Post-tsunami recovery and morphology change at naruse rivermouth, japan

H. T. Nguyen, H. Tanaka, T. X. Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Naruse River mouth was one of many coastal and estuarine areas destructed severely by the 2011 Tohoku Tsunami. Under the intense impact of the tsunami, the sandspit of the Naruse River mouth was forced to disappear leaving the estuarine entrance wide open. Afterwards, almost 7 years after the sorrowful catastrophe, the following recovery of the sandspit was not able to happen due to the insufficiency of sediment supply. This was caused by the blockage of longshore sediment transport that the existing North side T-headland has been creating and the ineffective sediment supply from the river. As the river mouth is wide and clear, waves have no obstacles to approach furtherly upstream and influence inside the river, particularly, the upstream sediment deposit. However, with the desire to regain the sandspit as it was before the tsunami, an artificial sandspit was implemented by utilizing the sediment deposited inside Kitakami canal in early 2018 and has become fairly stable thus far. The morphological change of Naruse River mouth before and after the tsunami is analyzed thoroughly by multiple sources of monitoring photos obtained from 2002-2018. Several quantities of Naruse river mouth are detected in order to reflect detailed recovery process in this area.

Original languageEnglish
Title of host publicationAPAC 2019 - Proceedings of the 10th International Conference on Asian and Pacific Coasts
EditorsNguyen Trung Viet, Tran Thanh Tung, Dou Xiping
PublisherSpringer
Pages797-801
Number of pages5
ISBN (Print)9789811502903
DOIs
Publication statusPublished - 2020
Event10th International Conference on Asian and Pacific Coasts, APAC 2019 - Hanoi, Viet Nam
Duration: 2019 Sep 252019 Sep 28

Publication series

NameAPAC 2019 - Proceedings of the 10th International Conference on Asian and Pacific Coasts

Conference

Conference10th International Conference on Asian and Pacific Coasts, APAC 2019
Country/TerritoryViet Nam
CityHanoi
Period19/9/2519/9/28

Keywords

  • Artificial sandpsit
  • Naruse River mouth
  • Recovery process
  • The 2011 Tohoku Tsunami

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

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