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Dr. (Eng.) / 博士(工学)
Associate Professor, Department of Civil Engineering, Kobe University, Japan
神戸大学大学院市民工学専攻 准教授
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For inquiry to Ryota TSUBAKI, use the inquiry form.
Research interest: 研究テーマ
Research interest: 研究テーマ
Understanding the development process of river geomorphology and managing river geomorphology by utilizing natural processes: 河川の地形変化の予測と制御
Understanding the development process of river geomorphology and managing river geomorphology by utilizing natural processes: 河川の地形変化の予測と制御
Keywords: Gravel bed rivers, vegetation, numerical simulation
High-resolution inundation flow simulation and its application to mitigate physical and environmental risks: 高解像度洪水氾濫流解析と、その解析で評価される洪水氾濫流の水理特性に着目した物理的被害や環境への影響の評価と緩和
High-resolution inundation flow simulation and its application to mitigate physical and environmental risks: 高解像度洪水氾濫流解析と、その解析で評価される洪水氾濫流の水理特性に着目した物理的被害や環境への影響の評価と緩和
Keywords: LiDAR, DEM, Finite volume method, Unstructured grid, railway, urban, mountainous
Advanced field monitoring of fluid flow and sediment transport in flooding rivers: 洪水中の河川の流れ・土砂・物質輸送の実測方法の開発と発展
Advanced field monitoring of fluid flow and sediment transport in flooding rivers: 洪水中の河川の流れ・土砂・物質輸送の実測方法の開発と発展
Keywords: Flow visualization, acoustic, pressure, sediment transport, turbulence, gravel bed rivers
Lab members: 研究室メンバー紹介
Lab members: 研究室メンバー紹介
Ryota TSUBAKI/ 椿 涼太
Ryota TSUBAKI/ 椿 涼太
Sefat Karimullah (Research associate, Nagoya University)
Sefat Karimullah (Research associate, Nagoya University)
Noe KIMURA/木村乃依 (M1)：流砂環境の再生のための自己調節型の土砂供給システムに関する基礎的研究
Noe KIMURA/木村乃依 (M1)：流砂環境の再生のための自己調節型の土砂供給システムに関する基礎的研究
Maho ISHIHARA/石原真歩 (M1)：中小洪水による網状礫河川の形状変化制御に向けた流速分布計測の現地計測方法の確立
Maho ISHIHARA/石原真歩 (M1)：中小洪水による網状礫河川の形状変化制御に向けた流速分布計測の現地計測方法の確立
Koki TSURUNAGA/鶴長晃樹 (B4)：過去から現在に至る河道地形および河川生物生息環境の中長期実態分析
Koki TSURUNAGA/鶴長晃樹 (B4)：過去から現在に至る河道地形および河川生物生息環境の中長期実態分析
Taichi MIYAURA/宮浦太一 (B4)：中山間地と水害
Taichi MIYAURA/宮浦太一 (B4)：中山間地と水害
Miku HANIOKA/埴岡光来 (B4)：部分的河道拡幅と通過土砂
Miku HANIOKA/埴岡光来 (B4)：部分的河道拡幅と通過土砂
Naoya OSHIMA/大島尚也 (B4)：河川の風波
Naoya OSHIMA/大島尚也 (B4)：河川の風波
Recent activities
Recent activities
名古屋大学の秋修了の学位授与式に参加してきました (2026/9)
名古屋大学の秋修了の学位授与式に参加してきました (2026/9)
Sefatさんの博士号が無事に授与されました．国際プログラムの歓送会にも参加しました．留学生のかたは，2年，3年いろんな経験をしてあっという間なんだろうな．国内ツアーで沼津港や狩野川を見に行ったのもふと思い出しました
向かう途中に，在来線3/4番ホームのきしめんを
土木学会全国大会@札幌に参加してきました (2026/9)
土木学会全国大会@札幌に参加してきました (2026/9)
ホテルから会場までの間に流れいる豊平川の砂州．神戸の都市河川の防災に関する話題を1件発表しました．名古屋大学の学生さんの雄姿もみられました
中島公園近くの小河川．水量がしっかりある．
鳥居が味わい深い神社
特別講演会で紹介された米粉麺やさんComen．企画力と推進力が大事なんだと感じました．
Visited Lausanne and the surrounding area to see river engineering works (August 2026)
Visited Lausanne and the surrounding area to see river engineering works (August 2026)
Génie civil: Civil engineering in French.
