Updated on 2024/04/21

写真a

 
YOSHIDA Keisuke
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
Profile

大学ホームページ1：https://soran.cc.okayama-u.ac.jp/html/ac32912fdfcb828774506e4da22f6611_ja.html

大学ホームページ2：http://www.cc.okayama-u.ac.jp/~yoshida_k/

 

External link

Degree

  • 博士(工学) ( 京都大学 )

Research Interests

  • 環境流体工学

  • 河川工学

  • 数値流体力学

  • 防災工学

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Hydroengineering

Education

  • Kyoto University   工学研究科   環境地球工学専攻

    - 2005

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    Country： Japan

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  • Kyoto University   工学研究科   環境地球工学専攻

    - 2002

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    Country： Japan

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  • Kyoto University   工学部   地球工学科

    - 2000

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    Country： Japan

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Research History

  • Okayama University   Associate Professor

    2012.4

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  • Chiba Institute of Technology   Assistant Professor

    2009.4 - 2012.3

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  • Tokyo Institute of Technology   Researcher

    2005.4 - 2009.3

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Professional Memberships

  • International Association for Hydro-Environment Engineering and Research

    2013.4

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  • THE JAPAN SOCIETY OF FLUID MECHANICS

    2011.4

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  • Japan Society of Civil Engineers

    2000.4

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Committee Memberships

  • 土木学会   土木学会論文集水圏工学編集小委員会委員  

    2023.6 - 2025.5   

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    Committee type：Academic society

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  • 土木学会 土木情報学委員会   デジタルツインを活用した流域治水に関する研究 小委員会  

    2022.6 - 2024.5   

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    Committee type：Academic society

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  • 国土交通省中国地方整備局 ダム等管理フォローアップ委員会   委員  

    2020.4   

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  • 国土交通省中国地方整備局 小田川堤防調査委員会   委員  

    2018.4   

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  • 土木学会 水工学委員会   委員  

    2017.5 - 2021.4   

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  • 土木学会 応用力学委員会   委員  

    2016.12   

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  • 土木学会 水工学委員会 基礎水理部会   委員  

    2013.3   

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  • 日本流体力学会   学会誌「ながれ」編集委員  

    2011.4 - 2020.3   

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    Committee type：Academic society

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Papers

  • NUMERICAL REPRODUCTION OF OVERTHROW OF BAMBOO FOREST AND WASHOUT OF WOODY VEGETATION DURING FLOODING USING ESTIMATION OF THREE－DIMENSIONAL PROFILE OF VEGETATION DRAG FORCE WITH AERIAL LASER DATA AND FLOOD SIMULATION Reviewed

    Ryo FURUTANI, Keisuke YOSHIDA, Takumi OKADA, Yuki KAJIKAWA, Satoshi NISHIYAMA

    Japanese Journal of JSCE   80 ( 16 )   23-16161   2024

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    Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

    DOI： 10.2208/jscejj.23-16161

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  • CLASSIFICATION OF PHYTOPLANKTON GROUPS USING A MULTI-WAVELENGTH EXCIATION FLUOROMETER WITH RANDOM FOREST Reviewed

    Hiroshi YAJIMA, Yo FUJII, Shogo SUGAHARA, Keisuke YOSHIDA

    Japanese Journal of JSCE   80 ( 16 )   23-16032   2024

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

    DOI： 10.2208/jscejj.23-16032

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  • DEEP LEARNING OF UNDERWATER IMAGES AND TRAINING DATA CRITERIA FOR UNDERSTANDING FEEDING INJURY OF ACANTHOPAGRUS SCHLEGELII IN NORI SEAWEED FARMS Reviewed

    Keisuke YOSHIDA, Shijun PAN, Takahiro YOKOYAMA, Yasushi YAMASHITA, Yuki UEDA, Hiroyuki SUGINO, Takashi KOJIMA

    Japanese Journal of JSCE   80 ( 16 )   23-16150   2024

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

    DOI： 10.2208/jscejj.23-16150

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  • Mutual validation of remote hydraulic estimates and flow model simulations using UAV-borne LiDAR and deep learning-based imaging techniques Reviewed

    Md Touhidul Islam, Keisuke Yoshida, Satoshi Nishiyama, Koichi Sakai

    Results in Engineering   20   101415 - 101415   2023.12

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

    DOI： 10.1016/j.rineng.2023.101415

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  • Detection and Segmentation of Riparian Asphalt Paved Cracks Using Drone and Computer Vision Algorithms Reviewed

    Shijun PAN, Keisuke YOSHIDA, Satoshi NISHIYAMA

    Intelligence, Informatics and Infrastructure   4 ( 2 )   35 - 49   2023.12

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

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  • Application of the Prompt Engineering-assisted Generative AI for the Drone-based Riparian Waste Detection Reviewed

    Shijun PAN, Keisuke YOSHIDA, Takashi KOJIMA

    Intelligence, Informatics and Infrastructure   4 ( 2 )   50 - 59   2023.12

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  • Three-dimensional numerical modelling of floods in river corridor with complex vegetation quantified using airborne LiDAR imagery Reviewed

    Keisuke Yoshida, Yuki Kajikawa, Satoshi Nishiyama, Md. Touhidul Islam, Shin Adachi, Koichi Sakai

    Journal of Hydraulic Research   61 ( 1 )   88 - 108   2023.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

    DOI： 10.1080/00221686.2022.2106596

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  • Promises and uncertainties in remotely sensed riverine hydro‐environmental attributes: Field testing of novel approaches to unmanned aerial vehicle‐borne lidar and imaging velocimetry Reviewed

    Md. Touhidul Islam, Keisuke Yoshida, Satoshi Nishiyama, Koichi Sakai, Shin Adachi, Shijun Pan

    River Research and Applications   38 ( 10 )   1757 - 1774   2022.12

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

    Recent advancements in remotely sensed techniques have markedly expanded data acquisition potential in riverine studies, but the techniques' applicability must be validated and improved because of uncertainties associated with diverse field conditions. This study is the first experimental evidence of using a newly designed unmanned aerial vehicle (UAV)-borne green lidar system (GLS) and deep learning-automated space–time image velocimetry (STIV) for remote investigation of hydraulic and vegetation quantities of the gravel-bed Asahi River in Okayama Prefecture, Japan. In addition to identifying bed deformation in waters shallower than 2 m, the GLS point clouds characterized the submerged infrastructure with block detailing patterns, thereby identifying positional displacement and severely damaged parts. This paper also presents a noncontact method of estimating incremental river discharge. Compared to benchmarked flow model estimates, remotely sensed discharges for three transects covering shallower, deeper, and partially submerged woody vegetation areas were overestimated by 1–11%, with 4% underestimation for another cross-section. The STIV analysis also showed complicated flow patterns that were reasonably confirmed by flow vectors from depth-averaged modeling. Ultimately, depth-averaged flow model estimates validated hydraulic parameters derived remotely from GLS and STIV, and vice versa. In addition to approximating vegetation growth rates, the study using GLS attributes accurately identified riparian vegetation types as herbaceous (70%), woody (86%), and bamboo groves (65%). Finally, our findings provide insight into the management of shallow clear-flowing vegetated rivers and remote sensing of streamflow to validate hydrodynamic-numerical methods.

    DOI： 10.1002/rra.4042

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    Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/rra.4042

  • 堤防越水場に設置した裏法面被覆工の不陸が流体力特性へ及ぼす影響に関する研究 Reviewed

    飯干富広, 佐々木海音, 安達森, 忰熊公子, 吉田圭介

    土木学会論文B1(水工学)   78 ( 2 )   I_655 - I_660   2022.11

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  • PROJECT EVALUATION OF CROSS-SECTIONAL EXCAVATION WORK OF A SANDBAR IN THE ASAHI RIVER TIDAL ZONE FOR EXPANSION OF AYU SPAWNING BED AREA Reviewed

    YOSHIDA Keisuke, ADACHI Maya, YAJIMA Hiroshi, YAMASHITA Yasushi, ADACHI Shin, FUJII Yo

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   78 ( 2 )   I_1111 - I_1116   2022.11

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

    In order to increase the spawning bed area of Ayu in the Heidan area of the Asahi River tidal zone, a portion of a sandbar around a natural spawning ground was excavated and a new artificial spawning ground (sub-current channel) was constructed under normal flow conditions in a project. For this study, field observations and numerical calculations were conducted to examine the suitability of the hydraulic environment of the artificial spawning area creation. Additionally, we examined the impacts of the construction on the existing natural spawning habitat. Results showed that the suitable spawning area was an area where there was no salinity increase at any time, and that the river bed grain size, water depth during spawning time, and current velocity were within the suitable values proposed in previous works. Results also presented that the spawning density in the constructed area might be more dependent on the suitability of the grain size than on the flow regime. Furthermore, the results of high-resolution 2D horizontal calculations showed that the creation of the new spawning area did not significantly alter the hydraulic environment of the existing natural spawning grounds, and contributed to the increase in spawning bed area, which was the original purpose of the project.

