Updated on 2024/04/04

写真a

 
AKOH Ryosuke
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
External link

Degree

  • 博士（工） ( 2009.3   東京工業大学 )

Research Interests

  • Flood Flow Analysis

  • Hydraulics

  • Inundation Flow Analysis

  • Hydraulic Engineering for Disaster Prevention

Research Areas

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

Education

  • Tokyo Institute of Technology   大学院総合理工学研究科   創造エネルギー専攻

    2004.4 - 2009.3

    　 More details

    Country： Japan

    researchmap

  • Tokyo Institute of Technology   工学部   機械科学科

    2000.4 - 2004.3

    　 More details

    Country： Japan

    researchmap

Research History

  • Okayama University   Graduate School of Environmental, Life, Natural Science and Technology   Associate Professor

    2023.4

    　 More details

    Country：Japan

    researchmap

  • Okayama University   学術研究院環境生命科学学域   Associate Professor

    2021.4 - 2023.3

    　 More details

    Country：Japan

    researchmap

  • Okayama University   The Graduate School of Environmental and Life Science   Associate Professor

    2018.4 - 2021.3

    　 More details

    Country：Japan

    researchmap

  • Okayama University   The Graduate School of Environmental and Life Science   Assistant Professor

    2015.4 - 2017.9

    　 More details

    Country：Japan

    researchmap

  • Tokyo Institute of Technology   Interdisciplinary Graduate School of Science and Engineering   Assistant Professor

    2011.12 - 2015.3

    　 More details

    Country：Japan

    researchmap

  • Tokyo Institute of Technology   Interdisciplinary Graduate School of Science and Engineering

    2010.4 - 2011.11

    　 More details

    Country：Japan

    researchmap

  • Tokyo Institute of Technology   Interdisciplinary Graduate School of Science and Engineering

    2009.4 - 2010.3

    　 More details

    Country：Japan

    researchmap

▼display all

Committee Memberships

  • 国土交通省 中国地方整備局   「明日の高梁川を語る会」委員（オブザーバー）  

    2022.10   

    　 More details

    Committee type：Municipal

    researchmap

  • 国土交通省 中国地方整備局   「明日の吉井川を語る会」委員（オブザーバー）  

    2022.4   

    　 More details

    Committee type：Municipal

    researchmap

  • 国土交通省 中国地方整備局   「明日の旭川を語る会」委員（オブザーバー）  

    2022.4   

    　 More details

    Committee type：Municipal

    researchmap

 

Papers

  • Evaluation of behavior of floating litter during flooding with levee breach by using inundation analysis Reviewed

    Weijian Hua, Ryosuke Akoh, Kexin Liu, Shiro Maeno

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   79   2023.11

    　More details

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

    researchmap

  • Proposal of efficient analysis method for paddy field dam for river basin flood control and field application Reviewed

    Ryosuke Akoh, Tomoki Takuno, Daiki Matsui, Shiro Maeno

    79   2023.11

    　More details

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

    researchmap

  • A Study of the impact of backwater from the Takahashi River to a tributary Shinpon River Reviewed

    Tadaharu Ishikawa, Atsushi Kawachi, Ryosuke Akoh

    29   407 - 412   2023.6

    　More details

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

    DOI： 10.11532/river.29.0_407

    researchmap

  • Application of Running Water-Type Retarding Basin to Old Kinu River Floodplain, Japan Reviewed

    Tadaharu Ishikawa, Ryosuke Akoh

    Hydrology   10 ( 4 )   94 - 94   2023.4

    　More details

    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

    In the upper and middle reaches of rivers in Japan, river channels used to meander in a comparatively narrow floodplain and heavy rain runoff used to naturally expand over the entire floodplain, retarding floods toward the downstream. Recent continuous levee building to prevent river overflow has had two kinds of negative effects, namely an increase in flood damage in areas of a floodplain closed by levees and river terraces at the time of runoff over the river channel capacity, and an increase in the flood peak toward the downstream. This study introduces the concept of a running water-type retarding basin that mitigates flood damage by allowing excess runoff to pass through the floodplain, restoring a natural hydrological process. After a description of the concept of the facility design, a design example is presented for a closed floodplain of the Kinu River Floodplain, where excess runoff caused severe flood damage in 2015, to quantify the performance and effects of the running water-type retarding basin.

    DOI： 10.3390/hydrology10040094

    researchmap

  • Measurement and Computational Study of Underwater Topography Reviewed

    Satoshi Iwakami, Masahiko Tamega, Masahide Sanada, Michiaki Mohri, Yoshitaka Iwakami, Naoki Okamoto, Eishi Mitsui, Hidetaka Chikamori, Ryosuke Akoh, Shuji Jimbo, Masaji Watanabe

    Journal of Geoscience and Environment Protection   11 ( 4 )   203 - 209   2023.4

    　More details

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

    DOI： 10.4236/gep.2023.114012

    researchmap

  • Flood Disaster Mitigation Strategy in the Early Modern Age in Japan (The Beginning of 17th to the Mid-19th Century) Reviewed

    Tadaharu Ishikawa, Ryosuke Akoh, Hiroshi Senoo

    International Journal of Environmental Impacts   6 ( 1 )   1 - 6   2023.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：International Information and Engineering Technology Association  

    DOI： 10.18280/ijei.060101

    researchmap

  • INVESTIGATION OF FLOOD CONTROL MEASURES USING RICE FIELDS IN THE KARUBE RIVER BASIN OF THE TAKAHASHI RIVER SYSTEM Reviewed

    Ryosuke AKOH, Yuto IKEJIRI, Shiro MAENO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   78 ( 2 )   I_253 - I_258   2022.11

    　More details

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

    DOI： 10.2208/jscejhe.78.2_i_253

    researchmap

  • NUMERICAL SIMULATION OF COUPLED DEBRIS FLOW AND INUNDATION DISASTER CONSIDERING MICROTOPOGRAPHY: A CASE STUDY OF NIIMI CITY, 2019 Reviewed

    Weijian HUA, Ryosuke AKOH, Shiro MAENO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   78 ( 2 )   I_673 - I_678   2022.11

    　More details

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

    DOI： 10.2208/jscejhe.78.2_i_673

    researchmap

  • INUNDATION SIMULATION OF THE SUNA RIVER AND EVALUATION OF BANK BREAK USING BREACH PREDICTION METHOD Reviewed

    Ryosuke AKOH, Koichi NISHIMATA, Yuto IKEJIRI, Shiro MAENO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   78 ( 2 )   I_667 - I_672   2022.11

    　More details

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

    DOI： 10.2208/jscejhe.78.2_i_667

    researchmap

  • ON EARLY DRAINAGE OF FLOOD FROM A CLOSED FLOODPLAIN USING AN INVERSE SIPHON AND COUNTERMEASURE AGAINST EXCESS FLOODS Reviewed

    Ryosuke AKOH, Tadaharu ISHIKAWA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   78 ( 2 )   I_229 - I_234   2022.11

    　More details

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

    DOI： 10.2208/jscejhe.78.2_i_229

    researchmap

  • PHYSICAL ENVIRONMENTAL CHARACTERISTICS OF THE OTOGO TIDAL FLAT IN THE YOSHII RIVER AND PROPOSAL OF NEW TIDAL FLAT CREATION SITES Reviewed

