减轻胡志明市和西贡-东奈河下游流域洪水风险的可能解决方案

IF 0.8 Q4 Environmental Science

Houille Blanche-Revue Internationale De L Eau Pub Date : 2019-12-01 DOI:10.1051/lhb/2019034

Cong San Dinh, Binh Duong Nguyen, Kim Dan Nguyen, V. Nguyen

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引用次数: 1

摘要

西贡洞乃盆地在越南的社会经济发展中发挥着非常重要的作用。胡志明市的面积约为2095 km2，其中60%位于2 高于MSL m。人口约8.136 一百万经济发展导致了与洪水有关的问题。洪水的原因是季风降雨、高潮和HCM市上游Dau Tieng水库的径流。本文通过抬高Dau Tieng坝顶，为HCM市的防洪提供了一个可行的解决方案。可以根据广泛的模拟研究结果推荐该解决方案，该研究使用了：（i）用于评估气候变化的统计缩减程序（CC）对降水的影响；（ii）用于模拟降雨径流过程的海洋模型；（iii）Telemac2D 用于模拟淹没的模型；以及（iv）用于表示不同CC情景下被淹没区域的GIS工具。发现在A2 假设到2050年代降雨量增加，并增加40%的降雨量（假设是由于热带低气压），Dau Tieng大坝的最大调节流量可能达到1650、500和300 m3s−1，不进行任何加固，然后进行1.0和1.5的大坝加固 m、分别。与7月发生的事件相比 2009年21日，由于强降雨和高潮条件的共同影响，内城洪水面积增加了1.2%、1.3%和8.2%，大坝加固了1.5、1.0 m和不进行大坝加固。因此，本研究的结果为做出合理决策提供了关键信息，即在CC和海平面上升的威胁下，提高Dau Tieng大坝坝顶高度以缓解HCM市城市洪水的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A possible solution for flood risk mitigation in Ho Chi Minh City and the lower Sai Gon-Dong Nai River Basin

The Sai Gon-Dong Nai Basin plays a very important role in the socio-economic development of Vietnam. The area of Ho Chi Minh (HCM) City is about 2095 km2, 60% of which lying under 2 m above MSL. Its population is about 8.136 million. Economic development has led to flood-related problems. The causes of floods are monsoon rainfalls, high tides, and outflows from the Dau Tieng Reservoir, upstream of HCM City. This paper proposed a plausible solution for flood mitigation in HCM City by uplifting the Dau Tieng dam crest. This solution can be recommended based on the results of an extensive simulation study which used: (i) a statistical downscaling procedure for evaluating the climate change (CC) impacts on precipitations; (ii) the MARINE model for simulating the rainfall-runoff process; (iii) the Telemac2D model for simulating the inundation; and (iv) the GIS tool for representing the inundated areas under different CC scenarios. It was found that under the A2 scenario an increase of rainfall by 2050s and added 40% of this rainfall (assuming due to tropical depression), the maximum regulated discharges released from the Dau Tieng dam could reach 1650, 500 and 300 m3s−1 without any enhancement then with the dam enhancement of 1.0 and 1.5 m, respectively. As comparing to event occurred on July 21, 2009 due to the combined effect of a heavy rainfall and a high tide condition, the inner city flooding area increases by 1.2, 1.3 and 8.2% with the dam enhancement of 1.5, 1.0 m and without dam enhancement, respectively. Results of this study have therefore provided critical information for making a logical decision concerning the possibility of uplifting the height of the crest of the Dau Tieng dam to mitigate the urban flooding in HCM City under the threat of CC and sea level rise.

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来源期刊

Houille Blanche-Revue Internationale De L Eau 环境科学-水资源

CiteScore

0.40

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： La Houille Blanche, revue internationale de l ''eau/International Water Journal, is the only almost all French-written journal of Water science. It promotes the dissemination of research and innovative practices in the field of water, as a key resource for everyday use for human needs, agriculture, energy and transport, and hydraulic public works. This includes environmental and risk assessment and management issues related to hydrology, meteorology, flood, low flows and drought, as well as issues in the field of fluid mechanics, hydraulics machinery, multiphase flows, microfluidics... La Houille Blanche, International Water Journal, is cited by Science Citation Index Expanded of Institute for Scientific Information (I.S.I) in USA, and by CNRS in France; since 1902, the journal publishes high-standard relevant peer-reviewed research papers. La Houille Blanche also provides more general information and recent news about the water world, and the SHF association and its members life: scientific events, book review, R & D advancements, … Six issues per year. Thematical journal for original articles and reviews mostly in French.