    DOI： 10.2208/jscejhe.78.2_i_1111

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  • 旭川中原橋周辺の河道形状及び植生分布の違いが更正係数に与える影響に関する数値的検討 Reviewed

    安達森, 梶川勇樹, 吉田圭介, 西山哲

    土木学会論文B1(水工学)   78 ( 2 )   I_1153 - I_1158   2022.11

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  • The application of drone-assisted deep learning technology in riverbank garbage detection Reviewed

    Shijun PAN, Keisuke YOSHIDA, Afia S. BONEY, Satoshi NISHIYAMA

    Journal of JSCE, B1   78 ( 2 )   I_133 - I_138   2022.11

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

    DOI： 10.2208/jscejhe.78.2_i_133

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  • 水中カメラの画像と深層学習による魚道を遡上する稚アユの検出に関する検討 Reviewed

    潘是均, 古谷崚, 吉田圭介, 山下泰司, 小島崇, 白神義章

    土木学会論文B1(水工学)   78 ( 2 )   I_127 - I_132   2022.11

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  • Drone-LiDAR-assisted Image Fusion methodology for Deep Learning-based Land Cover Classification Reviewed

    Shijun PAN, Keisuke YOSHIDA, Takashi KOJIMA, Satoshi NISHIYAMA

    Intelligence, Informatics and Infrastructure   3 ( 3 )   15 - 25   2022.11

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

    This study uses an unmanned aircraft mounted green Light Detection and Ranging (LiDAR) system to verify the learnability associated with deep learning regarding land cover classification (i.e., evaluated by the average and the absolute difference value of label-based F1, overall accuracy or Macro F1 under the premise of cross-seasonal mutual-prediction). Image fusion method in this study mainly attempts to superimpose the visualized LiDAR data with the aerial photographs to provide new features. LiDAR data are visualized using high contrast color scale (default), average high contrast color scale (same color, different split points as default), and high contrast gray color scale (different color, same split points as default). The reason of setting these methods is to compare the impact of split points and point-associated color in the color scale on learnability of cross-seasonal data. It is worth noting, however from the view of the results, that relying solely on aerial photographs is not sufficient, comparing with image fusion method, especially when training and predicting using cross-seasonal data. From the comparison of the label-based F1, this study has proved the necessary impact of LiDAR on vegetation label-based land cover classification.

    DOI： 10.11532/jsceiii.3.3_15

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  • YoloV5 analysis for juvenile ayu detection in underwater images of fishway Reviewed

    Shijun Pan, Ryo Furutani, Keisuke Yoshida

    Proc. of the 2022 Int. Symp. on Ecohydraulics   2022.10

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  • Using airborne lidar bathymetry-aided transfer learning method in riverine land cover classification Reviewed

    Shijun Pan, Keisuke Yoshida, Takashi Kojima

    Proc. of the 2022 Int. Symp. on Ecohydraulics   2022.10

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  • Developing 3-D numerical flood flow model for vegetated rivers: A case study for lower Asahi River flooding in Japan Reviewed

    Md. Touhidul Islam, Keisuke Yoshida, Yuki Kajikawa, Satoshi Nishiyama

    Proc. of 39th IAHR World Congress   2022.6

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  • Novel UAV-borne green LiDAR versus traditional airborne LiDAR: A case study to characterize hydraulic and riparian vegetation attributes Reviewed

    Md. Touhidul Islam, Keisuke Yoshida, Satoshi Nishiyama, Koichi Sakai

    Proc. of 39th IAHR World Congress   2022.6

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  • Airborne LiDAR-assisted deep learning methodology for riparian land cover classification using aerial photographs and its application for flood modelling Reviewed

    Keisuke Yoshida, Shijun Pan, Junichi Taniguchi, Satoshi Nishiyama, Takashi Kojima, Md. Touhidul Islam

    Journal of Hydroinformatics   24 ( 1 )   179 - 201   2022.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：IWA Publishing  

    <title>Abstract</title>
    In response to challenges in land cover classification (LCC), many researchers have experimented recently with classification methods based on artificial intelligence techniques. For LCC mapping of the vegetated Asahi River in Japan, the current study uses deep learning (DL)-based DeepLabV3+ module for image segmentation of aerial photographs. We modified the existing model by concatenating data on its resultant output port to access the airborne laser bathymetry (ALB) dataset, including voxel-based laser points and vegetation height (i.e. digital surface model data minus digital terrain model data). Findings revealed that the modified approach improved the accuracy of LCC greatly compared to our earlier unsupervised ALB-based method, with 25 and 35% improvement, respectively, in overall accuracy and the macro F1-score for November 2017 dataset (no–leaf condition). Finally, by estimating flow-resistance parameters in flood modelling using LCC mapping-derived data, we conclude that the upgraded DL methodology produces better fit between numerically analyzed and observed peak water levels.

    DOI： 10.2166/hydro.2022.134

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  • Characterizing vegetated rivers using novel unmanned aerial vehicle‐borne topo‐bathymetric green lidar: Seasonal applications and challenges Reviewed

    Md. Touhidul Islam, Keisuke Yoshida, Satoshi Nishiyama, Koichi Sakai, Tomoyuki Tsuda

    River Research and Applications   38 ( 1 )   44 - 58   2022.1

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1002/rra.3875

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    Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/rra.3875

  • 旭川の感潮域におけるアユの好適な産卵場の検討 Reviewed

    足立真綾, 吉田圭介, 矢島啓, 山下泰司

    土木学会論文B1(水工学)   77 ( 2 )   I_1429 - I_1434   2021.12

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  • UAVレーザ点群と航空写真を併用した深層学習による河道の地被分類法の検討 Reviewed

    野村碧都, 吉田圭介, 谷口純一

    土木学会論文B1(水工学)   77 ( 2 )   I_913 - I_918   2021.12

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  • Flood risk assessment in vegetated lower Asahi River of Okayama Prefecture in Japan using airborne topo-bathymetric LiDAR and depth-averaged flow model Reviewed

    Keisuke Yoshida, Kimihisa nagata, Shiro maeno, Koji mano, Satoshi nishiyama, Md. Touhidul Islam

    Journal of Hydro-environment Research   39   39 - 59   2021.10

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    This paper describes application of airborne LiDAR bathymetry (ALB) with near-infrared and green pulsed lasers for gathering distributed vegetation conditions and topo-bathymetric data for rivers. For the lower Asahi River of Okayama Prefecture in Japan, the ALB data validity was verified using field observation data. This study also examined the applicability of ALB data for numerical simulations of the lower Asahi River flooding in early July 2018 in Japan, comparing simulated and observed data. Results demonstrated that the methodology for this study works well for parameterization of distributed vegetation on a reach scale. This study also applied numerical tests to investigate the effects of vegetation establishment on flood control plans for the lower Asahi River using parameters validated for flood flow simulations. Results demonstrate that the predicted water level markedly exceeds the high water level because of thick vegetation presently established along few-kilometerlong upstream sections of the targeted river reach. Therefore, we conclude that the present findings can support cost-effective management tasks for vegetated rivers.

    DOI： 10.1016/j.jher.2021.06.005

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  • Model-induced comparative study of ALB and UAV-borne green LiDAR systems on vegetated lower Asahi river assessment in Japan Reviewed

    Md. Touhidul ISLAM, Keisuke YOSHIDA, Koichi SAKAI, Satoshi NISHIYAMA, Tomoyuki TSUDA, Kimishisa NAGATA and Shiro MAENO

    土木学会論文集B1(水工学)   76 ( 2 )   I_529 - I_534   2020.12

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  • ALB-ASSISTED DEEP LEARNING OF AERIAL PHOTOGRAPHS FOR LAND-COVER CLASSIFICATION IN RIVERS Reviewed

    YOSHIDA Keisuke, TANIGUCHI Junichi, PAN Shijun, KOJIMA Takashi, NAGATA Kimihisa, WATANABE Akihide

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   76 ( 2 )   I_1003 - I_1008   2020.12

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

    Land cover classification (LCC) map in rivers is one of the important fundamental materials for hydraulic research works and practical tasks in terms of both flood control and water environment conservation. Recently, massive flooding because of heavy rainfall motivates hydraulic engineers to estimate the flow capacity at local river sections accurately by re-evaluating the LCC map of the cross-sectional area, vegetation height, and vegetation density, using useful remote sensing methods such as airborne laser bathymetry (ALB). For this work, we developed a new methodology for land cover classification (water area, bare ground, herbaceous species, arborous species, and bamboo grove) in rivers. We used an image processing technique of deep convolutional neural networks (DCNNs) for aerial photographs taken during ALB measurements in conjunction with the dataset of laser point cloud and vegetation height (digital surface model data minus digital terrain model data). We applied our method to two flights of ALB measurement data (in March 2017 and November 2017) for the 4.5 km-long lower reach of the Asahi River. Results showed that our method predicts the LCC map more accurately in case of support of the ALB dataset, especially for detection of herbaceous species, compared with predictions using aerial photographs only. However, if we use different season dataset for learning and prediction processes, classification performance is degraded largely for arborous species because of defoliation.

    DOI： 10.2208/jscejhe.76.2_i_1003

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  • 平成30 年7月豪雨時の旭川分流堰周辺の植生分布を考慮した3次元洪水流解析 Reviewed

    吉田圭介,梶川勇樹,永田貴美久,西山哲,間野耕司,堺浩一,Md. Touhidul ISLAM,児子真也

    土木学会論文集B1(水工学)   76 ( 2 )   I_985 - I_990   2020.12

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  • Verification of STIV analysis of flood discharge at Nakano observatory in the Ota River by flow analysis using ALB data Reviewed

    K. Yoshida, S. Nigo, S. Maeno, K. Mano, M. Nakano

    Proc. 22nd IAHR-APD Congress   2020.9

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  • Flood simulation model coupled with woody vegetation wash-out in the lower Asahi River Reviewed

    K. Nagata, K. Yoshida, S. Maeno, S. Nigo, MD. T. Islam

    Proc. 22nd IAHR-APD Congress   2020.9

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  • Estimation of distributed flow resistance in vegetated rivers using airborne topo-bathymetric LiDAR and its application to risk management tasks for Asahi River flooding Reviewed

    Keisuke Yoshida, Shiro Maeno, Shuhei Ogawa, Koji Mano and Shinya Nigo

    Journal of Flood Risk Management   13 ( 1 )   e12584   2020.3

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1111/JFR3.12584

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  • 植生高分布と限界掃流力を考慮した植生流出を伴う洪水流解析モデルの検討 Reviewed

    吉田圭介,前野詩朗,永田貴美久,児子真也,赤穗良輔

    土木学会論文集B1(水工学)   75 ( 4 )   I_325 - I_330   2019.12

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  • 環境DNA 分析と物理環境調査による旭川下流部におけるアユの産卵可能性の検討 Reviewed