    Mohammed AL-BAGHDADI, Ryosuke AKOH, Shiro MAENO

    Journal of JSCE   10 ( 1 )   467 - 478   2022.9

    　More details

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

    DOI： 10.2208/journalofjsce.10.1_467

    researchmap

  • INFLUENCE OF THE FLOODPLAIN CONDITION CHANGE OF UPPER KUMA RIVER ON THE FLOOD RUNOFF IN 2020 Reviewed

    Tadaharu ISHIKAWA, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   77 ( 1 )   185 - 190   2021.12

    　More details

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

    DOI： 10.2208/jscejhe.77.1_185

    researchmap

  • PREDICTION OF LEVEE BREAK DUE TO OVERFLOW USING FLOOD SIMULATION RESULTS IN MABI DISTRICT OF KURASHIKI CITY Reviewed

    Ryosuke AKOH, Weijian HUA, Shiro MAENO

    77 ( 2 )   I_367 - I_372   2021.11

    　More details

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

    researchmap

  • 内水氾濫と外水氾濫を考慮した効果的な避難場所設置と避難開始時刻の検討 Reviewed

    赤穗 良輔, 西俣 孝一, 池尻 悠人, 華 威鑒, 前野 詩朗

    土木学会論文集B1(水工学)   77 ( 2 )   I_1495 - I_1500   2021.11

    　More details

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

    researchmap

  • NUMERICAL STUDY ON FLOOD CONTROL FUNCTION OF RUNNING WATER TYPE RETARDING BASIN LOCATED ALONG VALLEY BOTTOM PLAIN RIVERS Reviewed

    Yasushi ITOH, Tadaharu ISHIKAWA, Ryousuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   76 ( 2 )   I_451 - I_456   2020

    　More details

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

    DOI： 10.2208/jscejhe.76.2_i_451

    researchmap

  • TRIAL DESIGN AND NUMERICAL EXPERIMENT OF A RUNNING-WATER-TYPE RETARDING BASIN FOR THE IMPROVEMENT OF FLOOD CONTROL EFFICIENCY IN THE UPPER ABUKUMA RIVER Reviewed

    Shota HARADA, Tadaharu ISHIKAWA, Ryosuke AKOH, Shiro MAENO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   76 ( 2 )   I_457 - I_462   2020

    　More details

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

    DOI： 10.2208/jscejhe.76.2_i_457

    researchmap

  • Assessment of flood risk management in lowland Tokyo areas in the seventeenth century by numerical flow simulations Reviewed

    Tadaharu Ishikawa, Ryosuke Akoh

    Environmental Fluid Mechanics   19 ( 5 )   1295 - 1307   2019.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s10652-018-9616-6

    researchmap

    Other Link： http://link.springer.com/article/10.1007/s10652-018-9616-6/fulltext.html

  • Flooding Along Oda River Due to the Western Japan Heavy Rain in 2018 Reviewed

    Yasuo Nihei, Asataro Shinohara, Kaho Ohta, Shiro Maeno, Ryosuke Akoh, Yoshihisa Akamatsu, Takashi Komuro, Tomoya Kataoka, Shiho Onomura, Ryo Kaneko

    Journal of Disaster Research   14 ( 6 )   874 - 885   2019.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Fuji Technology Press Ltd.  

    The heavy rain that hit Western Japan in July 2018 triggered the worst rain-related disaster in the Heisei era, with the total of dead and missing persons exceeding 230, mainly in the Hiroshima and Okayama Prefectures. At several locations along Oda River (of the Takahashi river system) and its tributaries, dikes were breached due to large-scale flood, leaving 51 persons dead. This paper aims to shed light on the scale of inundation along Oda River and its tributaries and identify the characteristics of and critical factors for human damage. Field surveys were conducted to measure flood marks in flooded areas and river channels, and gauge the extent of damage to people and property. The surveys found that a large area was inundated on the north side of Oda River, with an inundation depth exceeding 5 m for 1 km in the south-north direction and 3.5 km in the east-west direction, which made vertical evacuation of residents difficult. The findings that about 80% of the dead were found on the first floor of their houses, with those who had lived in a one-story house and those who had lived in a two-story house accounting for 50% each of the deceased, indicate how difficult even vertical evacuation was. The findings appear to be related to the considerable inundation depth and high rate of water level increase, along with the fact that the majority of the deceased were elderly people.

    DOI： 10.20965/jdr.2019.p0874

    researchmap

  • DISASTER STATE IN THE MIDDLE REACH OF THE TAKAHASHI RIVER DUE TO THE HEAVY RAIN IN JULY 2018 AND INVESTIGATION OF FLOODING CHARACTERISTICS USING NUMERICAL SIMULATION Reviewed

    Ryosuke AKOH, Shiro MAENO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 1 )   378 - 386   2019

    　More details

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

    DOI： 10.2208/jscejhe.75.1_378

    researchmap

  • DEVELOPMENT OF FLOOD DISCHARGE ESTIMATION METHOD USING NUMERICAL FLOAT MODEL AND DIEX METHOD, AND IT’S APPLICATION FOR RIVERS Reviewed

    Ryosuke AKOH, Shiro MAENO, Akito NAKAYAMA, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 2 )   I_625 - I_630   2019

    　More details

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

    DOI： 10.2208/jscejhe.75.2_i_625

    researchmap

  • 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

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

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 1 )   387 - 402   2019

    　More details

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

    DOI： 10.2208/jscejhe.75.1_387

    researchmap

  • FLOOD SIMULATION MODEL COUPLED WITH VEGETATION WASH-OUT CONSIDERING HORIZONTAL DISTRIBUTION OF VEGETATION HEIGHT AND NON-DIMENSIONAL CRITICAL TRACTIVE FORCE Reviewed

    Keisuke YOSHIDA, Shiro MAENO, Kimihisa NAGATA, Shinya NIGO, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 2 )   I_325 - I_330   2019

    　More details

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

    DOI： 10.2208/jscejhe.75.2_i_325

    researchmap

  • STATISTICAL ANALYSIS OF RAINFALL IN OKAYAMA PREFECTURE AND INVESTIGATION OF FLOOD DAMAGES IN THE ASAHI RIVER BASIN ATTRIBUTABLE TO THE HEAVY RAIN EVENT OF JULY 2018 Reviewed

    Keisuke YOSHIDA, Shiro MAENO, Ryoji KUDO, Hidetaka CHIKAMORI, Ryosuke AKOH, Shuhei OGAWA, Kimihisa NAGATA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 1 )   172 - 183   2019

    　More details

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

    DOI： 10.2208/jscejhe.75.1_172

    J-GLOBAL

    researchmap

  • FLOOD INUNDATION MAPPING BY ASSIMILATING LOCAL INFORMATION -PRACTICAL IMPROVEMENT AND APPLICATION TO THE ODA RIVER FLOODING IN JULY 2017- Reviewed

    Takahiro SAYAMA, Ryotaro SHIMIZU, Makiko IGUCHI, Yoshitada MINAMI, Ryosuke AKOH, Kaoru TAKARA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   75 ( 2 )   I_1465 - I_1470   2019

    　More details

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

    DOI： 10.2208/jscejhe.75.2_i_1465

    researchmap

  • EFFECT OF RESOLUTION OF RIVER BED ELEVATION DATA AND MESH SIZE ON RIVERBED VARIATION ANALYSIS Reviewed

    Akito Nakayama, Ryosuke Akoh, Shiro Maeno, Keisuke Yoshida

    24   107 - 112   2018.6

    　More details

    Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s10652-018-9616-6

    researchmap

    Other Link： http://link.springer.com/article/10.1007/s10652-018-9616-6/fulltext.html

