Mechanisms of Rapid Flow caused by Tidal-Fluvial Flow Interaction in Inland Waterways of the Mekong Delta

H. Takagi, T. T. Anh, L. T. Anh, N. D. Thao, T. Takabatake, R. Nakamura

Research output: Contribution to journalConference article

Abstract

The present study investigates the river flow intensifications in the urban areas of the Mekong Delta, which are characterized by tributaries, channels, and low-lying lands in addition to the main stream of the Mekong Delta system. A hydraulic model is used to simulate velocities under the influence of both ocean tide and river discharge. A series of numerical simulations estimate that a rapid flow occurs along the tributary in flood season, reaching up to 1.8 m/s during the 2013 historical flood, which can be reproduced by assigning the net downstream river discharge of 9200 m3/s as well as tidal current. A unique mechanism of flow intensification caused by "tidal blockage", which occurs in the flood tide phase during the flood season, is also identified. Such locally intensified flows could be further strengthened particularly during abnormal high water events such as storm surges and tsunamis, resulting in ship handling difficulties or a risk of overturning small ships.

Original languageEnglish
Article number012001
JournalIOP Conference Series: Earth and Environmental Science
Volume167
Issue number1
DOIs
Publication statusPublished - 2018 Jul 23
Event2018 8th International Conference on Environment Science and Engineering, ICESE 2018 - Barcelona, Spain
Duration: 2018 Mar 112018 Mar 13

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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