    吉田圭介,乾隆帝,宇田川涼平,前野詩朗,赤松良久,児子真也,?橋幸生,永田貴美久

    土木学会論文集B1(水工学)   75 ( 4 )   I_529 - I_534   2019.12

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  • 2018 年7 月西日本豪雨時の岡山県での降雨特性と旭川水系での洪水被害の調査解析 Reviewed

    吉田圭介,前野詩朗,工藤亮治,近森秀高,赤穗良輔,小川修平,永田貴美久

    土木学会論文集B1(水工学)   75 ( 1 )   172 - 183   2019.12

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.2208/jscejhe.75.1_172

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  • FLOOD DISASTER CHARACTERISTICS IN MABI DISTRICT OF KURASHIKI CITY DUE TO HEAVY RAIN IN 2018 AND INVESTIGATION OF FLOODING SCENARIO USING RIVER FLOOD FLOW COMBINED INUNDATION FLOW MODEL Reviewed

    MAENO Shiro, AKOH Ryosuke, NIHEI Yasuo, AKAMATSU Yoshihisa, YOSHIDA Keisuke

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 1 )   387 - 402   2019.12

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

    <p> Due to the heavy rain of July in 2018, several levees of the Oda River flowing through the Mabi district of Kurashiki City and its tributaries, the Suemasa River, the Takama River, and the Madani River, were breached. Inundation area reached 1,200 ha in Mabi district and maximum inundation depth was more than 5 m, and eventually 51 people died there. First, in this study, the inundation state was clarified by the field survey. And flooding scenario was examined using an integrated flooding simulation model that analyzes the flood flow of rivers and the inundation flow from the breaching points. At first, the analysis was performed without breaching condition of levee to estimate the time to start overflowing the levee. Then simulations under breaching condition was carried out to clarify the inundation process. Numerical results of inundation depth show in good agreement with the field surveyed results.</p>

    DOI： 10.2208/jscejhe.75.1_387

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  • 太田川中野観測所におけるSTIV流量観測とALBデータを用いた水理解析による精度検証 Reviewed

    児子真也,吉田圭介,前野詩朗,間野耕司,中野光隆

    土木学会論文集B1(水工学)   75 ( 4 )   I_613 - I_618   2019.12

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  • 数値浮子モデルとDIEX法をカップリングさせた洪水流量推定法の構築と現地適用 Reviewed

    赤穗良輔,前野詩朗,中山彰人,吉田圭介

    土木学会論文集B1(水工学)   75 ( 4 )   I_625 - I_630   2019.12

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  • Evaluation of discharge equation of lateral overflow located in the curved part of river, Reviewed

    M. Ishihara, R. Akoh, S. Maeno and K. Yoshida

    Proc. of 38th IAHR World Congress   2019.9

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  • ALBによる河道地形の再現性向上に伴う 河床変動解析の改善効果の検討 Reviewed

    山口華穂,吉田圭介,前野詩朗,間野耕司,赤穗良輔,西山哲

    土木学会論文集A2（応用力学）   74 ( 2 )   I_465 - I_474   2019.2

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  • 水路湾曲部に設置される横越流堤の流量公式の検討 Reviewed

    石原正義,赤穂良輔,前野詩朗,吉田圭介

    土木学会論文集B1(水工学)   74 ( 5 )   I_841 - I_846   2018.12

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  • ALB計測データを用いた流況解析に基づく旭川下流部におけるアユの産卵場の物理環境評価 Reviewed

    吉田圭介,前野詩朗,高橋幸生,児子真也,小川修平,赤穗良輔

    土木学会論文集B1(水工学)   74 ( 5 )   I_421 - I_426   2018.12

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  • Estimation of hydrodynamic forces acting on concrete blocks of toe protection works for coastal dikes by tsunami overflows Reviewed

    Keisuke Yoshida, Shiro Maeno, Tomihiro Iiboshi, Daisuke Araki

    Applied Ocean Research   80   181 - 196   2018.11

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    The extraordinary tsunami generated by the Great East Japan Earthquake in 2011 destroyed coastal protection facilities in the Tohoku region. After the catastrophe, landward toe protection works comprising concrete blocks were proposed at damaged coastal areas. However, the hydrodynamic behavior of the protection works against tsunami overflows has not been fully elucidated by earlier experimental studies. Therefore, this study investigated validity of three-dimensional (3-D) numerical simulations of tsunami flows over a simulated coastal dike with protection works of concrete block models. This study also presented a method of estimating the hydrodynamic forces acting on block models under the tsunami overflows. After conducting basic validation of the present numerical method, we compared experimentally obtained results of hydrodynamic forces to results obtained from simulations. Results show that the simulation data are qualitatively consistent with experimental data for the considered cases of overflow depths of four kinds. They also presented that the characteristics of hydrodynamic forces depend mainly on both the distance from the dike foundation and tsunami overflow depth. The salient finding is that the hydrodynamic forces are affected to a considerable degree by the irregularity of the block model arrangement or surface asperity of the protection works. The impulsive force of tsunami overflows at actual coasts will perturb concrete blocks placed in orderly rows at the original installation. Therefore, the landward toe protection works using concrete blocks necessitate supportive constructions to enhance their structural stability.

    DOI： 10.1016/j.apor.2018.09.001

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  • Estimating flow resistance by vegetation in rivers using high-resolution airborne laser bathymetry Reviewed

    K. Yoshida, S. Maeno, K. Mano, S. Ogawa, and R. Akoh

    12th Int. Symp. on Ecohydraulics   2018.8

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  • Remote sensing of morphodynamics and habitats in rivers using airborne LiDAR bathymetry Reviewed

    K. Yoshida, S. Maeno, S. Nigo, K. Mamno, S. Takahashi, and R. Akoh

    12th Int. Symp. on Ecohydraulics   2018.8

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  • 河床高データの解像度と計算格子サイズが河床変動解析に及ぼす影響に関する検討 Reviewed

    中山彰人,赤穗良輔,前野詩朗,吉田圭介

    河川技術論文集   24   107 - 112   2018.6

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  • ALB点群を用いた樹木群の密生度算定法の検討 Reviewed

    吉田圭介,前野詩朗,小川修平,井関禎之,赤穗良輔

    土木学会論文集B1(水工学)   74 ( 4 )   I_547 - I_552   2018.3

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  • 微地形を考慮した氾濫解析手法の検討と鬼怒川洪水氾濫域を対象とした数値実験 Reviewed

    赤穗良輔,前野詩朗,高橋巧武,吉田圭介,石川忠晴

    土木学会論文集B1(水工学)   74 ( 4 )   I_1441 - I_1446   2018.3

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  • 都市氾濫解析に用いる建物群の空隙率の設定方法に関する実験的検討 Reviewed

    赤穗良輔,前野詩朗,小川俊,吉田圭介

    土木学会論文集B1(水工学)   74 ( 4 )   I_1525 - I_1530   2018.3

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  • 用水路網が南海トラフ地震下の津波氾濫に与える影響の検討 Reviewed

    工代健太,前野詩朗,赤穗良輔,吉田圭介

    土木学会論文集B1(水工学)   74 ( 4 )   I_439 - I_444   2018.3

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  • 航空レーザ測深を用いた河道の植生種分布の判定手法の検討 Reviewed

    吉田圭介,前野詩朗, 間野耕司, 岩城智大, 小川修平, 赤穗良

    土木学会論文集A2（応用力学）   73 ( 2 )   I_607 - I_618   2018.2

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  • 背面盛土内にジオテキスタイルを併設した粘り強い海岸堤防構造の検討 Reviewed

    飯干富広,前野詩朗,田井祐介,吉田圭介,赤穂良輔

    土木学会論文集B2（海岸工学）   73 ( 2 )   1075 - 1080   2017.11

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  • Application of high-resolution ALB data of shallow water to river flow analysis Reviewed

    K. Yoshida, S. Maeno, K. Mano, K. Yamaguchi, and R. Akoh

    Proc. 3rd Int. Symp. on Shallow Flows   2017.6

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  • Improvement of float measurement method for river discharge using quasi-3D flood analysis Reviewed

    R. Akoh, S. Maeno, and K. Yoshida

    Proc. 3rd Int. Symp. on Shallow Flows   2017.6

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  • 適正な分流量を維持するための百間川分流部の固定堰周辺における植生管理方策の検討 Reviewed

    平井康隆,前野詩朗,吉田圭介,岩城智大,小川修平,赤穗良輔

    土木学会論文集B1(水工学)   73 ( 4 )   I_1081 - I_1086   2017.3

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  • 準三次元洪水流解析モデルを用いた浮子観測流量の高精度化手法の構築 Reviewed

    赤穗良輔,前野詩朗,吉田圭介

    土木学会論文集B1(水工学)   73 ( 4 )   I_517 - I_522   2017.3

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  • ALBを用いた河道地形計測の精度検証と流況解析の改善効果の検討 Reviewed

    吉田圭介,前野詩朗,間野耕司,山口華穂,赤穗良輔

    土木学会論文集B1(水工学)   73 ( 4 )   I_565 - I_570   2017.3

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  • フーリエ解析を用いた岡山市沿岸における津波ピークのリアルタイム予測法の検討 Reviewed

    工代健太,前野詩朗,赤穗良輔,吉田圭介

    土木学会論文集B1(水工学)   73 ( 4 )   I_1027 - I_1032   2017.3

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  • 津波越流時における海岸堤防のブロックを用いた裏法尻保護工に作用する流体力の数値計算 Reviewed

    吉田圭介,前野詩朗,竹内章人,赤穗良輔,飯干富広,荒木大輔

    土木学会論文集A2（応用力学）   72 ( 2 )   I_485 - I_494   2017.2

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  • 市街地レイアウトを考慮した岡山市における津波到達前後の浸水範囲予測および避難時間の検討 Reviewed

    赤穗良輔,前野詩朗,高橋巧武,工代健太,吉田圭介

    土木学会論文集B2（海岸工学）   72 ( 2 )   289 - 294   2016.11

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  • 津波越流による海岸堤防裏法尻保護工の衝撃時の被災特性に関する実験的研究 Reviewed

