Validation of tsunami detection performance of ocean surface radar based on virtual tsunami observation and its application to Tsunami mitigation

• Project/Area Number: 16H04419
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Ehime University
• Principal Investigator: Hinata Hirfofumi 愛媛大学, 理工学研究科(工学系), 教授 (70272680)
• Co-Investigator(Kenkyū-buntansha): 入江 政安 大阪大学, 工学研究科, 准教授 (00379116) ; 高橋 智幸 関西大学, 社会安全学部, 教授 (40261599)
• Research Collaborator: KATAOKA tomoya
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000); Fiscal Year 2018: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000); Fiscal Year 2017: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2016: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
• Keywords: 海洋レーダ / 仮想津波観測実験 / 津波シミュレーション / 電離層 / 波浪 / データ同化 / 津波漂流物 / 津波レーダ / 検知確率 / 漂流計算 / 波峯推定 / 津波 / 津波検知 / 数値シミュレーション / 自然災害 / 水工水理学

Outline of Final Research Achievements

We examined temporal variation of tsunami detection performance of HF radar based on virtual tsunami observation experiments using one-year radar observation data obtained at the west coast of Kii Peninsula and a tsunami simulation for a Mw 9.0 Nankai Trough earthquake. We concluded that the tsunami detection performance on the continental shelf slope depends on ionospheric conditions as well as sea surface state. We also examined how to assimilate tsunami currents observed by HF radars in three dimensional current modeling for the projection of tsunami debris in case the Nankai Trough Megathrust earthquake occurs. In order to assimilate the tsunami component of the surface currents with the consideration of a tsunami’s momentum, high-frequency component is extracted from the observed surface velocities using discrete wavelet transform and assimilated to all vertical layers by nudging. This pragmatic approach better represents both currents and surface elevation.

Academic Significance and Societal Importance of the Research Achievements

津波レーダの測定精度は計測環境の影響を受けるため，津波防災のための実用化には当該海域での津波検知性能の統計的評価が重要である．しかしながら，津波の発生頻度は低く，レーダによる津波の実測例は限られており，津波検知性能の統計的評価はこれまで困難であった．本研究において申請者らは，このデータ不足を仮想津波観測実験という方法により解決し，津波検知性能が波浪や電離層の状態に応じて変化することを明らかにし，さらに，紀伊水道での津波検知性能を統計的に評価することに成功した．近年，国内の原子力発電所に津波レーダが設置され，その津波検知性能が仮想津波観測実験に基づいて評価されるようになった．