  • STUDY OF INUNDATION FLOW ANALYSIS CONSIDERING EFFECT OF SMALL TOPOGRAPHY AND NUMERICAL EXPERIMENT OF THE KINU RIVER INUNDATION AREA Reviewed

    Ryosuke AKOH, Shiro MAENO, Keisuke YOSHIDA, Yoshitake TAKAHASHI, Tadaharu ISHIKAWA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 4 )   I_1441 - I_1446   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.i_1441

    researchmap

  • STUDY ON BASIC EXPERIMENT AND OPTIMUM COMPUTATIONAL MESH SIZE FOR HIGH ACCURACY ANALYSIS OF BANK EROSION OF LOW WATER CHANNEL Reviewed

    Ryuji TANAKA, Ryosuke Akoh, Shiro MAENO, Akito NAKAYAMA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 5 )   I_1117 - I_1122   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.5_i_1117

    researchmap

  • NUMERICAL STUDY ON FLOOD CONTROL FUNCTION OF LEVEE OPENINGS LOCATED ALONG VALLEY BOTTOM PLAIN RIVERS IN THE PAST Reviewed

    Yasushi ITOH, Ryousuke AKOH, Tadaharu ISHIKAWA, Shiroh MAENO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 5 )   I_1531 - I_1536   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.5_i_1531

    researchmap

  • EVALUATION OF DISCHARGE EQUATION OF LATERAL OVERFLOW LOCATED IN THE CURVED PART OF RIVER Reviewed

    Masayoshi ISHIHARA, Ryosuke AKOH, Shiro MAENO, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 5 )   I_841 - I_846   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.5_i_841

    researchmap

  • INFLUENCE OF CHANNEL NETWORK ON TSUNAMI INUNDATION UNDER NANKAI TROUGH EARTHQUAKE Reviewed

    Kenta KUDAI, Shiro MAENO, Ryosuke AKOH, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 4 )   I_439 - I_444   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.i_439

    researchmap

  • ESTIMATION OF VEGETATION DENSITY OF TREES USING ALB POINT CLOUD DATA Reviewed

    Keisuke YOSHIDA, Shiro MAENO, Syuhei OGAWA, Sadayuki ISEKI, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 4 )   I_547 - I_552   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.i_547

    researchmap

  • EXPERIMENTAL STUDY ON SETTING METHOD OF BUILDING POROSITY FOR FLOOD FLOW ANALYSIS IN URBAN AREA Reviewed

    Ryosuke AKOH, Shiro MAENO, Shun OGAWA, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 4 )   I_1525 - I_1530   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.i_1525

    researchmap

  • PHYSICAL ENVIRONMENT EVALUATION OF THE SPAWNING FOR AYU BASED ON ESTIMATION OF FLOW FIELD AND SEDIMENT BEHAVIOR USING ALB DATA IN THE LOWER ASAHI RIVER Reviewed

    Keisuke YOSHIDA, Shiro MAENO, Sachio TAKAHASHI, Shinya NIGO, Shuhei OGAWA, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   74 ( 5 )   I_421 - I_426   2018

    　More details

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

    DOI： 10.2208/jscejhe.74.5_i_421

    researchmap

  • STUDY ON THE IMPROVEMENT EFFECT OF APPLICATION OF ALB FOR RIVER CHANNEL TOPOGRAPHY ON RIVER-BED VARIATION ANALYSIS

    YAMAGUCHI Kaho, YOSHIDA Keisuke, MAENO Shiro, MANO Koji, AKOH Ryosuke, NISHIYAMA Satoshi

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   74 ( 2 )   I_465 - I_474   2018

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    Developing technologies of Airborne Laser Bathymetry (ALB) have recently enabled us to obtain topographical data on river channels including underwater area. The reproducibility of river channel topography is estimated to effect on numerical analysis for river. However, there are few studies using ALB data, so the effect of it on analysis results has not been considered in particular.<br>In this study, the topography data obtained by ALB measurement is examined the accuracy. Furthermore, we studied the effect of the topography data on analysis by comparing results of river-bed variation analysis and the difference data of ALB measurement.<br>The topography data obtained ALB measurement showed the same topographical shape as cross-sectional survey result. In addition, by comparing analysis results and the difference data of ALB measurement, analysis using ALB data showed a trend similar to measured value than using conventional data.

    DOI： 10.2208/jscejam.74.I_465

    CiNii Article

    researchmap

  • High-resolution modeling of tsunami run-up flooding: a case study of flooding in Kamaishi city, Japan, induced by the 2011 Tohoku tsunami Reviewed

    Ryosuke Akoh, Tadaharu Ishikawa, Takashi Kojima, Mahito Tomaru, Shiro Maeno

    Natural Hazards and Earth System Sciences   17 ( 11 )   1871 - 1883   2017.11

    　More details

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

    Abstract. Run-up processes of the 2011 Tohoku tsunami into the city of Kamaishi, Japan, were simulated numerically using 2-D shallow water equations with a new treatment of building footprints. The model imposes an internal hydraulic condition of permeable and impermeable walls at the building footprint outline on unstructured triangular meshes. Digital data of the building footprint approximated by polygons were overlaid on a 1.0 m resolution terrain model. The hydraulic boundary conditions were ascertained using conventional tsunami propagation calculation from the seismic center to nearshore areas. Run-up flow calculations were conducted under the same hydraulic conditions for several cases having different building permeabilities. Comparison of computation results with field data suggests that the case with a small amount of wall permeability gives better agreement than the case with impermeable condition. Spatial mapping of an indicator for run-up flow intensity (IF = (hU2)max, where h and U respectively denote the inundation depth and flow velocity during the flood, shows fairly good correlation with the distribution of houses destroyed by flooding. As a possible mitigation measure, the influence of the buildings on the flow was assessed using a numerical experiment for solid buildings arrayed alternately in two lines along the coast. Results show that the buildings can prevent seawater from flowing straight to the city center while maintaining access to the sea.

    DOI： 10.5194/nhess-17-1871-2017

    researchmap

  • NUMERICAL STUDY ON THE FLOOD CONTROL CAPABILITY OF NIHON-TSUTSUMI SYSTEM IN EDO PERIOD Reviewed

    Tadaharu ISHIKAWA, Ryosuke AKOH, Yuki KOBAYASHI

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   73 ( 4 )   I_1387 - I_1392   2017.2

    　More details

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

    DOI： 10.2208/jscejhe.73.i_1387

    CiNii Article

    CiNii Books

    researchmap

  • IMPROVEMENT OF THE FLOAT MEASUREMENT METHOD FOR RIVER DISCHARGE USING QUASI-3D FLOW ANALYSIS Reviewed

    Ryosuke AKOH, Shiro MAENO, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   73 ( 4 )   I_517 - I_522   2017.2

    　More details

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

    DOI： 10.2208/jscejhe.73.i_517

    CiNii Article

    CiNii Books

    researchmap

  • ACCURACY VALIDATION OF PLANAR RIVER BED SURVEY USING AIRBORNE LASER BATHYMETRY AND EXAMINATION OF THE IMPROVEMENT EFFECT ON RIVER FLOW ANALYSIS Reviewed

    Keisuke YOSHIDA, Shiro MAENO, Koji MANO, Kaho YAMAGUCHI, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   73 ( 4 )   I_565 - I_570   2017.2