    前野詩朗,吉田圭介,荒木大輔,田井祐介,飯干富広,赤穗良輔

    土木学会論文集B2（海岸工学）   72 ( 2 )   1135 - 1140   2016.11

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  • Forestation control works: secular change at the Gion area in the Asahi River Reviewed

    K. Yoshida, S. Maeno, K. Yamaguchi, T. Iwaki, S. Fujita, Y. Hirai

    Proc. 20th IAHR-APD Congress   2016.8

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  • Dam break experiment to characterize landward bed scouring for coastal dikes Reviewed

    T. Iiboshi, S. Maeno, K. Yoshida, Y. Tai, A. Takeuchi, R. Akoh

    Proc. 20th IAHR-APD Congress   2016.8

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  • Sequential data assimilation for estimating bed roughness of vegetated flooded rivers Reviewed

    K. Yoshida, S. Maeno

    Proc. 20th IAHR-APD Congress   2016.8

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  • Study of tidal effect on tsunami behavior striking offshore of Okayama city Reviewed

    K. Kudai, S. Maeno, K. Yoshida, R. Akoh

    Proc. 20th IAHR-APD Congress   2016.8

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  • Improvement of diversion weir and surrounding vegetation condition effects on diversion discharge in the Asahi River Reviewed

    K. Yoshida, S. Maeno, R. Akoh, K. Yamaguchi, T. Iwaki, S. Fujita, Y. Hirai

    Proc. 20th IAHR-APD Congress   2016.8

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  • 旭川祇園地区における経年変化を考慮した礫河原再生効果の検討 Reviewed

    前野詩朗,吉田圭介,平井康隆,岩城智大,山口華穂,藤田駿佑

    土木学会論文集B1(水工学)   72 ( 4 )   I_1069 - I_1074   2016.3

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  • 洪水時の河道内植生による流水抵抗の逆推定手法の検討 Reviewed

    吉田圭介,前野詩朗

    土木学会論文集B1(水工学)   72 ( 4 )   I_1063 - I_1068   2016.3

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  • 植生消長モデルを用いた礫河原再生後の物理環境変化の検証 Reviewed

    平井康隆,前野詩朗,吉田圭介,藤田駿佑,赤穗良輔

    土木学会論文集B1(水工学)   72 ( 4 )   I_1063 - I_1068   2016.3

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  • 南海トラフ地震下の鳴門・明石海峡部の津波波形を用いた岡山市に襲来する津波の予測モデルの検討析 Reviewed

    工代健太,前野詩朗,赤穗良輔,吉田圭介

    土木学会論文集B1(水工学)   72 ( 4 )   I_397 - I_384   2016.3

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  • Flood hydrograph estimation using an adjoint shallow-water model Invited Reviewed

    Keisuke Y., Tadaharu I.

    Journal of Hydro-environmental Research   9 ( 3 )   429 - 440   2015.9

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    DOI： 10.1016/j.jher.2014.12.003

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  • Numerical prediction of hydrodynamic force acting on a natural stone in open-channel flows Reviewed

    K.Yoshida, S. Ushijima, R. Tanaka, N. Miyagi, S. Maeno

    Proc. 36th IAHR World Congress   2015.7

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  • アイスハーバー型魚道の流れの解析と低流量・河床低下時の機能改善 Reviewed

    前野詩朗,吉田圭介,田中龍二

    土木学会論文集B1(水工学)   71 ( 4 )   I_1081 - I_1086   2015.3

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  • GPUによる分流を含む洪水流計算の高速化 Reviewed

    吉田圭介,田中龍二,前野詩朗

    土木学会論文集B1(水工学)   71 ( 4 )   I_589 - I_594   2015.3

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  • 旭川における植生分布の経年変化を考慮した洪水流の数値解析 Reviewed

    吉田圭介,前野詩朗,藤田駿佑,松山悟,岩城智大,平井康隆

    土木学会論文集B1(水工学)   71 ( 4 )   I_1039 - I_1044   2015.3

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  • GPUによる河川の浅水流計算の高速化 Reviewed

    吉田圭介,田中龍二,前野詩朗

    土木学会論文集A1（応用力学）   70 ( 2 )   I_761 - I_768   2015.2

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  • 開水路に置かれた自然石に作用する流体力の数値計算 Reviewed

    吉田圭介,牛島省,田中龍二,宮木伸,前野詩朗

    土木学会論文集A1（応用力学）   70 ( 2 )   I_701 - I_708   2015.2

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  • Effects of landward slope protection and toe protection work shape at coastal dikes on landward bed scouring caused by tsunami overflow Reviewed

    Tomihiro Iiboshi, Shiro Maeno, Keisuke Yoshida, Daisuke Takata, Akira Yamamura

    Proc. of the 36th IAHR World Congress   4103 - 4111   2015

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    Coastal dikes in Iwate, Miyagi, and Fukushima prefectures in Japan were damaged severely by tsunami overflow consequent to the 2011 off-the-Pacific coast of Tohoku Earthquake. A main factor of the failure was landward bed scouring following the tsunami overflow. Coastal dikes were destroyed completely or partially because of embankment material outflows caused by scouring of the landward bed. Because of this severe damage, the tsunami committee in Japan recommended several methods to produce resilient structures for coastal dikes. One method is landward toe protection works to reduce the landward toe bed scouring. It can improve the coastal dike stability. However, the relation of protection work shapes to landward bed scouring characteristics remains unclear. Therefore, we particularly examined the effects of landward slope and toe protection work shapes on landward bed scouring. We conducted small-scale experiments to clarify the effects of works with different characteristics. The obtained results demonstrate that a large scouring hole was formed around the landward toe area in any shape of the slope protection works without bed protection works. Landward bed protection works can reduce size of the scouring hole. A surface protuberances of landward toe protection works is more effective to reduce the scouring depths and areas.

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  • 津波越流による海岸堤防裏法尻の洗掘に及ぼす裏法被覆工と法尻保護工形状の影響 Reviewed

    飯干富広,前野詩朗,吉田圭介,高田大資

    土木学会論文集B2（海岸工学）   70 ( 2 )   I_966 - I_970   2014.11

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  • Inverse estimation of distributed roughness coefficients in vegetated flooded rivers Reviewed

    Keisuke Yoshida, Shiro Maeno

    Journal of Hydraulic Research   52 ( 6 )   811 - 823   2014.9

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    DOI： 10.1080/00221686.2014.932854

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  • Study on characteristics of hydrodynamic force on slope and landward toe protection works of coastal dikes due to tsunami overflow Reviewed

    T. Iiboshi, S. Maeno, K. Yoshida, D. Takata

    19th IAHR-APD Congress   2014.9

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  • Development and application of vegetation dynamics model for effective river management tasks in the Asahi River Reviewed

    K. Yoshida, S. Maeno, S. Matsuyama, S. Fujita

    River Flow 2014   571 - 579   2014.9

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  • Evaluation of hydrodynamic forces acting on bridge under flood in steep medium and small scale rivers Reviewed

    S. Maeno, K. Yoshida, R. Tanaka

    19th IAHR-APD Congress   2014.9

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  • Numerical simulation of tsunami inundation in Okayama city, Japan Reviewed

    K. Kudai, K. Yoshida, S. Maeno

    19th IAHR-APD Congress   2014.9

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  • Prediction of forestaion process in the Asahi river, Japan using a vegetation dynamics model Reviewed

    K. Yoshida, S. Maeno, S. Fujita, S. Matsuyama

    19th IAHR-APD Congress   2014.9

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  • STUDY ON CHARACTERISTICS OF PRESSURE AND HYDRODYNAMIC FORCES ON COASTAL DIKE DUE TO TUNAMI OVERFLOW Reviewed

    IIBOSHI Tomihiro, MAENO Shiro, YOSHIDA Keisuke, TAKATA Daisuke

    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)   70 ( 2 )   I_498 - I_503   2014.8

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    &nbsp;Coastal dikes in Iwate, Miyagi, and Fukushima prefectures were seriously damaged due to the tsunami overflow by the 2011 off the Pacific coast of Tohoku Earthquake. However, hydrodynamic forces acting on the landward toe protection works were not clarified at present state. Therefore, hydrodynamic pressure of the dike slope and hydrodynamic force of the landward toe protection works due to tsunami overflow were experimentally investigated using different types of coastal blocks. The obtained results show that uplift force of the landward toe armoring block does not proportionally increase with the increase of tsunami height. Although surface protuberances of blocks of landward toe bed protection works increase the hydrodynamic force, they have the effect to reduce the velocity related to scouring. On the other hand, stepwise armoring blocks have the effect to decrease hydrodynamic force and reduce the velocity over the landward toe protection blocks.

