Geological survey for the recurrence interval of the tsunami in the Indian Ocean at Sri Lanka

• Project/Area Number: 20403002
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Natural disaster science
• Research Institution: Osaka City University
• Principal Investigator: HARAGUCHI Tsuyoshi Osaka City University, 大学院・理学研究科, 准教授 (70372852)
• Co-Investigator(Kenkyū-buntansha): YOKOYAMA Yusuke 東京大学, 海洋研究所, 准教授 (10359648) ; GOTO Kazuhisa 千葉工業大学, 惑星探査研究センター, 上席研究員 (10376543)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000); Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2009: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2008: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
• Keywords: インド洋大津波 / スリランカ / 巨大津波 / 再来間隔 / 津波リスク / 津波堆積物 / 津波 / 災害 / 海洋科学 / 年代分析

Research Abstract

We took drilling core samples at some locations from southwest to east coasts of Sri Lanka to estimate the recurrence interval of large tsunamis in the Indian Ocean. Possible tsunami sand layers intercalated in the peat layer in each core. Our study revealed that the possible tsunami layers were deposited every 600-1000 years interval in the 7000 years sedimentary record. The distribution of the tsunami deposits can be explained by the numerical modeling results.

Research Products

• [Journal Article] Remarkablebathymetric change in the nearshore zone by the 2004 Indian Ocean tsunami : Kirinda Harbor, Sri Lanka. (2011)
  • Author(s): Goto, K., Takahashi, J., Oie, T., Imamura, F.
  • Journal Title: Geomorphology Vol.127 Pages: 107-116
  • Peer Reviewed
• [Journal Article] Remarkable bathymetric change in the nearshore zone by the 2004 Indian Ocean tsunami : Kirinda Harbor, Sri Lanka. (2011)
  • Author(s): Goto, K., Takahashi, J., Oie, T., Imamura, F.
  • Journal Title: Geomorphology Volume: Vol.127 Pages: 107-116
  • Peer Reviewed
• [Journal Article] Developing ultra small-scale radiocarbon sample measurement at the University of Tokyo. (2010)
  • Author(s): Yokoyama, Y., M. Koizumi, H. Matsuzaki, Y. Miyairi, N. Ohkouchi
  • Journal Title: Radiocarbon 52 Pages: 310-318
  • Peer Reviewed
• [Journal Article] The sea-level conundrum : case studies from palaeo-archives. (2010)
  • Author(s): PALSEA (PALeo SEA level working group)
  • Journal Title: Journal of Quaternary Science 25 Pages: 19-25
  • Peer Reviewed
• [Journal Article] Historic 1771 Meiwa tsunami confirmed by high-resolution U/Th dating of massive Porites coral boulders at Ishigaki Island in Ryukyus (2010)
  • Author(s): Araoka, D, M. Inoue, A. Suzuki, Y. Yokoyama, R.L. Edwards, H. Cheng, H. Matsuzaki, H. Kan, N. Shikazono, H. Kawahata
  • Journal Title: Japan. 11
  • Peer Reviewed
• [Presentation] Paleotsunami records in Sri Lanka (2010)
  • Author(s): Haraguchi
  • Organizer: Workshop on Practical Community Countermeasure for Earthquake and Tsunami Disaster Reduction
  • Place of Presentation: スリランカ、コロンボ
  • Year and Date: 2010-03-16
• [Presentation] 津波による浅海域での土砂移動現象-スリランカ・キリンダ漁港の例- (2009)
  • Author(s): 後藤和久, 高橋潤, 大家隆行, 今村文彦
  • Organizer: 第七回日本堆積学会
  • Place of Presentation: 大阪
  • Year and Date: 2009-03-28
• [Presentation] A Sedimentary Record of the Tsunami Recurrence in Sri Lanka. (2009)
  • Author(s): Goto K., Haraguchi, T., Ratnayake, N.P., Amarasingha, A.V.P., Yokoyama, Y., Tsujimoto, A., Yoshinaga, Y., Takahashi J., Imamura I.
  • Organizer: International symposium on : Estimating the Recurrence interval and behavior of tsunamis in the Indian Ocean via a Survey of Tsunami related Sedimentation.
  • Place of Presentation: つくば
  • Year and Date: 2009-03-19
• [Presentation] Sedimentary records and the environmental impacts of the 2004 Indian Ocean tsunami at Sri Lanka. (2009)
  • Author(s): Ratnayake, N.P., Vijitha, A.V.P., Goto K., Haraguchi, T.
  • Organizer: Symposium : for Estimating the Recurrence Interval and Behavior of Tsunamis in the Indian Ocean via a Survey of Tsunami-related Sedimentation.
  • Place of Presentation: つくば
  • Year and Date: 2009-03-19
• [Presentation] The overview of the joint research project for the paleo-tsunami deposits in Sri Lanka. (2009)
  • Author(s): Vijitha, A.V.P., Ratnayake, N.P., Goto K., Haraguchi, T.
  • Organizer: Symposium : for Estimating the Recurrence Interval and Behavior of Tsunamis in the Indian Ocean via a Survey of Tsunami-related Sedimentation.
  • Place of Presentation: つくば
  • Year and Date: 2009-03-19
• [Presentation] スリランカ・キリンダ漁港を対象とした2004年インド洋大津波による土砂移動過程の解析 (2008)
  • Author(s): 高橋潤, 後藤和久, 大家隆行, 柳澤英明, 今村文彦
  • Organizer: 海岸工学講演会
  • Place of Presentation: 富山
  • Year and Date: 2008-11-14
• [Book] 古生物学事典第2版 分担執筆:"年代測定" (2010)
  • Author(s): 横山祐典
  • Publisher: 朝倉書店
• [Book] 古生物学事典第2版 分担執筆:"放射性炭素年代値" (2010)
  • Author(s): 横山祐典
  • Total Pages: 462
  • Publisher: 朝倉書店