    　More details

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

    DOI： 10.2208/jscejhe.73.i_565

    CiNii Article

    CiNii Books

    researchmap

  • METHOD FOR REALTIME PREDICTION OF TSUNAMI PEAK HITTING OKAYAMA OFFSHORE USING FOURIER ANALYSIS Reviewed

    Kenta KUDAI, Shiro MAENO, Ryosuke AKOH, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   73 ( 4 )   I_1027 - I_1032   2017.2

    　More details

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

    DOI： 10.2208/jscejhe.73.i_1027

    CiNii Article

    CiNii Books

    researchmap

  • EXAMINATION OF VEGETATION MANAGEMENT AROUND A FIXED WEIR AT THE BIFURCATION POINT OF THE HYAKKEN RIVER TO CONTROL A PROPER DIVERSION DISCHARGE Reviewed

    Yasutaka HIRAI, Shiro MAENO, Keisuke YOSHIDA, Tomohiro IWAKI, Syuhei OGAWA, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   73 ( 4 )   I_1081 - I_1086   2017.2

    　More details

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

    DOI： 10.2208/jscejhe.73.i_1081

    CiNii Article

    CiNii Books

    researchmap

  • INVESTIGATION OF RESILIENT COASTAL DIKE STRUCTURE WITH GEOTEXTILE IN THE BACK EMBANKMENT Reviewed

    Tomihiro IIBOSHI, Shiro MAENO, Yusuke TAI, Keisuke YOSHIDA, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)   73 ( 2 )   I_1075 - I_1080   2017

    　More details

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

    &nbsp;Partial or complete destruction of coastal dikes were reported due to the landward bed scouring caused by the huge tsunami overflow. Considering these background, resilient structural design is required for the future improvement of coastal dikes. A dike with back embankment can be expected to improve not only the dike protection effect but also the environment and landscape of the coastal area. Therefore, resiliency of such structure was investigated in this study. And considering the situation after the total destruction of back embankment material, stability of landward slope armor concrete block was investigated as well.<br>&nbsp;As a result, It was clarified that structure of installing the scour protection sheet, and waterproof sheet with concrete block in the embankment could extend the time until the total destruction of back embankment. Although the landward slope protection concrete block with protuberance roughness showed that hydrodynamic force increased in comparison with a flat surface block, it was confirmed that destruction of overturning and lift mode did not occur for all cases.

    DOI： 10.2208/kaigan.73.i_1075

    CiNii Article

    researchmap

  • Estimation of flood risk management in 17th Century on Okayama Alluvial plain, Japan, by numerical flow simulation Reviewed

    Tadaharu Ishikawa, Ryosuke Akoh

    International Journal of Safety and Security Engineering   6 ( 3 )   455 - 465   2016.8

    　More details

    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：International Information and Engineering Technology Association  

    DOI： 10.2495/safe-v6-n3-455-465

    researchmap

  • Soil salinity reduction by river water irrigation in a reed field: A case study in Shuangtai Estuary Wetland, Northeast China Reviewed

    Qian Lin, Tadaharu Ishikawa, Ryosuke Akoh, Fenglin Yang, Shushen Zhang

    Ecological Engineering   89   32 - 39   2016.4

    　More details

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

    DOI： 10.1016/j.ecoleng.2016.01.003

    researchmap

  • NUMERICAL STUDY ON THE CAPABILITY OF HYAKKEN-GAWA FLOODWAY IN EDO PERIOD Reviewed

    Tadaharu ISHIKAWA, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   72 ( 4 )   I_343 - I_348   2016.3

    　More details

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

    DOI： 10.2208/jscejhe.72.i_343

    researchmap

  • FIELD STUDY ON THE FLOOD FLOW AT THE CONJUNCTION OF COMPOUND CHANNELS &mdash;THE CASE OF THE CONJUNCTION OF THE TONE RIVER AND THE WATARASE RIVER&mdash; Reviewed

    Tadaharu ISHIKAWA, Ryosuke AKOH, Nanae ARAI, Run TIAN

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   72 ( 4 )   I_331 - I_336   2016.2

    　More details

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

    DOI： 10.2208/jscejhe.72.i_331

    researchmap

  • PREDICTION MODEL OF TSUNAMI HITTING OKAYAMA CITY USING WAVEFORM AT NARUTO AND AKASHI CHANNEL UNDER NANKAI TROUGH EARTHQUAKE Reviewed

    Kenta KUDAI, Shiro MAENO, Ryosuke AKOH, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   72 ( 4 )   I_379 - I_384   2016.2

    　More details

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

    DOI： 10.2208/jscejhe.72.i_379

    researchmap

  • EXAMINATION OF PHYSICAL ENVIRONMENTAL CHANGES AFTER GRAVEL BAR RESTORATION USING A SIMULATION MODEL WITH VEGETATION GROWTH AND DISAPPEARANCE Reviewed

    Yasutaka HIRAI, Shiro MAENO, Keisuke YOSHIDA, Syunsuke FUJITA, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   72 ( 4 )   I_1063 - I_1068   2016.2

    　More details

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

    DOI： 10.2208/jscejhe.72.i_1063

    researchmap

  • STUDY OF EVACUATION TIME CHARACTERISTICS COUPLED WITH NUMERICAL SIMULATION OF TSUNAMI IN OKAYAMA CITY Reviewed

    Ryosuke AKOH, Shiro MAENO, Yoshitake TAKAHASHI, Kenta KUDAI, Keisuke YOSHIDA

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)   72 ( 2 )   I_289 - I_294   2016

    　More details

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

    &nbsp;Southern part of Okayama city is a low elevation area and has a great risk of liquefaction. Therefore coastal dike may possible subside due to the Nankai Trough earthquake and inundation just after quake is supposed to occur. In this study, we predicted the process of inundation in Okayama city caused by the dike subsidence, using the tsunami simulator that reproduced the layout of the city area in detail. Furthermore, evacuation routes and time to designated evacuation sites were evaluated by using the walking speed under the flooding conditions. The results show that many evacuation routes are changed by the inundation on the roads and the evacuation time of senior person becomes 1.6 times on average. This suggests that it is important for the evacuation planning to consider the water depth and the flow speed on the road. The present model is useful to investigate the evacuation time characteristic under the inundation conditions.

    DOI： 10.2208/kaigan.72.i_289

    CiNii Article

    researchmap

  • EXPERIMENTAL STUDY ON FAILURE CHARACTERISTICS OF TOE PROTECTION WORKS FOR COASTAL DIKES DUE TO TSUNAMI OVERFLOW IN EARLY IMPULSIVE STAGE Reviewed

    Shiro MAENO, Keisuke YOSHIDA, Daisuke ARAKI, Yusuke TAI, Tomihiro IIBOSHI, Ryosuke AKOH

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)   72 ( 2 )   I_1135 - I_1140   2016

    　More details

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

    &nbsp;Tenacious structures for mitigating devastating disaster of tsunami overflows have been recently required for coastal dikes in Japan. As one of the hard countermeasures, it is suggested to install landward toe protection works. However, hydrodynamic characteristics of impulsive forces acting on the works in tsunami overflows have not been clarified thoroughly in previous studies.<br>&nbsp;In this study, we experimentally investigated the impulsive forces affecting on failures of the works, which occur at an early stage of tsunami overflows. In the experiments, four types of concrete blocks were used for the landward slope and toe protection works, and we systematically changed the tsunami height and the block type used for the works. For each experimental case, we took videos of the corresponding failure. We also measured drag, lift forces, and moments acting on the blocks.<br>&nbsp;Results showed that the upward force observed during a very short time after tsunami flow lands on the blocks is the key factor triggering the washout of the toe protection works. The results also showed that the location of the block flowing out firstly from the works is approximately determined by the tsunami height and the block type.