    DOI： 10.2208/jscejoe.70.I_498

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  • 南海トラフ巨大地震を想定した岡山市の津波遡上解析 Reviewed

    工代健太,吉田圭介,前野詩朗

    土木学会論文集B3（海洋開発）   70 ( 2 )   I_289 - I_294   2014.8

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  • 旭川大原試験区における植生消長シミュレーションモデルの構築と検証 Reviewed

    前野詩朗,吉田圭介,松山悟,藤田駿佑

    土木学会論文集B1(水工学)   70 ( 4 )   I_1369 - I_1374   2014.3

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  • 洪水時の急勾配中小河川の橋梁に作用する流体力の評価 Reviewed

    前野詩朗,吉田圭介,田中龍二

    土木学会論文集B1(水工学)   70 ( 4 )   I_883 - I_888   2014.3

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  • Effects of groin installation on gravel bed restoration in the Tedori River Reviewed

    S. Maeno, K. Yoshida, K. Kaseguma and A. Yamamura

    12th Int. Symp. on River Sedimentation   2013.9

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  • Inverse estimation of flow resistance due to vegetation in the Asahi River during a flood Reviewed

    K. Yoshida and S. Maeno

    Proc. 35th IAHR Congress   2013.9

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  • Three-Dimensional Flow Analysis around Permeable Hydraulic Structure Comprising Connected Stones Reviewed

    S. Maeno, K. Yoshida, K. Kaseguma and A. Yamamura

    Proc. 35th IAHR Congress   2013.9

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  • Effect of flood impact on wash-out of vegetation and bed deformation in the Asahi River Reviewed

    K. Yoshida, S. Maeno, S. Matsuyama and N. Mishima

    12th Int. Symp. on River Sedimentation   2013.9

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  • 射流場の護岸・根固めブロックに作用する流体力評価 Reviewed

    忰熊公子,前野詩朗,吉田圭介,高田大資,山村明

    土木学会論文集B1(水工学)   69 ( 4 )   I_691 - I_696   2013.3

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  • 2011年9月旭川洪水における河道内植生の流水抵抗特性の検討 Reviewed

    吉田圭介,前野詩朗

    土木学会論文集B1(水工学)   69 ( 4 )   I_715 - I_720   2013.3

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  • 手取川の洪水時の礫河原再生工の変形要因の検討 Reviewed

    前野詩朗,忰熊公子,吉田圭介,山村 明

    土木学会論文集B1(水工学)   69 ( 4 )   I_721 - I_726   2013.3

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  • 旭川の大原箇所における植生生長と洪水時の植生流出条件の検討 Reviewed

    前野詩朗,吉田圭介,三島望,松山悟

    土木学会論文集B1(水工学)   69 ( 4 )   I_727 - I_732   2013.3

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  • Estimation of river discharge hydrograph by using adjoint shallow-water model Reviewed

    Keisuke Y. and Tadaharu I.

    Proc. 18th IAHR-APD   2012.8

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  • Unsteady tidal effects on flood flow in the estuarine channel of Yangtze river Reviewed

    Z. Wang, T. Ishikawa and K. Yoshida

    Proc. 3rd Int. Symp. on Shallow Flows   2012.6

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  • Flood flow analysis using a quasi-three-dimensional flow model and aerial photos Reviewed

    Keisuke Y., Tadaharu I. and Yasuhisa M.

    Proc. 3rd Int. Symp. on Shallow Flows,   2012.6

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  • Adjoint法による流量ハイドログラフ推定法に関する研究 Reviewed

    吉田圭介, 石川忠晴

    水工学論文集   56 ( 4 )   I_1261 - I_1266   2012.3

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  • 揚子江下流河道の洪水流に対する潮汐の非定常効果 Reviewed

    王張嶠, 石川忠晴, 吉田圭介

    土木学会論文集B1（水工学）   68 ( 1 )   67 - 76   2012

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  • 準3次元モデルによる利根川下流部1998年9月洪水流の再現 Reviewed

    石川忠晴, 吉田圭介, 箕浦靖久

    土木学会論文集B1（水工学）   67 ( 3 )   155 - 167   2011.11

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  • 浅水流adjointモデルによる河床粗度の時間変化の逆推定法に関する基礎的検討 Reviewed

    吉田圭介

    応用力学論文集   14 ( 2 )   I_533 - I_540   2011.9

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  • Inverse estimation of bed roughness coefficients of open-channel by using shallow-water adjoint model Reviewed

    Yoshida, K. and Ishikawa, T.

    Proc. 34th IAHR Congress   4392 - 4399   2011.6

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  • 浅水流adjointモデルによる複断面河道の河床粗度の逆推定法に関する基礎的検討 Reviewed

    吉田圭介

    水工学論文集   55   S_1009 - S_1014   2011.3

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  • Inverse estimation of bed roughness coefficients of open-channel by using adjoint model in shallow-water flows Reviewed

    YOSHIDA Keisuke

    Journal of Hydroscience and Hydraulic Engineering   29 ( 1 )   1 - 13   2011

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  • Quasi-3D flow solver by CIP-Soroban scheme and its application to flood flow in Tone River Reviewed

    Yoshida, K. and Ishikawa, T.

    Proc. 17th APD-IAHR Congress   3a043   2010.2

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  • 変分法と浅水流モデルを併用した河床粗度の逆推定法に関する研究 Reviewed

    吉田圭介, 石川忠晴

    水工学論文集   54   991 - 996   2010

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  • Derivation of upstream boundary condition for 3-D numerical simulation of sediment dispersion around the Yangtze River mouth, China Reviewed

    Wang, Z., Yoshida, K and Ishikawa, T.

    Proc. 3rd Int. Conf. on Estuaries & Coasts   754 - 761   2009.9

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  • 準3次元CIP-Sorobanモデルによる利根川洪水流の大規模数値計算 Reviewed

    吉田圭介, 石川忠晴, 箕浦靖久

    水工学論文集   53   877 - 882   2009

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  • 実体視と画像相関解析を併用した洪水航空写真解析手法の構築と検証 Reviewed

    箕浦靖久, 石川忠晴, 吉田圭介

    水工学論文集   53   997 - 1002   2009

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  • Quasi-3D solver of meandering river flows by CIP-Soroban scheme in cylindrical coordinates with support of boundary fitted coordinate method Reviewed

    Yoshida, K. and Ishikawa, T.

    Proc. 16th APD-IAHR Congress   2008.9

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  • Flood flow analysis on aerial photos by image correlation method with support of stereo visualization Reviewed

    Minoura, Y., Ishikawa, T. and Yoshida, K.

    Proc. 16th APD-IAHR Congress   999 - 1004   2008.9

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  • Flow solver of arbitrarily meandering river by CIP-Soroban-BFC scheme with quasi-3D method Reviewed

    Yoshida, K. and Ishikawa, T.

    Proc. 8th International Conference on HydroScience and Engineering   2008.9

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  • Derivation of boundary condition for quasi-3D model of water exchange between Neijiang and Yangtze river Reviewed

    Zhao, L., Yoshida, K., Ishikawa, T. and Futagi, K.

    Proc. 16th APD-IAHR Congress   491 - 496   2008.9

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  • Study on turbidity increase during flood in Myoginohana area of lake Kasumigaura Reviewed

    Yoshida, K., Ishikawa, T., Kobayashi, Y., Sasaki, F., Aoyama, S. and Ichiyama, M.

    Proc. 16th APD-IAHR Congress   472 - 477   2008.9

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  • Depth-averaged numerical solver of meandering river flows by CIP-Soroban grids in cylindrical coordinate system Reviewed

    Yoshida,K, Ishikawa, T

    Journal of Hydroscience and Hydraulic Engineering, JSCE   26 ( 1 )   11 - 28   2008

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  • 鎮江市内江の流動計算のための長江水理条件の導出 Reviewed

    趙聯芳, 吉田圭介, 石川忠晴, 二木敬右

    水工学論文集   52   1051 - 1056   2008

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    DOI： 10.2208/prohe.52.1051

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  • 円筒座標CIP-Soroban法と境界適合座標法を組み合わせた蛇行河川の準3次元計算法 Reviewed

    吉田圭介, 石川忠晴

    水工学論文集   52   997 - 1002   2008

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    DOI： 10.2208/prohe.52.997

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  • Numerical prediction of meandering river flows by CIP-Soroban grids in cylindrical coordinate system Reviewed

    Yoshida, K. and Ishikawa, T.

    Proc. 32nd IAHR Congress   2007.7

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  • 霞ヶ浦の妙技の鼻水域における出水時濁度上昇に関する研究 Reviewed

    吉田圭介, 石川忠晴, 佐々木史, 青山貞雄, 市山誠

    河川技術論文集   Vol.13   13 - 18   2007

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  • EFFICIENT ANALYSIS OF RIVER FLOW FIELD ON AERIAL PHOTOGRAGHS BY CORRELATION METHOD WITH SUPPORTE OF STEREO VISUALIZATION Reviewed

    MINOURA Yasuhisa, ISHIKAWA Tadaharu, YOSHIDA Keisuke

    Doboku Gakkai Ronbunshuu B   Vol.51   1093 - 1098   2007

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    Stereo images obtained from sequential aerial photographs of river freshets contain a lot of useful information for river hydraulics as well as river engineering works. The image correlation analysis is a standard technique for analyzing the images, but it sometimes produces anomalous results for the area where color fluctuation of the water surface is small. On the other hand, a classical manual analysis through stereo eyeglasses usually works well even in such unclear parts of the images, but the manual analysis costs much labor and time. <BR>In this study, a new technique to analyze stereo images of river flows is developed by combining the above mentioned two methods: A small amount of suggestions are made by using the results from the manual analysis for the image correlation analysis on a computer, and then the results of the second trial of the latter is much improved without any significant time consumption.

    DOI： 10.2208/prohe.51.1093

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  • NUMERICAL SOLVER FOR SHALLOW-WATER MODEL OF MEANDERING RIVER FLOWS BY CIP-SOROBAN SCHEME IN CYLINDRICAL COODINATE SYSTEM Reviewed

    YOSHIDA Keisuke, ISHIKAWA Tadaharu

    Doboku Gakkai Ronbunshuu B   Vol.51   805 - 810   2007

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    A new numerical solver is developed for a shallow-water flow model to simulate meandering river flows. This solver can investigate the flows in the curved river channel, by means of the adaptive CIP-Soroban (CIP-S) scheme in a cylindrical coordinate system. Time development of water velocity and free-surface level is computed by the orthogonal curvilinear coordinate system without any transformation of the governing equations, and the advection term is calculated by the high-accuracy CIP scheme. The numerical grid points of the waterfront line at the river bank are moved and tracked by the kinematic condition so that the grid points are always located on the line, and the rearrangement of the positions of the girds is easily conducted by the original CIP-S method. From the verification of this solver by the pure advection problem and by the numerical solution of the meandering river flows, in comparison with the CIP-S method in a Cartesian coordinate system and with the boundary fitted coordinate (BFC) method, it is shown that the proposed numerical solver reasonably predicts the main flow profile and water surface elevation and will be a promising numerical method as one of the practical solutions.

    DOI： 10.2208/prohe.51.805

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  • Fundamental investigation of depth-averaged numerical model with evolution of secondary currents in curved channels Reviewed

    Yoshida, K. and Ishikawa, T.

