Urban shoreline amplification of storm surge during extreme tropical cyclones: Current and future flood risks
Project/Area Number |
20K15003
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 25030:Disaster prevention engineering-related
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Research Institution | Tokyo Institute of Technology (2022) Kyoto University (2020-2021) |
Principal Investigator |
ウェッブ エイドリアン 東京工業大学, 理学院, 特任准教授 (00752172)
|
Project Period (FY) |
2020-04-01 – 2024-03-31
|
Project Status |
Granted (Fiscal Year 2022)
|
Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
Keywords | storm surge / coastal flooding / tropical cyclones / meshless model / climate dataset |
Outline of Research at the Start |
高潮や高波の対策は、人命や資産を保護する上で重要である。特に、我が国では都市や資産が沿岸域に集中しており、これらのリスクを正確に把握し、リスクの大きさに応じた防護施設を構築することが期待されている。しかし、複雑な形状を持つ都市の沿岸港湾域では、高潮が局所的に増幅されるが、発生メカニズムや発生場所については明らかでない。本研究では、現在気候と将来気候の高潮リスクを詳細に推定するとともに高潮を増幅する沿岸域特性・地形特性を解明することを目的とする。超高解像度の高潮モデルを開発し、国内・国外の沿岸都市を対象に気候変動の影響を考慮した大規模なシミュレーションを行い、リスクを推定する。
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Outline of Annual Research Achievements |
Complex urban shorelines can amplify storm surge from extreme tropical cyclones in ways that are different from natural coasts. The purpose of this research is to identify main properties that amplify storm surge and better understand present and future flood risks that urban coastal communities face. A high-resolution storm surge model is being developed and coupled with a large-ensemble climate dataset in order to quantify changes in urban flood risk. This research is being conducted in two main phases: modeling and simulation.
Work on Phase 1 (model development) continued in FY2022 with the assistance of two international experts. A prototype with a spatially-flexible finite difference numerical scheme was used to investigate the role bathymetry plays in urban storm surge amplification in Osaka Bay. Parallel work on Phase 2 (ensemble simulation) continued in FY2022. A dataset generated in FY2021 was used to analyze changes in extreme tropical cyclone events and how they might affect coastal flooding in the target areas.
Research results from this project were presented at both domestic and international venues. An international conference session was organized in Japan in early FY2022 to facilitate discussion on the research topic and to encourage international collaboration. The conference included domestic and international speakers, both early-career and established. In addition, results of Phase 2 were presented at the Institute for Mathematical and Statistical Innovation (USA) during a three-month workshop, and at Argonne National Laboratory in Chicago (USA).
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Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
COVID-19 travel restrictions in FY2022 prevented two international collaborators from visiting Japan during the summer of 2022. This hindered collaboration some and model development progressed slower than was anticipated during FY2022. However, a new collaboration with another international expert that began in FY2022 is helping speed up planned simulations in FY2023.
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Strategy for Future Research Activity |
The new tropical cyclone track dataset (that was generated in FY2021) will be used to simulate thousands of flood events under present and future climate conditions to test hypotheses and and generalize results.
We are currently making plans to host 1-3 international collaborators during FY2023. Part of this visit will be used to help write up the results for publication.
And finally, research progress will continue to be presented at domestic and international conferences. As such, another domestic conference session is being organized in early FY2024 to facilitate discussion and collaboration in Japan around storm surge and coastal-related hazards.
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Report
(3 results)
Research Products
(20 results)