TY - JOUR
T1 - Mechanisms of Rapid Flow caused by Tidal-Fluvial Flow Interaction in Inland Waterways of the Mekong Delta
AU - Takagi, H.
AU - Anh, T. T.
AU - Anh, L. T.
AU - Thao, N. D.
AU - Takabatake, T.
AU - Nakamura, R.
N1 - Funding Information:
This research was funded by the JSPS KAKENHI Grant Number 26702009 and 16KK0121 (Japan Society for the Promotion of Science).
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/7/23
Y1 - 2018/7/23
N2 - 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.
AB - 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.
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U2 - 10.1088/1755-1315/167/1/012001
DO - 10.1088/1755-1315/167/1/012001
M3 - Conference article
AN - SCOPUS:85051346590
SN - 1755-1307
VL - 167
JO - IOP Conference Series: Earth and Environmental Science
JF - IOP Conference Series: Earth and Environmental Science
IS - 1
M1 - 012001
T2 - 2018 8th International Conference on Environment Science and Engineering, ICESE 2018
Y2 - 11 March 2018 through 13 March 2018
ER -