    Proc. 15th APD-IAHR Congress   2006.8

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  • 2次流の時空間発展を考慮した水深積分モデルに関する基礎的検討 Reviewed

    吉田圭介, 石川忠晴

    水工学論文集, 第50巻   pp.781-786   781 - 786   2006

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    DOI： 10.2208/prohe.50.781

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  • Direct numerical simulation of two-fluid system and its application to air-water turbulent flows with deformed interfaces Reviewed

    Yoshida, K., Ushijima, S. and Nezu, I.

    Proc. 31st IAHR Congress   836 - 846   2005.9

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  • 風シアーと底面シアーが共存する開水路混成流における組織乱流構造と気液界面気体輸送過程に関する研究 Reviewed

    吉田圭介,禰津家久

    土木学会論文集   803/II-73   57 - 67   2005.5

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  • 逆流風波開水路混成場における乱れ構造と気体輸送に関する実験的研究 Reviewed

    禰津家久, 福谷彰, 吉田圭介, 垂井晃一

    応用力学論文集   8   911 - 918   2005

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    DOI： 10.2208/journalam.8.911

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  • TURBULENCE CHARACTERISTICS IN ADVERSE WIND-DRIVEN OPEN-CHANNEL FLOWS Reviewed

    NEZU Iehisa, TARUI Kouichi, YOSHIDA Keisuke

    Doboku Gakkai Ronbunshuu B   49   505 - 510   2005

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    This study describes an experimental investigation on turbulence characteristics and the water-surface fluctuations in adverse wind-driven open-channel flows by using both a laser Doppler Anemometer (LDA) and a wave gauge simultaneously. In this study, it was shown that the velocity fluctuations of water flow near the interface in not only cocurrent flow but also adverse flow are significantly affected by the water surface in every range of frequency. However turbulence characteristics in water layer in adverse wind-driven open-channel flows are different from those in cocurrent flow, and there exists a high correlation between turbulence and the surface fluctuations in predominant frequency due to high-sheared wind flow.

    DOI： 10.2208/prohe.49.505

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  • DIRECT NUMERICAL SIMULATION OF AIR-WATER TURBULENT FLOWS WITH DEFORMED INTERFACE Reviewed

    YOSHIDA Keisuke, USHIJIMA Satoru, NEZU Iehisa

    Doboku Gakkai Ronbunshuu B   49   709 - 714   2005

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    In this study, a direct numerical simulation for analyzing the immiscible incompressible two-fluid flows was carried out with the 3-dimensional MARS method, and the applicability of this scheme was verified in the water column collapse phenomenon, 2-dimesional channel flows between two walls and 3-dimensinal air-water co-current flows between a non-slip wall and a free-slip wall. It was shown that the present numerical simulation was in good agreement with previous experimental and numerical results, and that the volume of fluid in flows was sufficiently conserved for the long simulation time step. However, it is pointed out in the 3-D air-water co-current flows that lack of simulation grids and inadequate averaged time generates the inaccurate results in this DNS.

    DOI： 10.2208/prohe.49.709

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  • Experimental study on air-water interfacial turbulent hydrodynamics and gas transfer in wind-induced open-channel flows Reviewed

    Yoshida, K. and Nezu, I.

    Proc.4th International Symposium on Environmental Hydraulics   185 - 191   2004.12

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  • Numerical prediction of incompressible two-fluid system and its application to stratified flows with water and silicone-oil, Reviewed

    K. Yoshida, S. Ushijima and I. Nezu

    Proc. 14th APD-IHAR   309 - 309   2004.12

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  • 風シアーを伴う開水路乱流場における水層組織渦構造に関する研究 Reviewed

    吉田圭介, 禰津家久, 垂井晃一

    応用力学論文集   Vol.7   1051 - 1060   2004

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    DOI： 10.2208/journalam.7.1051

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  • 水面上に風シアーが存在する開水路流場における水層乱れ構造と水面変動に関する研究 Reviewed

    禰津家久, 吉田圭介, 垂井晃一

    水工学論文集   Vol.48   517 - 522   2004

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    DOI： 10.2208/prohe.48.517

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  • Fundamental study on air-water interfacial coherent structures in wind-induced water-waves flows by PIV measurements

    Nezu, I. and Yoshida, K.

    Proc. 30th IAHR Congress   C-1   235 - 242   2003.8

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  • Computation of immiscible two-fluid flows with a unified numerical procedure Reviewed

    Yoshida, K., Ushijima, S. and Nezu, I.

    Proc. 30th IAHR Congress   D   663 - 670   2003.8

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  • FUNDAMENTAL STUDY ON AIR-WATER INTERFACIAL COHERENT STRUCTURES IN WIND-INDUCED WATER WAVES FLOWS BY PIV MEASUREMENTS Reviewed

    NEZU Iehisa, YOSHIDA Keisuke, IKEDA Daisuke

    Doboku Gakkai Ronbunshuu B   Vol.47   457 - 462   2003

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    This paper describes an experimental study on turbulent bursting phenomena across air-water interface in wind-induced water waves by using Particle-Image Velocimetry (pry). The purpose of this study is to clarify coherent structures near the air-water interface in a wind-driven shear layer, and to evaluate an effect on momentum transport due to the busting events from the interfacial water to water-body flow. As the results of experiments, it is shown that the water flow is a combined flow with a wall shear flow and orbital motions, and that the wave-induced fluctuations have major power in the whole velocity fluctuations. In particular, when the bursting events are detected near the air-water interface by human eyes in the time-series of PIV raw images, only the low-frequency fluctuations are enhanced obviously at that time in wavelet-filter analysis. Therefore, it is inferred that the mechanism of water momentum transport is organized by the wave-induced fluctuations from the air-water interface to the water bulk, not by the bursting events with small fluctuations. It is also recognized by PIV measurements that the busting events are closely related to the unsteady wave-induced velocity fluctuations near the interface.

    DOI： 10.2208/prohe.47.457

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  • 風波発生下における自由水面近傍での組織構造に関する基礎的研究 Reviewed

    禰津家久, 吉田圭介, 池田大輔, 垂井晃一

    応用力学論文集   Vol.6   933 - 942   2003

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    DOI： 10.2208/journalam.6.933

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  • A FUNDAMENTAL STUDY ON AIR-WATER TURBULENT STRUCTURES IN WIND-INDUCED OPEN-CHANNEL FLOWS Reviewed

    NEZU Iehisa, YOSHIDA Keisuke, USHIJIMA Satoru

    733/II-63 ( 733 )   67 - 76   2003

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    DOI： 10.2208/jscej.2003.733_67

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  • FIFTH-ORDER CONSERVATIVE SCHEME WITH FLUX CONTROL APPLICABLE TO CONVECTION EQUATIONS Reviewed

    USHIJIMA Satoru, YOSHIDA Keisuke, TAKEMURA Masaki, NEZU Iehisa

    747/II-65 ( 747 )   85 - 94   2003

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    DOI： 10.2208/jscej.2003.747_85

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  • 非圧縮性混相流場に対する数値解法と水-シリコンオイル成層流への適用性に関する考察 Reviewed

    牛島省, 吉田圭介, 禰津家久

    応用力学論文集   6   891 - 898   2003

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    DOI： 10.2208/journalam.6.891

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  • Experimental Study on Mutual Turbulent Structures across Air-Water Interface in Wind-Induced Water Waves by Synchronous LDA Measurements Reviewed

    Nezu,I, Yoshida,K, Ikeda,D

    Journal of Hydroscience and Hydraulic Engineering, JSCE.   Vol.21 ( No.1 )   63 - 70   2003

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  • 自由水面流れの数値計算における内部流動の解析精度に関する考察 Reviewed

    牛島省, 禰津家久, 吉田圭介, 池田大輔

    水工学論文集   Vol.47   409 - 414   2003

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    DOI： 10.2208/prohe.46.409

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  • Numerical prediction of free surface flows with QSI scheme on collocated grid system Reviewed

    Ushijima, S., Yoshida, K., Takemura, M. and Nezu, I.

    Proc. 10th international symposium on flow visualization   F0162   2002.8

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  • Numerical prediction of free surface flows with QSI scheme on collocated grid system Reviewed

    S. Ushijima, I. Nezu and K. Yoshida

    Proc. 13th APD-IAHR Symp.   322 - 326   2002.8

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  • Turbulence visualization of multi-scale water velocity fluctuations of wind-driven water waves in air-water two-phase flows Reviewed

    I. Nezu, K. Yoshida and S. Ushijima

    Proc. 10th International symposium on flow visualization   F0088   2002.8

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  • Experimental study on interfacial turbulent structures in wind-induced water waves by synchronous LDA measurements Reviewed

    I. Nezu, S. Ushijima and K. Yoshida

    Proc. 13th APD-IAHR Symp.   38 - 43   2002.8

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  • 水・空気層の同時計測による風波界面近傍流体の相関構造に関する研究 Reviewed

    禰津家久, 吉田圭介

    水工学論文集   Vol.46   547 - 552   2002

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    DOI： 10.2208/prohe.46.547

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  • Study on turbulent structures of air-induced water waves by using phase-averaged PIV measurements Reviewed

    Nezu, I., Ushijima, S., Onitsuka, K. and Yoshida, K

    Proc. 3rd Int. Symp. on Measurement Techniques for Multiphase Flows   211 - 220   2001.8

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  • PIV measurements of turbulent structures across air-water interface in wind-driven water waves Reviewed

    Nezu, I., Ushijima, S., Onitsuka, K. and Yoshida, K.