    DOI： 10.2208/kaigan.72.i_1135

    CiNii Article

    researchmap

  • NUMERICAL SIMULATIONS OF HYDRODYNAMIC FORCE ACTING ON LANDWARD TOE PROTECTION BLOCKS OF COASTAL DIKE DURING TSUNAMI OVERFLOW Reviewed

    Keisuke YOSHIDA, Shiro MAENO, Akihito TAKEUCHI, Ryosuke AKOH, Tomihiro IIBOSHI, Daisuke ARAKI

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   72 ( 2 )   I_485 - I_494   2016

    　More details

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

    DOI： 10.2208/jscejam.72.i_485

    researchmap

  • INFLUENCE OF RICE PADDY OPERATION ON RIVER FLOW RATE -CASE STUDY IN THE LOWER REACH OF THE EAI RIVER, MIYAGI PREFECTURE- Reviewed

    Yi ZHANG, Yuma ASAI, Tadaharu ISHIKAWA, Ryosuke AKOH, Kuniyoshi SHIMA, Hisataka ISOBE, Makoto ANDO

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   71 ( 4 )   I_337 - I_342   2015.2

    　More details

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

    Irrigation process for paddy field and its influence on river flow rate was investigated in the lower reach of the Eai River which is one of the representative rice producing areas in Tohoku district. The water stage, intake rate and outflow rate was measured continuously in a paddy field through the whole irrigation period from the puddling stage to the final drying stage in 2014. After the water balance analysis including the terms of evapotranspiration, infiltration and rainfall, the empirical rule for rice paddy operation was formulated to predict the response of paddy field to weather condition. The model performance was examined and verified for condition in 2013.

    DOI： 10.2208/jscejhe.71.i_337

    CiNii Article

    CiNii Books

    researchmap

  • A HYDRAULIC STUDY ON THE DESIGN OF HYAKKEN RIVER CONSTRUCTION IN THE EDO PERIOD Reviewed

    Tadaharu ISHIKAWA, Ryosuke AKOH, Hideo KIKKAWA, Yuuki KOBAYASHI

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   71 ( 4 )   I_613 - I_618   2015.2

    　More details

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

    This paper presents a set of numerical flow simulations to investigate the flood control ability of the Hyakken River channel which was constructed as a floodway of the Asahi River for preventing inundation of Okayama Castle in the 17th century when the modern hydraulics had not been developed. Calculation conditions like the channel topography and the design flood discharge were estimated by comparing the old description about the channel with the numerical data obtained in recent days. The computation by using unsteady shallow water equations showed the results which correspond to the records of flood events of the day, and the results also suggested that the channel was designed very reasonably even without the modern knowledge of hydraulics.

    DOI： 10.2208/jscejhe.71.i_613

    CiNii Article

    CiNii Books

    researchmap

  • THE FLOOD SIMULATION OF THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE TSUNAMI IN URBAN AREA OF KAMAISHI BAY Reviewed

    Ryosuke AKOH, Tadaharu ISHIKAWA, Shunichi HATAKEYAMA, Takashi KOJIMA, Mahito TOMARU, Takashi NAKAMURA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   71 ( 1 )   16 - 27   2015

    　More details

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

    The tsunami run-up in the Kamaishi city caused by the 2011 off the Pacific coast of Tohoku Earthquake was simulated numerically by the 2-D shallow water model with fine grids resolving the roads and buildings. Additionally, a new semipermeable building model was conducted to considering the water volume flooded into the buildings. Compared with the ordinary model which considers the effect of buildings by adjusting the Manning's roughness coefficient, the maximum water levels in our model has higher correlation with the tsunami traces. In the coastal area, our calculations gave time series of water depth more consistent with the observation by the digital photo analysis. It means that the numerical accuracy gets improved by considering the collapse of buildings. In addition, it is shown that this model can estimate the tsunami time travel more reasonably than the ordinary model.

    DOI： 10.2208/jscejhe.71.16

    CiNii Article

    researchmap

  • NUMERICAL ERRORS OF TSUNAMI SIMULATION BY FINITE VOLUME METHODS ON UNSTRUCTURED TRIANGULAR MESH AND EFFICIENCY OF ADAPTIVE MESH REFINEMENT TECHNIQUE Reviewed

    Xinxiang ZENG, Takashi NAKAMURA, Ryosuke AKOH, Tadaharu ISHIKAWA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   70 ( 4 )   I_793 - I_798   2014.2

    　More details

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

    Features of numerical errors of Tsunami simulation using unstructured triangular meshes with finite volume methods investigated quantitatively. A series of test simulations of the Tsunami wave propagating in thedee(are) p area shows that the numerical diffusion errors strongly depend on the spatial size of mesh, kind of the adopted numerical scheme and the travel distance to be solved. Furthermore, introduction of an Adaptive Mesh Refinement (AMR) technique to the triangular unstructured mesh system is investigated. By conducting numerical simulation of the Tsunami propagation for 2011 Tohoku Earthquake, it is found that the AMR technique can suppress the numerical errors and reduce the required computational loads.

    DOI： 10.2208/jscejhe.70.i_793

    CiNii Article

    researchmap

    Other Link： https://jlc.jst.go.jp/DN/JLC/20010509966?from=CiNii

  • LONG-TERM SIMULATION ON THE VARIATION OF SALINITY CONDITION IN LAKE OGAWARA Reviewed

    Takashi KINOSHITA, Ryosuke AKOH, Tadaharu ISHIKAWA, Yasushi TSURUTA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   70 ( 4 )   I_1609 - I_1614   2014.2

    　More details

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

    Lake Ogawara is becoming eutrophicated very rapidly due to the contaminant upwelling from the anaerobic saline water layer. The authors have already developed a practical simulation model to predict the saline water intruding in winter. In this paper, the previous model is improved by adding the effect of thermal stratification and the current in saline layer. Then, year-round calculation was conducted to investigate the expansion of the anaerobic saline water layer in the recent ten years. The model reasonably reproduced the field measurement results on seasonal change and long-term expansion of saline water layer. The simulation result confirms that the expansion of saline water layer and the saline water entrainment are the primary reasons for the eutrophication in surface layer. It also suggests these events occur mainly in winter, when seawater intrudes frequently and thermal stratification is absent.

    DOI： 10.2208/jscejhe.70.i_1609

    CiNii Article

    researchmap

    Other Link： https://jlc.jst.go.jp/DN/JLC/20010509232?from=CiNii

  • DEVELOPMENT OF A TWO-DIMENSIONAL DISPERSION MODEL FOR THE SEAWATER INTRUSION IN TAKASE RIVER Reviewed

    Ryosuke AKOH, Tadaharu ISHIKAWA, Misaki YASUKOUCHI, Yasuchi TSURUTA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   70 ( 4 )   I_877 - I_882   2014.2

    　More details

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

    This study proposes a new depth-averaged two-dimensional convection-dispersion model to investigate the seawater intrusion in well-mixed estuary. The new model considers both barotropic salinity flux and the baroclinic flux caused by weak salinity stratification. Liner salinity profile was assumed and physically meaningful baroclinic flux model was constructed base on hydrodynamic consideration. Then, model verification was carried out by simulating seawater intrusion in Takase River. In the new model, the salinity front arrived earlier and the peak value became stronger, which agrees better with the field data measured at Takase Bridge.

