9
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21K03677
[Journal Article] Magma process of Gamano granodiorite in Ryoke belt, Yanai region, Yamaguchi, Southwest Japan2019
- Author(s)
  山口直文
- Journal Title
  
  The Journal of the Geological Society of Japan
  
  Volume: 125 Issue: 2 Pages: 167-182
- DOI
  10.5575/geosoc.2018.0046
- NAID
  130007660915
- ISSN
  0016-7630, 1349-9963
- Year and Date
  2019-02-15
- Language
  Japanese
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K17817, KAKENHI-PROJECT-16H02743, KAKENHI-PROJECT-19K21651, KAKENHI-PROJECT-15H03748, KAKENHI-PROJECT-18H01313, KAKENHI-PROJECT-18H01316
[Journal Article] Sedimentary Processes and the Distribution of Tsunami Deposits On a Narrow Coastal Lowland Backed By a Cliff in Flume Experiments2018
- Author(s)
  Yamaguchi Naofumi、Sekiguchi Tomohiro
- Journal Title
  
  Journal of Sedimentary Research
  
  Volume: 88 Issue: 4 Pages: 467-474
- DOI
  10.2110/jsr.2018.25
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K17817
[Presentation] 複雑な粒度分布を分離する際の成分数決定に適した評価基準の検討2023
- Author(s)
  山口直文
- Organizer
  日本堆積学会2023年新潟大会
- Data Source
  KAKENHI-PROJECT-21K03677
[Presentation] Storegga deposits at Howick Burn and their application to Low Frequency, High Magnitude risk assessment of Offshore Wind2023
- Author(s)
  Ben Pickett, Robert M. Dorrell, Jonathan Dean, Hajime Naruse, Naofumi Yamaguchi, Daniel R Parsons
- Organizer
  Japan Geoscience Union Meeting 2023
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18KK0378
[Presentation] 多峰性粒度分布から分離された粒径成分の特徴に基づく土砂動態の定量的推定：霞ヶ浦の湖底表層堆積物の例2023
- Author(s)
  山口直文・大内孝雄
- Organizer
  日本地球惑星科学連合2023年大会
- Data Source
  KAKENHI-PROJECT-21K03677
[Presentation] 霞ヶ浦西浦および北浦における湖底表層堆積物の粒径の特徴：対数正規分布成分への分離による解析2023
- Author(s)
  山口直文・大内孝雄
- Organizer
  日本地質学会第130年学術大会
- Data Source
  KAKENHI-PROJECT-21K03677
[Presentation] 多峰性粒度分布から分離された粒径成分の特徴と堆積過程への示唆：霞ヶ浦北浦の湖底表層堆積物の例2022
- Author(s)
  山口直文・安藤毅・榎木田浩孝・中田夏海・八巻翔太
- Organizer
  日本地球惑星科学連合2022年大会
- Data Source
  KAKENHI-PROJECT-21K03677
[Presentation] 簡便に粒度分布を成分分離する試み2022
- Author(s)
  山口直文
- Organizer
  日本堆積学会2022年オンライン大会
- Data Source
  KAKENHI-PROJECT-21K03677
[Presentation] 実験データから明らかになった混濁流と開水路における浮遊砂濃度と乱流構造の違い2020
- Author(s)
  福田壮二郎・Elena Bastianon・Bill McCaffrey・山口直文・成瀬　元・Robert Dorrell
- Organizer
  日本堆積学会2020年オンライン大会
- Data Source
  KAKENHI-PROJECT-18KK0378
[Presentation] 水路実験から見た津波堆積物の多様性2019
- Author(s)
  山口直文
- Organizer
  日本地球惑星科学連合2019年大会
- Invited
- Data Source
  KAKENHI-PROJECT-16K17817
[Presentation] 異なる粒径の津波堆積物に関する実験的検討：堆積過程と分布傾向の違い2019
- Author(s)
  篠崎鉄哉, 山口直文, 関口智寛
- Organizer
  2019年度津波堆積物研究会（東京）
- Data Source
  KAKENHI-PROJECT-16K17817
[Presentation] Characteristics of Sediment Entrainment and Transport Depending on Initial Water Depth under Tsunami-like Bore in Laboratory Experiments2018
- Author(s)
  Yamaguchi, N., Suzuki, T., Shinozaki, T. and Sekiguchi, T.
- Organizer
  AGU Fall Meeting 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17817
[Presentation] Variety of Sedimentary Process and Distribution of Tsunami Deposits in Laboratory Experiments2017
- Author(s)
  Yamaguchi Naofumi, Sekiguchi Tomohiro
- Organizer
  AGU Fall Meeting 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17817
[Presentation] Effects of terrestrial topography on sedimentary processes and distribution of tsunami deposits: two cases of flume experiments2017
- Author(s)
  Yamaguchi Naofumi, Sekiguchi Tomohiro
- Organizer
  JpGU-AGU Joint Meeting 2017
- Data Source
  KAKENHI-PROJECT-16K17817
[Presentation] 背後に崖がある沿岸低地における津波堆積物の形成過程と分布：水路実験による検討2017
- Author(s)
  山口直文・関口智寛
- Organizer
  日本堆積学会
- Place of Presentation
  信州大学（長野県松本市）
- Year and Date
  2017-03-26
- Data Source
  KAKENHI-PROJECT-16K17817

