Impact of gate operating modes of sea dikes on hydrodynamic regime and inundated area in Can Gio Bay

Impact of gate operating modes of sea dikes on hydrodynamic regime and inundated area in Can Gio Bay
复制标题

海堤闸门运行模式对芹焦湾水动力状况和淹没面积的影响

DOI:
10.1080/21664250.2019.1579460
复制
发表时间:
2019
影响因子:
2.4
通讯作者:
Trieu Anh Ngoc and Masayoshi Harada
Trieu Anh Ngoc and Masayoshi Harada
中科院分区:
工程技术3区
文献类型:
--
作者:
Vu Thi Hoai Thu;Toshinori Tabata;Kazuaki Hiramatsu;Trieu Anh Ngoc and Masayoshi Harada

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由于快速城市化和海平面变化的共同影响,上游洪水以及不断上涨的大潮和降雨共同作用,胡志明市被严重淹没。为了调节胡志明市排水和下水道系统的蓄水和控制水位,已经提出了关闭金吉奥湾的海堤。然而,拟建的海堤和不同的闸门运行方式可能会显著改变干吉奥湾的水动力状况。在这项研究中,建立了一个二维水动力模型,以评估海堤修建后的水动力状况的变化,包括干吉奥湾红树林淹没区域的波动。结果表明,海堤建设是控制水位、减少淹没的有效解决方案,特别是考虑到2050年海平面上升的情景。此外,闸门运行方式对减洪效果也有影响,比没有闸门运行的同类型海堤好10%左右。然而,在2100年海平面上升的情况下,海堤在所有情况下都不那么有效。
Ho Chi Minh City gets severely inundated by upstream flooding and a combination of rising spring tides and rain, owing to the combined impacts of rapid urbanization and sea level changes. A sea dike to close Can Gio Bay has been proposed to regulate storage and control water levels in the drainage and sewer system of Ho Chi Minh City. However, this proposed sea dike and different gate operating modes could significantly change the hydrodynamic regime in Can Gio Bay. In this study, a two-dimensional hydrodynamic model was developed to assess changes in the hydrodynamic regime after construction of the sea dike, including fluctuations in the inundated areas in Can Gio Bay mangrove forests. The results show that sea dike construction is an effective solution for controlling water levels and reducing inundation, especially considering a sea level rise scenario in the year 2050. Further, the gate operation mode also affects the effectiveness of inundation reduction, which is approximately 10% better than the same sea dike type without gate operation. However, the sea dike was less effective in a sea water level rise scenario in 2100 for all scenarios.
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