    Pcoc. 6th Asian Symp. on Visualization   363 - 365   2001.5

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

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  • TURBULENT STRUCTURE AT THE AIR-WATER INTERFACE IN AIR-INDUCED WIND WATER WAVE ASSOCIATED WITH BREAKING WAVES Reviewed

    NEZU Iehisa, USHIJIMA Satoru, YOSHIDA Keisuke

    684/II-56 ( 684 )   69 - 80   2001

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

    DOI： 10.2208/jscej.2001.684_69

    CiNii Article

    CiNii Books

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  • PIV法を用いた砕波を伴う風波の界面乱流構造に関する研究 Reviewed

    禰津家久, 井上理恵, 吉田圭介

    応用力学論文集,Vol.3   3   775 - 786   2000

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

    DOI： 10.2208/journalam.3.775

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▼display all

MISC

Presentations

  • Deep learning riparian land cover classification methodology using aerial photograph

    Shijun PAN, Keisuke YOSHIDA, Junichi TANIGUCHI, and Akihide WATANABE

    39th IAHR World Congress  2022.6.20 

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    Event date： 2022.6.20

    Language：English   Presentation type：Oral presentation (general)  

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  • 環境DNA分析と水理特性調査による，旭川下流部でのアユの産卵可能性の検討

    宇田川涼平,髙橋幸生,吉田圭介,前野詩朗,赤穗良輔,乾隆帝,赤松良久,児子真也,笹田直樹,近藤正美

    第71回土木学会中国支部研究発表会 

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    Event date： 2019.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 河川における根固め工変状抑制のために設置する小口止め補助構造物の効果に関する研究

    永田貴美久,飯干富広,前野詩朗,吉田圭介,赤穂良輔

    第71回土木学会中国支部研究発表会 

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    Event date： 2019.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 砂州縁部における河岸浸食特性の実験的検討および数値解析の適用性に関する研究

    田中龍二,赤穂良輔,吉田圭介,前野詩朗

    第70回土木学会中国支部研究発表会 

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    Event date： 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ALBデータを用いた吉野川の洪水解析の改善効果に関する検討

    中山彰人,赤穗良輔,前野詩朗,吉田 圭介

    第70回土木学会中国支部研究発表会 

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    Event date： 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 氾濫形態及び斜面勾配の影響を考慮した避難経路策定モデルの提案と現地適用

    橋爪菜摘,前野詩朗,赤穗良輔,吉田圭介

    第70回土木学会中国支部研究発表会 

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    Event date： 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 平成26年広島豪雨災害を対象とした土石流を含む内水氾濫解析

    高橋巧武,赤穗良輔,前野詩朗,吉田圭介

    第70回土木学会中国支部研究発表会 

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    Event date： 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ALB計測データを用いた流況解析に基づくPHABSIMによるアユの産卵場の物理環境の評価

    髙橋幸生,吉田圭介,前野詩朗,赤穂良輔

    第70回土木学会中国支部研究発表会 

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    Event date： 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ALB による河道地形の再現性向上に伴う河床変動解析の改善効果の検討

    山口華穂,吉田圭介,前野詩朗,間野耕司,赤穗良輔,西山哲

    第21回応用力学シンポジウム 

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    Event date： 2018.5

    Language：Japanese   Presentation type：Poster presentation  

    Venue：名城大学  

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  • 旭川分流部周辺におけるALBの計測精度検証と植生分布判定手法の検討

    岩城智大,吉田圭介,赤穗良輔,間野耕司,前野詩朗,山口華穂,小川修平

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 航空レーザ測深を用いた河道の植生種分布判定手法の検討

    吉田圭介,前野詩朗,間野耕司,岩城智大,小川修平,赤穗良輔

    第20回応用力学シンポジウム 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：京都大学  

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  • 高梁川・小田川合流部周辺における平成18年7月洪水の数値シミュレーション

    平下慎也,赤穗良輔,前野詩朗,吉田圭介

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 旭川のケレップ水制域における季節的な塩水挙動の検討

    稲見俊輝,赤穗良輔,前野詩朗,吉田圭介

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ALBによる高解像度の地形・植生データを用いた旭川洪水流解析の精度改善

    小川修平,吉田圭介,前野詩朗,岩城智大,赤穗良輔,間野耕司

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 南海トラフ地震下の潮汐を考慮した岡山市沿岸における津波ピークのリアルタイム予測法

    工代健太,前野詩朗,赤穗良輔,吉田圭介

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 建物群を用いた市街地氾濫解析の透過係数に関する実験的検討

    下間智博,赤穗良輔,前野詩朗,吉田圭介,小川俊

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 逐次重点サンプリング法による洪水時の河道内植生による流水抵抗の逆推定

    吉田圭介,前野詩朗

    第69回土木学会中国支部研究発表会 

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    Event date： 2017.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 市街地レイアウトを考慮した岡山市における津波到達前後の浸水範囲予測および避難時間の検討

    高橋巧武,赤穗良輔,前野詩朗,工代健太,吉田圭介

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 準三次元流況解析を用いた江の川における観測流量の検証

    中田博貴,赤穗良輔,前野詩朗,吉田圭介

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 鉛直 2 次元解析モデルを用いた津波越流時の堤防裏法尻における局所洗掘に関する研究

    田中龍二,前野詩朗,吉田圭介,赤穗良輔

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 津波越流による海岸堤防裏法尻保護工の被災特性に関する実験的研究

    荒木大輔,前野詩朗,吉田圭介,田井祐介,赤穂 良輔

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 急斜面上の市街地を対象とした氾濫解析モデルの適用性の模型実験による検証

    小川俊,赤穂良輔,前野詩朗,吉田圭介

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 旭川祇園地区における切り下げ・埋戻しによる経年変化を考慮した樹林化抑制効果の検討

    山口華穂,吉田圭介,前野詩朗,赤穂良輔,岩城智大

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 津波越流時における海岸堤防の裏法尻保護工に作用する流体力の数値計算

    吉田圭介,前野詩朗,竹内章人,赤穗良輔,飯干富広,荒木大輔

    第19回応用力学シンポジウム 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道大学  

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  • 湾曲水路における横越流量算定公式に関する実験的研究

    荻田泰弘,石原正義,前野詩朗,吉田圭介,赤穂良輔

    第68回土木学会中国支部研究発表会 

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    Event date： 2016.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 南海トラフ巨大地震を想定した倉敷市臨海部周辺における津波遡上解析

    工代健太,竹田直弥,前野詩朗,吉田 圭介

    第67回土木学会中国支部研究発表会 

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    Event date： 2015.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 2D-3Dハイブリッドモデルによる温井ダム湖と上下流河川の流況解析

    伊藤佑果,田中龍二,前野詩朗,吉田 圭介

    第67回土木学会中国支部研究発表会 

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    Event date： 2015.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 高梁川と小田川合流点付替えによる洪水時の流況変化の検討

    平下慎也,吉田圭介,前野詩朗

    第67回土木学会中国支部研究発表会 

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    Event date： 2015.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 津波越流時に海岸堤防保護工に作用する流体力特性と圧力特性に関する研究

    田井祐介,飯干富広,吉田圭介,前野詩朗

    第67回土木学会中国支部研究発表会 

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    Event date： 2015.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 旭川分流堰の改修とその周辺の植生繁茂状況が分流量に与える影響の検討

    岩城智大,藤田駿佑,吉田圭介,前野詩朗

    第67回土木学会中国支部研究発表会 

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    Event date： 2015.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 開水路に置かれた自然石に作用する流体力の数値計算

    吉田圭介,牛島省,田中龍二,宮木伸,前野詩朗

    第17回応用力学シンポジウム講演会 

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    Event date： 2014.5.10

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • GPU による河川の浅水流計算の高速化

    吉田圭介,田中龍二,前野詩朗

    第17回応用力学シンポジウム講演会 

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    Event date： 2014.5.10

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 津波越流時に海岸堤防裏法尻保護工に作用する流体力特性に関する研究

    高田大資,飯干富広,吉田圭介,前野詩朗

    第66回土木学会中国支部研究発表会 

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    Event date： 2014.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 組立式消波工の反射率に関する研究

    橋田和博,前野詩朗,吉田圭介,中西裕之,野村修治

    第66回土木学会中国支部研究発表会 

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    Event date： 2014.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • GPGPUを用いた浅水流方程式に基づく数値解析の高速化

    田中龍二,吉田圭介,前野詩朗

    第66回土木学会中国支部研究発表会 

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    Event date： 2014.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 旭川における植生動態モデルの検証と樹林化予測

    藤田駿佑,吉田圭介,前野詩朗

    第66回土木学会中国支部研究発表会 

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    Event date： 2014.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 2013年9月の出水を対象とした斐伊川及び放水路の流況解析

    原田健太郎,吉田圭介,前野詩朗,松本享之

    第66回土木学会中国支部研究発表会 

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    Event date： 2014.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 多相場モデルを用いた自然石に作用する流体力の並列数値計算

    宮木伸,牛島省,前野詩朗,吉田圭介

    計算工学講演会 

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    Event date： 2013.6

    Presentation type：Oral presentation (general)  

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  • 南海・東南海地震発生時の岡山市内への津波遡上シミュレーション

    吉田圭介,仲村春香,前野詩朗

    第65回土木学会中国支部研究発表会 

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    Event date： 2013.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 旭川大原箇所における植生流失限界に関する研究

    松山悟,吉田圭介,前野詩朗

    第65回土木学会中国支部研究発表会 

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    Event date： 2013.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 旭川における植生消長シミュレーションモデルを用いた河道内の樹林化予測

    三島望,吉田圭介,前野詩朗

    第65回土木学会中国支部研究発表会 

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    Event date： 2013.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 流水中の自然石に作用する流体力の評価

    竹内章人,吉田圭介,前野詩朗

    第65回土木学会中国支部研究発表会 

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    Event date： 2013.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 非構造格子有限体積法を用いた数値解析プログラムの精度向上

    松本享之,吉田圭介,前野詩朗

    第65回土木学会中国支部研究発表会 

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    Event date： 2013.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 2011 東北地方太平洋沖地震における谷津干潟での被害調査

    深谷雄司, 本永 麻衣子, 吉田圭介, 矢内栄二

    土木学会学術年次講演会全国大会 

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    Event date： 2012.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • CIP-Soroban