Research Products

• [Journal Article] ESTIMATION OF THE WAVE PEAK OF TSUNAMI BY USING A SINGLE OCEANOGRAPHIC RADAR AND ITS APPLICATION (2018)
  • Author(s): SETO Shuji、TAKAHASHI Tomoyuki、HINATA Hirofumi、FUJI Ryotaro、Imamura Fumihiko
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Volume: 74 Issue: 2 Pages: I_511-I_516
  • DOI: 10.2208/kaigan.74.I_511
  • NAID: 130007504050
  • ISSN: 1883-8944, 1884-2399
  • Peer Reviewed / Open Access
• [Journal Article] EVALUATION OF TSUNAMI OBSERVATION PERFORMANCE OF OCEANOGRAHIC RADAR IN ENSHU-NADA - STUDY BY USING VIRTUAL TSUNAMI OBSERVATION EXPERIMENT - (2018)
  • Author(s): TANAKA Yoshihito、UEHARA Fumihiro、HINATA Hirofumi、FUJI Ryotaro
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Volume: 74 Issue: 2 Pages: I_523-I_528
  • DOI: 10.2208/kaigan.74.I_523
  • NAID: 130007504005
  • ISSN: 1883-8944, 1884-2399
  • Peer Reviewed
• [Journal Article] Real-Time Tsunami Detection with Oceanographic Radar Based on Virtual Tsunami Observation Experiments (2018)
  • Author(s): Ogata Kohei、Seto Shuji、Fuji Ryotaro、Takahashi Tomoyuki、Hinata Hirofumi
  • Journal Title: Remote Sensing Volume: 10 Issue: 7 Pages: 1126-1126
  • DOI: 10.3390/rs10071126
  • NAID: 120006524724
  • Peer Reviewed / Open Access
• [Journal Article] Tsunami Waves and Tsunami-Induced Natural Oscillations Determined by HF Radar in Ise Bay, Japan (2018)
  • Author(s): Toguchi Y.、Fujii S.、Hinata H.
  • Journal Title: Journal of Geophysical Research: Oceans Volume: 123 Issue: 4 Pages: 2965-2980
  • DOI: 10.1029/2017jc013626
  • Peer Reviewed
• [Journal Article] Temporal variability of tsunami arrival detection distance based on virtual tsunami observation experiments using HF radar observation and numerical simulation (2017)
  • Author(s): Fuji, R., Hinata, H.
  • Journal Title: Journal of Oceanography Volume: 印刷中 Issue: 6 Pages: 725-741
  • DOI: 10.1007/s10872-017-0428-y
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] DEVELOPMENT OF A REAL-TIME TSUNAMI WAVEFRONT DETECTION TECHNIQUE WITH OCEANOGRAPHIC RADAR BASED ON A VIRTUAL TSUNAMI OBSERVATION EXPERIMENT (2017)
  • Author(s): 尾方 浩平、藤 良太郎、日向 博文
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Volume: 73 Issue: 2 Pages: I_1615-I_1620
  • DOI: 10.2208/kaigan.73.I_1615
  • NAID: 130006171848
  • ISSN: 1883-8944, 1884-2399
  • Peer Reviewed
• [Journal Article] TSUNAMI OBSERVATION CAPABILITIES OF OCEANOGRAPHIC RADAR ON FAR FIELD TSUNAMIS FROM CHILE (2017)
  • Author(s): 岡本 萌、高橋 智幸、日向 博文、藤 良太郎
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Volume: 73 Issue: 2 Pages: I_433-I_438
  • DOI: 10.2208/kaigan.73.I_433
  • NAID: 130006171907
  • ISSN: 1883-8944, 1884-2399
  • Peer Reviewed
• [Journal Article] 紀南分岐流（振り分け潮）の短周期変動に与える海上風影響について (2016)
  • Author(s): 日向博文・陳敏坤・片岡智哉
  • Journal Title: 土木学会論文集B2（海岸工学） Volume: 72 Pages: 436-468
  • NAID: 130005282330
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Tsunami detection technique using by HF radar (2018)
  • Author(s): HINATA Hirofumi
  • Organizer: SENSISTEK-2018
  • Invited
• [Presentation] Tsunami wave-front detection with oceanographic radar based on virtual tsunami observation experiments (2018)
  • Author(s): Kohei Ogata, Ryotaro Fuji and Hirofumi Hinata
  • Organizer: The 4th Ocean Radar Conference for Asia-Pacific
  • Int'l Joint Research
• [Presentation] Verification of Ocean Radar Tsunami Observation of the 2011 Tohoku Tsunami by Numerical Simulation in Ise Bay and Mikawa Bay, Japan (2018)
  • Author(s): Yu Toguchi, Satoshi Fujii and Hirofumi Hinata
  • Organizer: The 4th Ocean Radar Conference for Asia-Pacific
  • Int'l Joint Research
• [Presentation] Examination for moment magnitude of the small tsunami observable by oceanographic radar installed in Wakayama prefecture (2018)
  • Author(s): S. SETO, T. TAKAHASHI, H. HINATA, R. FUJI and F. IMAMURA
  • Organizer: The 15th Annual Meeting for AOGS2018
  • Int'l Joint Research
• [Presentation] 南海トラフ巨大地震津波発生時の紀伊水道周辺海域におけるエネルギーフラックスの時空間変動特性 (2018)
  • Author(s): 吉良郁美, 日向博文, 藤良太郎
  • Organizer: 土木学会四国支部第24回技術研究発表会
• [Presentation] 仮想津波観測実験に基づく海洋レーダによるリアルタイム津波検知性能の検討 (2018)
  • Author(s): 尾方浩平, 藤良太郎, 日向博文
  • Organizer: 土木学会四国支部第24回技術研究発表会
• [Presentation] 海洋レーダを用いた伊勢湾・三河湾における連結副振動の観測 (2017)
  • Author(s): 渡久地 優
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 津波シミュレーョンを用いた海洋レーダによる伊勢湾での津波観測の検証 (2017)
  • Author(s): 渡久地 優
  • Organizer: 海洋レーダを用いた海況監視システムの開発と応用
• [Presentation] Characteristics of Tsunami- Induced Waves and Harbor Oscillations in Ise Bay by Using Oceanographic Radar (2017)
  • Author(s): Yu Toguchi
  • Organizer: International Tsunami Symposium, Bali, 2017
  • Int'l Joint Research
• [Presentation] A Study of Real‐Time Detection Distance of Tsunami Arrival Based on Virtual Tsunami Observation Experiments using Numerical Simulation and HF Radar Observation (2017)
  • Author(s): Hirofumi Hinata
  • Organizer: International Radiowave Oceanography Workshop
  • Int'l Joint Research
• [Presentation] Temporal Variability of Tsunami Arrival Detection Distance Revealed by Virtual Tsunami Observation Experiments using Numerical Simulation and One‐Month HF Radar Observation (2017)
  • Author(s): Ryotaro Fuji
  • Organizer: International Radiowave Oceanography Workshop
  • Int'l Joint Research
• [Presentation] A study of real-time detection distance of tsunami arrival based on virtual tsunami observation experiments using numerical simulation and HF radar observation (2017)
  • Author(s): Ryotaro Fuji
  • Organizer: International Tsunami Symposium, Bali, 2017
  • Int'l Joint Research
• [Presentation] Temporal variability of tsunami arrival detection distance revealed by virtual tsunami observation experiments using numerical simulation and one-month HF radar observation (2017)
  • Author(s): Hirofumi Hinata
  • Organizer: International Tsunami Symposium, Bali, 2017
  • Int'l Joint Research
• [Presentation] Temporal variability of tsunami detection distance revealed by virtual tsunami observation experiments using HF radar (2017)
  • Author(s): Ryotaro Fuji
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 仮想津波観測実験に基づく海洋レーダによるリアルタイム津波検知手法の開発 (2017)
  • Author(s): 尾形浩平
  • Organizer: 土木学会四国支部第23回技術研究発表会
• [Remarks] 日向研究室
  • URL: http://www.cee.ehime-u.ac.jp/~kaigan/