    DOI： 10.2208/jscejhe.70.i_877

    CiNii Article

    researchmap

    Other Link： https://jlc.jst.go.jp/DN/JLC/20010509133?from=CiNii

  • BASIC STUDY ON MODELING THE LONG TERM VARIATION OF SALINITY CONDITION IN LAKE OGAWARA Reviewed

    19   549 - 554   2013.6

    　More details

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

    DOI： 10.2208/jscejhe.70.i_1609

    researchmap

  • THE PULSATILE SEDIMENT TRANSPORT AND ITS SEASONAL CHANGE IN THE ESTUARINE CHANNEL OF YANGTZE RIVER Reviewed

    19   199 - 204   2013.6

    　More details

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

    researchmap

  • ON THE EFFICIENCY OF GPGPU ACCELERATION OF TSUNAMI SIMULATIONS USING AN UNSTRUCTURED TRIANGULAR MESH SYSTEM Reviewed

    Xinxiang ZENG, Ryosuke AKOH, Tadaharu ISHIKAWA, Takashi NAKAMURA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   69 ( 4 )   I_619 - I_624   2013.2

    　More details

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

    DOI： 10.2208/jscejhe.69.i_619

    CiNii Article

    researchmap

  • FIELD STUDY ON SOIL WATER CONTENT VARIATION JUST AFTER IRRIGATION PERIOD IN THE REED COLONY OF SHUANGTAI WETLAND, CHINA Reviewed

    Qian LIN, Tadaharu ISHIKAWA, Ryosuke AKOH, Fenglin YANG, Shushen ZHANG

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   69 ( 4 )   I_529 - I_534   2013.2

    　More details

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

    DOI： 10.2208/jscejhe.69.i_529

    CiNii Article

    researchmap

  • Rapid Tsunami Simulator on GPU using Unstructured Mesh System Reviewed

    Xinxiang Zeng, Takashi Nakamura, Ryosuke Akoh, Tadaharu Ishikawa

    PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS III AND IV   2013

    　More details

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

    The powerful Tsunami triggered by 2011 Tohoku earthquake (also known as the Great East Japan Earthquake) have attacked Japan's northeast Pacific coast and caused tremendous devastation there. The run-up Tsunami were observed in rivers connecting with Pacific Ocean and even intruded into inland of northeast Japan which was expanded the extent of the damages indeed. In that context, it is necessary to give accurate early warning to safeguard the populations from Tsunami. Meanwhile, detailed numerical analysis of run-up Tsunami in rivers using finer mesh is also a topic should be studied immediately. However, on account of the huge spatial scale, the computational load of Tsunami simulation tends to be too large to afford. Furthermore, it is essential to use finer mesh to reproduce the complex topography of coastline and rivers accurately. In order to overcome these difficulties, a rapid numerical simulator has been constructed by applying the GPGPU technology in solving the 2-dimensional shallow water equations. An explicit finite volume scheme is used to discrete the shallow water equations on unstructured triangular mesh system. Owing to the use of unstructured triangle mesh, the complex boundary such as coastline and river banks is represented well. With the power of GPGPU, real-time simulation of Tsunami movement is achieved, even though using finer meshes, which are small to 15 meters in rivers. Specifically, compared with a CPU, about 50-times speed-up is enabled even using a single GPU. For the sake of validating this simulator, a simulation of run-up Tsunami in Tone River caused by 2011 Tohoku earthquake is performed. Both of the arriving time of first wave and the wave height fit observation data very well.

    Web of Science

    researchmap

  • THE NUMERICAL SIMULATION OF RUNUP TSUNAMI IN TONE RIVER CAUSED BY THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE

    Ryosuke AKOH, Tadaharu ISHIKAWA

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   68 ( 4 )   I_1543 - I_1548   2012.2

    　More details

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

    DOI： 10.2208/jscejhe.68.i_1543

    researchmap

  • 三角形格子におけるCIP有限体積法を用いた準三次元浅水乱流計算モデルの開発 Reviewed

    赤穗良輔, 石川忠晴

    水工学論文集   55   1207 - 1212   2011.2

    　More details

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

    researchmap

  • A multi-moment finite volume formulation for shallow water equations on unstructured mesh

    Ryosuke Akoh, Satoshi Ii, Feng Xiao

    Journal of Computational Physics   229 ( 12 )   4567 - 4590   2010.6

    　More details

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

    DOI： 10.1016/j.jcp.2010.02.023

    researchmap

  • 非構造格子に基づく浅水流計算モデルの開発と数値実験 Reviewed

    赤穗良輔, 肖鋒

    水工学論文集   54   1153 - 1158   2010.2

    　More details

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

    researchmap

  • A CIP/multi-moment finite volume method for shallow water equations with source terms

    R. Akoh, S. Ii, F. Xiao

    International Journal for Numerical Methods in Fluids   56 ( 12 )   2245 - 2270   2008.4

    　More details

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

    DOI： 10.1002/fld.1616

    researchmap

  • Development of high performance simulator for tsunami Reviewed

    Ryosuke Akoh, Satoshi II, Feng Xiao

    SYSTEMS MODELING AND SIMULATION: THEORY AND APPLICATIONS, ASIA SIMULATION CONFERENCE 2006   29 - +   2007

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：SPRINGER-VERLAG TOKYO  

    Most of the existing numerical models for the simulation of Tsunami are based on the 2D shallow water equations. However, for many situations, it is necessary to use the 3D model in addition to the shallow water models to evaluate the damage in the coast region with a reliable accuracy. So, we propose the multi-scale warning system for Tsunami by coupling the 2D shallow water model and the 3D Navier-Stokes model that solves explicitly the free water surface to cover the physical phenomena that have diverse scales in both time and space. As a part of such a system, we, in this paper, present the essential numerics of the models based on the CIP/MM FVM (CIP/Multi-Moment Finite Volume Method) and some simulation results with the real geographical data for the 2D large-scale cases.

    DOI： 10.1007/978-4-431-49022-7_6

    Web of Science

    researchmap

  • Unified formulation for compressible and incompressible flows by using multi-integrated moments II: Multi-dimensional version for compressible and incompressible flows

    Feng Xiao, Ryosuke Akoh, Satoshi Ii

    Journal of Computational Physics   213 ( 1 )   31 - 56   2006.3

    　More details

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

    DOI： 10.1016/j.jcp.2005.08.002

    CiNii Article

    researchmap

▼display all

MISC

  • A numerical model for shallow water equations on unstructured mesh using CIP/Multi-Moment finite volume formulation

    赤穂良輔, 伊井仁志, XIAO Feng

    日本計算工学会論文集(Web)   2008   2008

    　More details

  • 非構造格子に基づく高性能津波シミュレーターの開発および数値実験

    赤穂良輔, 伊井仁志, XIAO Feng

    計算工学講演会論文集   13 ( 2 )   2008

    　More details

  • CIP/Multi-Moment有限体積法を用いた非構造格子津波シミュレーターの開発

    赤穂良輔, 伊井仁志, XIAO Feng

    数値流体力学シンポジウム講演論文集(CD-ROM)   21st   2007

    　More details

  • 非構造格子に基づく高性能津波シミュレーターの開発

    赤穂良輔, 伊井仁志, XIAO Feng

    計算工学講演会論文集   12 ( 2 )   2007

    　More details

  • Development of multi-scale warning system for Tsunami (2)