Visited Lausanne, CH, to visit Prof. Giovanni at EPFL, and see several river engineering works around the city.
Visited were from mountainous check dam, upstream and middle reach river restoration sites.
Also visited a diving section of the combined sewer system. Running water finally flows into Lake Leman.
Had a meeting at the campus.
The lake is good to see and swim. Wild blackberries were also very fine and fresh.
Study supervision
Study supervision
Description of selected papers
Description of selected papers
Image motion analysis of sediment particles migrating on dunes
Image motion analysis of sediment particles migrating on dunes
Tsubaki, R., Baranya, S., Muste, M. and Toda, Y.: Spatio-temporal patterns of sediment particle movement on 2D and 3D bedforms, Experiments in Fluids, Vol. 59, No. 93, 2018. Post-print, View-only-version.
Flood Risk Assessment of the Middle Reach of the Helmand River, Afghanistan
Flood Risk Assessment of the Middle Reach of the Helmand River, Afghanistan
K Sefat, R Tsubaki: Flood Risk Assessment of the Middle Reach of the Helmand River, Afghanistan, Journal of Disaster Research 19 (2), 455-464, 2024. Journal link.
A glacial lake outburst flood risk assessment for the Phochhu river basin, Bhutan
A glacial lake outburst flood risk assessment for the Phochhu river basin, Bhutan
T Wangchuk, R Tsubaki: A glacial lake outburst flood risk assessment for the Phochhu river basin, Bhutan, Natural Hazards and Earth System Sciences 24 (7), 2523-2540, 2024. Journal link.
Effects of vegetation distribution along river transects on the morphology of a gravel bed braided river
Effects of vegetation distribution along river transects on the morphology of a gravel bed braided river
R Zhu, R Tsubaki, Y Toda: Effects of vegetation distribution along river transects on the morphology of a gravel bed braided river, Acta Geophysica, 72 (2), 1097-1112, 2024. Journal link.
Impact Assessment of Flushing Flow from a Dam to Invasive Aquatic Plant Egeria densa in a Gravel-bed River
Impact Assessment of Flushing Flow from a Dam to Invasive Aquatic Plant Egeria densa in a Gravel-bed River
R Tsubaki, Y Kawahara, Y Mizuguchi: Impact Assessment of Flushing Flow from a Dam to Invasive Aquatic Plant Egeria densa in a Gravel-bed River, KSCE Journal of Civil Engineering 28 (3), 1062-1074, 2024. Journal link.
Experiment to clarify the condition of railway embankment scour
Experiment to clarify the condition of railway embankment scour
Tsubaki, R., Kawahara, Y. and Ueda, K.: Railway embankment failure due to ballast layer breach caused by inundation flows, Natural Hazards, Vol. 87, No. 2, doi: 10.1007/s11069-017-2789-3, 2017, Post-print, Journal link.
Fragility curve for railway embankment scour
Fragility curve for railway embankment scour
Tsubaki, R., Bricker, J.D., Ichii, K. and Kawahara, Y.: Development of fragility curves for railway embankment and ballast scour due to overtopping flow, Natural Hazards and Earth System Sciences, EGU, Vol. 16, 2455-2472, doi:10.5194/nhess-16-2455-2016, Paper.