    吉田圭介, 箕浦靖久, 石川忠晴

    第23回数値流体力学シンポジウム  2009.12 

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    Event date： 2009.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 航空写真解析による洪水流表面流線図の作成

    伊波信太郎, 吉田圭介, 石川忠晴

    土木学会学術年次講演会全国大会  2006.9 

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    Event date： 2006.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 風シアーを伴う開水路乱流場における界面近傍組織構造について

    吉田圭介, 禰津家久, 垂井晃一

    土木学会関西支部学術年次講演会  2004.5 

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    Event date： 2004.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 風波・開水路混成場における乱流特性の時空間構造に関する実験的研究

    垂井晃一, 禰津家久, 池田大輔, 吉田圭介

    土木学会関西支部学術年次講演会  2003.5 

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    Event date： 2003.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 混合しない二相流体の数値解析法に関する研究

    吉田圭介, 岡崎慎一朗, 牛島省, 禰津家久

    土木学会関西支部学術年次講演会  2003.5 

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    Event date： 2003.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 開水路・風波混成流れにおける水層乱流構造に関する研究

    禰津家久, 牛島省, 吉田圭介, 濱田悟

    土木学会関西支部学術年次講演会  2002.5 

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    Event date： 2002.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 水・空気2層開水路流場における空気層界面の乱流構造に関する基礎的研究

    禰津家久, 牛島省, 吉田圭介, 濱田悟

    土木学会関西支部学術年次講演会 

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    Event date： 2002.5

    Presentation type：Oral presentation (general)  

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  • 5次精度QSIスキームを用いた自由液面流れの数値解析手法

    牛島省, 禰津家久, 吉田圭介, 池田大輔

    第15回数値流体力学シンポジウム, E07-1.  2001.12 

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    Event date： 2001.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • PIV法による閉鎖水域場の風波界面乱流構造に関する研究

    禰津家久, 牛島省, 吉田圭介

    土木学会関西支部学術年次講演会  2001.5 

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    Event date： 2001.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • PIV法による砕波を伴う風波の界面乱流構造に関する研究

    禰津家久, 井上理恵, 吉田圭介

    土木学会関西支部学術年次講演会  2000.5 

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    Event date： 2000.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Crack Detection in Asphalt-Paved Top Surface of River Embankments Using Unmanned Aerial Vehicles and Computer Vision Algorithms

    2023.6.10 

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    Language：English   Presentation type：Oral presentation (general)  

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  • 神西湖および差海川におけるヤマトシジミの形状特性・肥満度と生息環境場との関係

    勝海麻友, 矢島啓, 植田大貴, 管原庄吾, 吉田圭介

    第75回土木学会中国支部研究発表会  2023.6.10 

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  • 2021年の殿ダム貯水池におけるアオコ発生抑制に関する考察

    藤井陽, 矢島啓, 管原庄吾, 吉田圭介

    第74回土木学会中国支部研究発表会  2022.5.21 

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  • Assessing performance of a novel UAV-borne green LiDAR on vegetated rivers characterization: comparison with traditional airborne LiDAR bathymetry

    Md. Touhidul Islam, Keisuke Yoshida, Satoshi Nishiyama, Koichi Sakai

    9th Int. Symp. on Environmental Hydraulics 2021  2021.7.20 

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  • Riparian land-cover classification methodology of airborne laser bathymetry assisted deep learning of aerial photographs

    Shijun Pan, Keisuke Yoshida, Junichi Taniguchi, Akihide Watanabe

    9th Int. Symp. on Environmental Hydraulics 2021  2021.7.20 

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  • Potential of novel UAV-borne green lidar to characterize vegetated rivers: comparison with traditional airborne lidar

    Md. Touhidul ISLAM, Koichi SAKAI, Keisuke YOSHIDA, Satoshi NISHIYAMA

    2021.6.13 

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  • 河川堤防越流時の裏法面被覆コンクリートブロックに作用する流体力特性に関する基礎的研究

    安達森, 永田貴美久, 飯干富広, 忰熊公子, 吉田圭介

    第73回土木学会中国支部研究発表会  2021.6.13 

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  • SLAM 技術を導入した LiDAR 計測による河川堤防モニタリング手法の開発

    秋山菜乃香, 矢原諒, 﨑田晃基, 吉田圭介, 西山哲, 山崎文明

    第72回土木学会中国支部研究発表会  2020.6.6 

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  • 揚子江汽水域の流れの数値シミュレーション

    王 張嶠, 石川 忠晴, 吉田圭介

    第38回関東支部技術研究発表会  2011.5 

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Awards

  • Intelligence, Informatics and Infrastructure Outstanding Potential Paper Award

    2022.12   Japan Society of Civil Engineers   Drone-LiDAR-assisted Image Fusion methodology for Deep Learning-based Land Cover Classification

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    Award type：Honored in official journal of a scientific society, scientific journal  Country：Japan

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  • 八雲賞

    2022.11   公益財団法人 八雲環境科学振興財団   レーザー計測による3次元河道条件の推定と旭川分流堰周辺の洪水流解析への応用

    吉田圭介

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  • 研究奨励賞

    2021.4   公益財団 中国電力技術研究財団   航空レーザー測深データを活用した，洪水時の河川堤防の越流リスク予測手法の開発

    吉田圭介

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Research Projects

  • Accuracy improvement of vegetation dynamic sub-models using ALB-derived data and data assimilation

    Grant number：18K04370  2018.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YOSHIDA KEISUKE

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    Grant amount：\4420000 （ Direct expense: \3400000 、 Indirect expense：\1020000 ）

    Woody vegetation establishing thickly in rivers has recently posed a threat to our lives because of enhancing the risk of river flooding. For accurate risk estimation, this study developed a methodology for extracting efficiently the data of both river bed levels and vegetation conditions along a long river section, using techniques of airborne laser bathymetry (ALB) in practical use. For more precise numerical simulations of flood water levels, this study also proposed a simple sub-model that incorporates the mechanism of vegetation wash-out attributable to flood flows. Results showed that the method yields useful data from ALB in the targeted reach of the Asahi River, Japan, comparing the field observation data. Results also showed that the sub-model performs well for reproduction of actual vegetation situation observed after the Asahi River flooding that occurred during the 2018 western Japan heavy rainfall event.

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  • Improvement of riverbed and vegetation dynamics prediction model for strategic river management and its application to the field

    Grant number：16K06511  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Maeno Shiro, Akoh Ryosuke

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    Grant amount：\4680000 （ Direct expense: \3600000 、 Indirect expense：\1080000 ）

    In this study, improvement of riverbed dynamics and vegetation dynamics prediction model for strategic river management and basic experiments for on-site application and construction of simulation model were carried out.
    Simulations of floods were carried out using the riverbed topography of airbone laser bathymetry (ALB), which can measure under water bed surface using a green laser. Simulation results show in excelent agreement with the observed water level.
    In addition, in order to improve the accuracy of the flow out of vegetation near the edge of sand bar, we clarified the relationship between the condition of lodging of riparian trees at the eroded bank and the shear stress of the river bed obtained by the numerical analysis.

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  • Hydraulic study on river vegetation dynamics for efficient river management tasks

    Grant number：26820203  2014.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    YOSHIDA KEISUKE

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    Grant amount：\3900000 （ Direct expense: \3000000 、 Indirect expense：\900000 ）

    This study elucidates both vegetation dynamics and flow resistance because of vegetation establishment in the lower Asahi River flowing through Okayama city. For that purpose, we conducted field observations at three local sites in the river. We also developed both a vegetation dynamics model and a sequential data assimilation method (particle filter) for hydraulic numerical simulations. Results show that the vegetation dynamics model works well in a qualitative manner: it can reproduce the characteristics of both vegetation establishment and bed deformation that occurred at targeted local sites in the past decade or so. They also show that the data assimilation results give a reasonable explanation for the spatial distribution of roughness values due to the difference of rate of vegetation species establishing in subregions of the lower Asahi River.

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  • Numerical solver of river flows with secondary currents using new class of semi-structured mesh with waterline capturing technique

    Grant number：19760334  2007 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    YOSHIDA Keisuke

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    Grant amount：\2730000 （ Direct expense: \2400000 、 Indirect expense：\330000 ）

    河川実務に供する低負荷かつ高精度な計算モデルを構築し,併せて航空写真解析を行って,その実流動への適用性を検討した.主な成果は,(1)形状が不規則な実河川の広域流動を簡易に解析可能とした点,(2)二次流の効果を準三次元計算である程度表現した点,(3)少ない格子で高精度計算を実現するため,"斜めCIP-Soroban法"を創出した点である.また,航空写真解析では実体視と相関法を併用して高精度化と省力化を図った点も成果として挙げられる.

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  • 数値流体計算と画像処理を併用した河川流の解析法の開発

    2005

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    Grant type：Competitive

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  • Engineering Mathematics I （2023academic year） 1st and 2nd semester  - 木3～4

  • Numerical Hydraulics （2023academic year） Late  - その他

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Social Activities

  • これからの水防災を考える

    Role(s)：Lecturer

    日本損害保険協会，山陽新聞社  西日本豪雨から5年防災シンポジウム  2023.8.10

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    Type：Lecture

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  • おかやま学BOSAI（まなぼうさい）２０２３

    Role(s)：Organizing member

    岡山市  おかやま学BOSAI（まなぼうさい）２０２３  2023.7.2

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    Type：Seminar, workshop

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  • 気候変動下で頻発する水害への対応を考える

    Role(s)：Lecturer

    岡山大学  第74回SDGs岡大サイエンスカフェ  2019.11.8

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    Type：Science cafe

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  • 気候変動で増加した水害から命を守る防災

    Role(s)：Lecturer

    岡山大学  岡山大学70周年記念シンポジウム「岡山の水とくらし」  2019.7.6

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  • 近年の水災害に関する課題と取り組み

    Role(s)：Lecturer

    岡山大学 環境理工学部  岡山大学環境理工学部公開講座：都市の防災を考える  2018.8.25 - 2018.8.26

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    Type：Lecture

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