    赤穂良輔, 伊井仁志, XIAO Feng

    日本機械学会年次大会講演論文集   2006 ( Vol.1 )   2006

    　More details

  • Development of multi-scale warning system for Tsunami

    赤穂良輔, 伊井仁志, 紫牟田将一, XIAO Feng

    日本機械学会年次大会講演論文集   2005 ( Vol.1 )   2005

    　More details

▼display all

Research Projects

  • 水理観測データが不足する中小河川の氾濫予測と避難経路予測手法の構築

    Grant number：20K05047  2020.04 - 2023.03

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    前野 詩朗, 赤穂 良輔

    　 More details

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

    本研究では，中小河川で流量・水位データが殆ど無い河川に対する，ローカルな地形条件などを考慮できる精度良い被災予測モデルを構築することで，今後の被災防止に向けて河道の弱点箇所の抽出手法を確立し，安全な避難経路を提示するシステムを構築することを目的として実施した．
    最初の課題に対して，具体的には，まず，初年度に構築した高梁川の右支川小田川と3つの支川で発生した洪水を再現出来るモデルを用いて，本年度も継続して簡易に堤防の弱点箇所を抽出するための手法を改良した．その結果，流況に関わる要因から，①越流の有無：解析において越流が発生する．②内外水位差：外水位が堤防高-0.2mを上回ってから1時間の平均内外水位差．但し，1時間以内に内水位が堤防高を上回る場合は，それまでの時間平均内外水位差とする．③堤防形状係数：天端幅B，裏法勾配1:Mとして，B×Mを用いることで越流による堤防決壊を精度良く再現できることが分かった．本手法を小田川とその支川で発生した数箇所の決壊箇所に適用したところ，90％以上の精度で堤防決壊を予測出来たことが分かった．本手法を，平成30年豪雨災害で決壊した百間川の支川砂川と令和2年に発生した球磨川水害の決壊箇所に定期要した結果，何れも結果の有無を予測出来ることが分かった．
    つぎに，平成30年7月豪雨時の降雨量データを用いて，小田川とその支川の末政川，高馬川に囲まれた地域を対象として，浸水ハザードマップに記載されている避難箇所とした場合と，さらに浸水による避難路の浸水を考慮して避難場所を追加した場合の避難時間を検討した．その結果，避難所を追加することで避難時間を軽減できる住家がかなり増えること，また，安全に避難するための避難経路予測を実施した結果，避難開始時刻は，高梁川上流の日羽の水位が氾濫危険水位に達する時刻で避難を開始する必要があったことが示された．

    researchmap

  • Improvement of the float measurement method using quasi-3d flood flow analysis

    Grant number：17K14730  2017.04 - 2021.03

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

    Akoh Ryosuke

    　 More details

    Grant amount：\4290000 （ Direct expense: \3300000 、 Indirect expense：\990000 ）

    In this study, we construct a modified calculation method of river flow rate by using a numerical float model based on quasi-three-dimensional flood flow analysis and DIEX method to estimate velocity distribution in cross section using observed velocity data. From channel experiments and numerical experiments, the basic flowchart of the proposed method was examined and the correction effect was investigated. As a result, about 15% was achieved by the proposed method. Furthermore, as a result of comparing and examining the flood flow analysis and the estimated discharge by the proposed method for the past floods at the Nakahara Bridge Observatory in Asahi River, an improvement of up to about 7% was achieved. The proposed method can be used additionally to the existing method, so it is useful in practical for river management.

    researchmap

  • 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

    　 More details

    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.

    researchmap

  • Development of a practical method for river channel design using a quasi-3D flow simulation and stereo image analysis of aerial photographs

    Grant number：24560618  2012.04 - 2016.03

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

    Ishikawa Tadaharu, AKOH Ryosuke, NAKAMURA Takashi

    　 More details

    Grant amount：\5330000 （ Direct expense: \4100000 、 Indirect expense：\1230000 ）

    The design of the confluence is one of the most difficult aspects of the implementation of a compound channel which is widely adopted in rivers on alluvial plains. In this project, we proposed a practical method of flow analysis for the designing of confluence channels by combining the technique of stereo image analysis of the aerial photographs of flood flow and the quasi-3D shallow water simulation model with unstructured triangular mesh system. The drag force of the tree communities was also taken into consideration based on the results of a field survey.
    The method was applied to the flood flow occurred in the confluence of the Tone River and Watarase River. The stereo image analysis showed the detailed surface flow characteristics. The quasi-3D flow simulation reproduced the surface flow successfully, and revealed the three dimensional flow characteristics under the water surface which are useful for the design of river confluence.

    researchmap

 

Class subject in charge

  • Engineering Mathematics II （2023academic year） 3rd and 4th semester  - 木3～4

  • Differential Equation （2023academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2023academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation 1 （2023academic year） Third semester  - 火3～4

  • Differential Equation 2 （2023academic year） Fourth semester  - 火3～4

  • Advanced Analysis A （2023academic year） 3rd and 4th semester  - 火3～4

  • Data processing and practice C （2023academic year） 1st semester  - 月7～8

  • Data processing and practice C （2023academic year） 1st semester  - その他

  • Seminar in Hydraulic Engineering （2023academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2023academic year） Late  - その他

  • Flood disaster prevention （2023academic year） Prophase  - 月3～4

  • Seminar in Hydraulic Engineering （2023academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2023academic year） Late  - その他

  • Seminar in Design Hydraulic Engineering B （2023academic year） Year-round  - その他

  • Seminar in Design Hydraulic Engineering B （2023academic year） Prophase  - その他

  • Seminar in Design Hydraulic Engineering B （2023academic year） Late  - その他

  • Seminar in Hydraulic Engineering （2023academic year） Prophase  - その他

  • Hydraulic Structural Design （2023academic year） Late  - 月3～4

  • Hydraulic Structural Design （2023academic year） Late  - 月3～4

  • Hydraulics and Exercise （2023academic year） 3rd and 4th semester  - [第３学期]木5～6, [第４学期]木5～8

  • Hydraulics and Exercise A （2023academic year） 3rd and 4th semester  - [第３学期]木5～6, [第４学期]その他

  • Hydraulics and Exercise B （2023academic year） Fourth semester  - 木5～8

  • Hydraulic Experiments （2023academic year） 3rd and 4th semester  - 火5,火7

  • Laboratory Principles in Hydraulics A （2023academic year） 3rd and 4th semester  - 火5,火7

  • Laboratory Principles in Hydraulics B （2023academic year） Summer concentration  - その他

  • Advanced Study （2023academic year） Other  - その他

  • Special Research （2023academic year） Year-round  - その他

  • Environmental engineering mathematics IA （2023academic year） Second semester  - 金1～2

  • Environmental engineering mathematics IB （2023academic year） Fourth semester  - 水5～6

  • Hydraulic Engineering for Disaster Prevention （2023academic year） Late  - その他

  • Hydroscience of Disasters （2023academic year） Late  - その他

  • Engineering Mathematics II （2022academic year） 3rd and 4th semester  - 木3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation （2022academic year） 3rd and 4th semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 1 （2022academic year） Third semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Differential Equation 2 （2022academic year） Fourth semester  - 火3～4

