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Morphological Characteristics of River Mouths After the 2011 Tohoku Tsunami in Miyagi Prefecture

  • Min RohEmail author
  • Yuta Mitobe
  • Hitoshi Tanaka
Chapter
Part of the Coastal Research Library book series (COASTALRL, volume 14)

Abstract

Coastlines and river mouths along the Tohoku Region in Japan are in the process of steady recovery following the 2011 Tsunami. The affected sandy coastlines and river mouths have undergone more significant changes than the corresponding cliffs, rocky beaches, and hard structures. Analyses of aerial photographs and topographic data related to pre-tsunami and post-tsunami conditions together with the estimated minimum width and positioning changes of river mouths describe how they have changed as well as the differences in their recovery processes. In many cases, there is an indication of stable recovery although the behavioral tendency differs, as in the case of the Natori and Naruse rivers. This study shows that the temporal topographic changes and the relationship with the tidal prism in the mouths of these river mouths differ, resulting in different sediment deposition and restoration processes. Sediment supply is intricately associated with the morphological changes in river mouth morphological changes, which in turn reflect on its recovery. The morphological changes in a river’s mouth present practical river management and maintenance problems in ports and harbors; consequently, continuous monitoring is essential.

Keywords

Tohoku tsunami River morphology recovery Tidal prism 

Notes

Acknowledgments

We sincerely thank Kitakamigawa-Karyu (Downstream region of Kitakami River) River Office in Tohoku Regional Bureau of Ministry of Land, Infrastructure, Transport and Tourism (MLIT) for the valuable topography data and aerial photographs used in this study. We are also grateful for financial support in the form of a Grant-in-Aid for Scientific Research from JSPS (No. 2301367) and the River Environmental Fund (REF) from the Foundation of River and Watershed Environmental Management (FOREM). The first author is a JSPS Postdoctoral Fellow (No. 25-03364).

References

  1. Choowong M, Phantuwongraj S, Charoentitirat T, Chutakositkanon V, Yumuang S, Charusiri P (2009) Beach recovery after 2004 Indian Ocean tsunami from Phangnga, Thailand. Geomorphology 104(3–4):134–142CrossRefGoogle Scholar
  2. Fletcher C, Rooney J, Barbee M, Lim SC, Richmond B (2003) Mapping shoreline change using digital orthophotogrammetry on Maui, Hawaii. J Coast Res 106–124Google Scholar
  3. Ford M (2013) Shoreline changes interpreted from multi-temporal aerial photographs and high resolution satellite images: Wotje Atoll, Marshall Islands. Remote Sens Environ 135:130–140CrossRefGoogle Scholar
  4. Goto K, Takahashi J, Oie T, Imamura F (2011) Remarkable bathymetric change in the nearshore zone by the 2004 Indian Ocean tsunami: Kirinda harbor, Sri Lanka. Geomorphology 127:107–116CrossRefGoogle Scholar
  5. Griffin C, Ellis D, Beavis S, Zoleta-Nantes D (2013) Coastal resources, livelihoods and the 2004 Indian Ocean tsunami in Aceh, Indonesia. Ocean Coast Manag 71:176–186CrossRefGoogle Scholar
  6. Jarrett JT (1976) Tidal prism – inlet area relationships. U. S. Army Coastal Engineering Research Center and U. S. Army Engineers Waterway Experiment Station G.I.T.I. Report 3Google Scholar
  7. Liew SC, Gupta A, Wong PP, Kwoh LK (2010) Recovery from a large tsunami mapped over time: the Aceh coast, Sumatra. Geomorphology 144(4):520–529CrossRefGoogle Scholar
  8. O’Brien MP (1969) Equilibrium flow areas on inlets on sandy coasts. J Waterw Harb Div ASCE 95(WW1):43–52Google Scholar
  9. Pari Y, Ramana Murthy MV, Jaya Kumar S, Subramanian BR, Ramachandran S (2008) Morphological changes at Vellar estuary, India – impact of the December 2004 tsunami. J Environ Manag 89:45–57CrossRefGoogle Scholar
  10. Sugawara D, Takahashi T, Imamura F (2014) Sediment transport due to the 2011 Tohoku-oki tsunami at Sendai: results from numerical modeling. Mar Geol 358:18–37CrossRefGoogle Scholar
  11. Tanaka H, Tinh NX, Umeda M, Hirao R, Pradjoko E, Mano A, Udo K (2012) Coastal and estuarine morphology changes induced by the 2011 Great East Japan Earthquake Tsunami. Coast Eng J 54(1):1250010CrossRefGoogle Scholar
  12. Tanaka H, Adityawan MB, Mano A (2014) Morphological changes at the Nanakita River mouth after the Great East Japan Tsunami of 2011. Coast Eng 86:14–26CrossRefGoogle Scholar
  13. Udo K, Sugawara D, Tanaka H, Imai K, Mano A (2012) Impact of the 2011 Tohoku Earthquake and Tsunami on beach morphology along the northern Sendai Coast. Coast Eng J 54(1):1250009CrossRefGoogle Scholar
  14. Watanabe K, Tanaka H, Tsukiyama T (2003) Morphological change at the Natori River mouth caused by reduction of tidal compartment. Proceedings of XXX IAHR Congress, Theme A 547–553Google Scholar
  15. Wijetunge JJ (2009) Field measurements and numerical simulations of the 2004 tsunami impact on the east coast of Sri Lanka. Pure Appl Geophys 166:593–622CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of Civil EngineeringTohoku UniversitySendaiJapan

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