Yamaguchi Naofumi 山口 直文

Research Projects

Research Products

複雑な粒度分布データから複数の堆積物輸送営力の向きを推定する解析手法の確立Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

ウェーブリップルが地層に残される定量的条件の解明：浅海堆積物から分・秒を読み取るPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Quantitative understanding of time-series sedimentation and erosion processes by tsunamis.Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Time series analysis of depositional and erosional processes under tsunamiPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Logratio analysis of components separated from grain‐size distributions and implications for sedimentary processes: An?example of bottom surface sediments in a shallow lake2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Validation of appropriate estimation criteria for the number of components for separating a polymodal grain-size distribution into lognormal distributions2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] 堆積物供給がウェーブリップルの形状に与える影響：造波水路実験（予報）2022

Author(s)

Journal Title

Data Source

[Journal Article] Magma process of Gamano granodiorite in Ryoke belt, Yanai region, Yamaguchi, Southwest Japan2019

Author(s)

Journal Title

DOI

NAID

ISSN

Year and Date

Language

Data Source

[Journal Article] Sedimentary Processes and the Distribution of Tsunami Deposits On a Narrow Coastal Lowland Backed By a Cliff in Flume Experiments2018

Author(s)

Journal Title

DOI

Data Source

[Presentation] 複雑な粒度分布を分離する際の成分数決定に適した評価基準の検討2023

Author(s)

Organizer

Data Source

[Presentation] Storegga deposits at Howick Burn and their application to Low Frequency, High Magnitude risk assessment of Offshore Wind2023

Author(s)

Organizer

Data Source

[Presentation] 多峰性粒度分布から分離された粒径成分の特徴に基づく土砂動態の定量的推定：霞ヶ浦の湖底表層堆積物の例2023

Author(s)

Organizer

Data Source

[Presentation] 霞ヶ浦西浦および北浦における湖底表層堆積物の粒径の特徴：対数正規分布成分への分離による解析2023

Author(s)

Organizer

Data Source

[Presentation] 多峰性粒度分布から分離された粒径成分の特徴と堆積過程への示唆：霞ヶ浦北浦の湖底表層堆積物の例2022

Author(s)

Organizer

Data Source

[Presentation] 簡便に粒度分布を成分分離する試み2022

Author(s)

Organizer

Data Source

[Presentation] 実験データから明らかになった混濁流と開水路における浮遊砂濃度と乱流構造の違い2020

Yamaguchi Naofumi 山口直文