  • Advanced Analysis A （2022academic year） 3rd and 4th semester  - 火3～4

  • Data processing and practice C （2022academic year） 1st semester  - 月7～8

  • Data processing and practice C （2022academic year） 1st semester  - 月7～8

  • Seminar in Hydraulic Engineering （2022academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2022academic year） Late  - その他

  • Seminar in Hydraulic Engineering （2022academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2022academic year） Late  - その他

  • Seminar in Design Hydraulic Engineering B （2022academic year） Prophase  - その他

  • Seminar in Design Hydraulic Engineering B （2022academic year） Late  - その他

  • Hydraulic Structural Design （2022academic year） Late  - 月3～4

  • Hydraulics and Exercise （2022academic year） 3rd and 4th semester  - [第３学期]木5～6, [第４学期]木5～8

  • Hydraulics and Exercise A （2022academic year） 1st semester  - その他

  • Hydraulics and Exercise A （2022academic year） 3rd and 4th semester  - [第３学期]木5～6, [第４学期]その他

  • Hydraulics and Exercise B （2022academic year） Second semester  - その他

  • Hydraulics and Exercise B （2022academic year） Fourth semester  - 木5～8

  • Laboratory Principles in Hydraulics A （2022academic year） 1st semester  - 金3～4

  • Laboratory Principles in Hydraulics B （2022academic year） Third semester  - 水1～2

  • Special Research （2022academic year） Year-round  - その他

  • Environmental engineering mathematics IA （2022academic year） Second semester  - 金1～2

  • Environmental engineering mathematics IA （2022academic year） Fourth semester  - 水5～6

  • Environmental engineering mathematics IB （2022academic year） Second semester  - 金1～2

  • Environmental engineering mathematics IB （2022academic year） Fourth semester  - 水5～6

  • Hydraulic Engineering for Disaster Prevention （2022academic year） Late  - その他

  • Civil Engineering I （2021academic year） 1st semester  - 木2,木3

  • Civil Engineering II （2021academic year） Second semester  - 金3,金4

  • Civil Engineering I （2021academic year） 1st semester  - 木2～3

  • Civil Engineering II （2021academic year） Second semester  - 金3～4

  • Differential Equation （2021academic year） 3rd and 4th semester  - 火3,火4

  • Differential Equation （2021academic year） 3rd and 4th semester  - [第３学期]火3,火4, [第４学期]火3～4

  • Differential Equation （2021academic year） 3rd and 4th semester  - [第３学期]火3,火4, [第４学期]火3～4

  • Differential Equation 1 （2021academic year） Third semester  - 火3,火4

  • Differential Equation 2 （2021academic year） Fourth semester  - 火3,火4

  • Data processing and practice （2021academic year） 1st-4th semester  - [第１学期]月7～8, [第２学期]月7～8, [第３学期]木1～2, [第４学期]木3～4

  • Data processing and practice （2021academic year） Other  - [第３学期]木1～2, [第４学期]木3～4, [第１学期]月7～8

  • Data processing and practice （2021academic year） Other  - [第３学期]木1～2, [第４学期]木3～4, [第１学期]月7～8

  • Data processing and practice C （2021academic year） 1st semester  - 月7～8

  • Data processing and practice C （2021academic year） 1st semester  - 月7～8

  • Seminar on Hydraulic Structural Design （2021academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2021academic year） Late  - その他

  • Seminar on Hydraulic Structural Design （2021academic year） Late  - その他

  • Seminar in Hydraulic Engineering （2021academic year） Prophase  - その他

  • Seminar in Design Hydraulic Engineering （2021academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2021academic year） Late  - その他

  • Seminar in Design Hydraulic Engineering （2021academic year） Late  - その他

  • Seminar in Hydraulic Engineering （2021academic year） Prophase  - その他

  • Hydraulic Structural Design （2021academic year） Late  - 月2～3

  • Hydraulics and Exercise （2021academic year） 1st and 2nd semester  - 水2～4

  • Hydraulics and Exercise A （2021academic year） 1st semester  - 水2～4

  • Hydraulics and Exercise B （2021academic year） Second semester  - 水2～4

  • Laboratory Principles in Hydraulics （2021academic year） 1-3 semesters  - [第１学期]金3～4, [第２学期]その他, [第３学期]木1～2

  • Laboratory Principles in Hydraulics （2021academic year） 1-3 semesters  - [第１学期]金3～4, [第２学期]その他, [第３学期]木1～2

  • Laboratory Principles in Hydraulics A （2021academic year） 1st semester  - 金3～4

  • Laboratory Principles in Hydraulics B （2021academic year） Third semester  - 木1～2

  • Special Research （2021academic year） Year-round  - その他

  • Environmental engineering mathematics I （2021academic year） 3rd and 4th semester  - 月8～9

  • Environmental engineering mathematics IA （2021academic year） Third semester  - 月8～9

  • Environmental engineering mathematics IA （2021academic year） Fourth semester  - 月8～9

  • Environmental engineering mathematics IB （2021academic year） Third semester  - 月8～9

  • Environmental engineering mathematics IB （2021academic year） Fourth semester  - 月8～9

  • Hydraulic Engineering for Disaster Prevention （2021academic year） Late  - その他

  • Civil Engineering I （2020academic year） 1st semester  - 木2,木3

  • Civil Engineering II （2020academic year） Second semester  - 金3,金4

  • Data processing and practice （2020academic year） 1st semester  - 月7,月8

  • Data processing and practice （2020academic year） 1st-4th semester  - [第１学期]月7,月8, [第２学期]木4,木5, [第３学期]木4,木5, [第４学期]木4,木5

  • Data processing and practice C （2020academic year） 1st semester  - 月7,月8

  • Data processing and practice C （2020academic year） 1st semester  - 月7,月8

  • Seminar on Hydraulic Structural Design （2020academic year） Prophase  - その他

  • Seminar in Hydraulic Engineering （2020academic year） Late  - その他

  • Seminar on Hydraulic Structural Design （2020academic year） Late  - その他

  • Seminar in Hydraulic Engineering （2020academic year） Prophase  - その他

  • Hydraulic Structural Design （2020academic year） Late  - 月2,月3

  • Hydraulics and Exercise （2020academic year） 1st and 2nd semester  - 水1,水2,水3

  • Hydraulics and Exercise A （2020academic year） 1st semester  - 水1,水2,水3

  • Hydraulics and Exercise B （2020academic year） Second semester  - 水1,水2,水3

  • Laboratory Principles in Hydraulics （2020academic year） 1-3 semesters  - [第１学期]金7,金8, [第２学期]火2,火3, [第３学期]火2,火3

  • Laboratory Principles in Hydraulics A （2020academic year） 1st semester  - 金7,金8

  • Laboratory Principles in Hydraulics B （2020academic year） Third semester  - 火2,火3

  • Special Research （2020academic year） Year-round  - その他

  • Environmental engineering mathematics I （2020academic year） 3rd and 4th semester  - [第３学期]火4,火5, [第４学期]火7,火8

  • Environmental engineering mathematics IA （2020academic year） Third semester  - 火4,火5

  • Environmental engineering mathematics IA （2020academic year） Fourth semester  - 火7,火8

  • Environmental engineering mathematics IB （2020academic year） Third semester  - 火4,火5

  • Environmental engineering mathematics IB （2020academic year） Fourth semester  - 火7,火8

  • Natural Disaster and Environmental Problem （2020academic year） Fourth semester  - 木1,木2

  • Hydraulic Engineering for Disaster Prevention （2020academic year） Late  - その他

▼display all