Sediment budgeting using detailed bathymetry maps: Acoustic mapping velocimetry (AMV)
Sediment budgeting using detailed bathymetry maps: Acoustic mapping velocimetry (AMV)
Muste, M., Baranya, S., Tsubaki, R., Kim, D., Ho, H., Tsai, H. and Law, D.: Acoustic mapping velocimetry, Water Resources Research, Vol. 52, doi: 10.1002/2015WR018354, 2016.5, Journal link, Paper.
Spatial interpolation of river ADCP data
Spatial interpolation of river ADCP data
Tsubaki, R., Kawahara, Y., Muto, Y. and Fujita, I.: New 3-D flow interpolation method on moving ADCP data, Water Resources Research, Abstract, Paper, Repository
Development of image based flow measurement method and utilization to open water flow analysis
Development of image based flow measurement method and utilization to open water flow analysis
Multi-camera large-scale particle image velocimetry
Multi-camera large-scale particle image velocimetry
Tsubaki, R.: Multi-camera large-scale particle image velocimetry. Measurement Science and Technology, doi: 10.1088/1361-6501/ab85d5, 2020, Post-print, Journal link.
On the Texture Angle Detection Used in Space-Time Image Velocimetry
On the Texture Angle Detection Used in Space-Time Image Velocimetry
Tsubaki, R.: On the Texture Angle Detection Used in Space-Time Image Velocimetry (STIV), Water Resources Research, Vol. 53(12), doi: 10.1002/2017WR021913, pp.10908-10914, 2017, Post-print, Journal link.
Smartphone apps for river flow measurement (LSPIV apps for iOS and Android)
Smartphone apps for river flow measurement (LSPIV apps for iOS and Android)
Tsubaki, R., Fujita, I., Yu, K. and Muste, M.: Large-scale particle image velocimetry (LSPIV) implementation on smartphone, Proceedings of 36th IAHR congress, ISBN: 978-90-824846-0-1, Paper number 3874 on WEB site, Hague, Netherlands, June 28, 2015. Link
Innovation on river monitoring and its application on eco-hydraulics assessment
Innovation on river monitoring and its application on eco-hydraulics assessment
Development and refinement of methods for measuring water and sediment flow during floods, and assessment of their impact on river ecosystems (riparian and aquatic plants and attached algae)
Development and refinement of methods for measuring water and sediment flow during floods, and assessment of their impact on river ecosystems (riparian and aquatic plants and attached algae)
Compact geophone
Compact geophone
Tsubaki, R., Kawahara, Y., Zhang, X and Tsuboshita, K.: A new geophone device for understanding environmental impacts caused by gravel bedload during artificial floods, Water Resources Research, Vol. 53, doi: 10.1002/2016WR019726, 2017, Journal link, Paper, Post-print.
Flood inundation flow modeling
Flood inundation flow modeling
Railway embankment overtopping
Railway embankment overtopping
Uncertainty assessment of the calculated result
Uncertainty assessment of the calculated result
Tsubaki, R. and Kawahara, Y.: The uncertainty of Local Flow Parameters During Inundation Flow Over Complex Topographies with Elevation Errors, Journal of Hydrology, Vol.486, 2013. Journal link, Repository
Mesh generation using LiDAR data
Mesh generation using LiDAR data
Tsubaki, R., Fujita, I.: Unstructured grid generation using LiDAR data for urban flood inundation modelling, Hydrological Processes, Vol. 24, No. 11, pp. 1404-1420, 2010, Abstract, Paper, Repository
Investigation of flow in a channel in Japanese garden
Investigation of flow in a channel in Japanese garden
Tsubaki, R., Nakayama, Y. and Fujita, I.: The design secret of Kyokusui-no-En's meandering channel, Journal of Visualization, Vol. 11, No. 3, pp. 265-272, 2008.7. Abstract, Repository
River flow
River flow
Morphological evolution of river topography
Morphological evolution of river topography
Flow with vegetation
Flow with vegetation
Numerical flow simulation (CFD)
Numerical flow simulation (CFD)
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