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  • Enhancement of coastal protection under the context of climate change: A case study of Hai Hau coast, Vietnam / Nguyen, MANH HIEU
Sách, tuyển tập

Enhancement of coastal protection under the context of climate change: A case study of Hai Hau coast, Vietnam / Nguyen, MANH HIEU

Tác giả : Nguyen, MANH HIEU

Năm xuất bản : 2015

Mô tả vật lý : 8 p.

Chủ đề : 1. coastal protection. 2. ecological engineering. 3. Erosion coast. 4. geosynthetics. 5. Sea level rise. 6. typhoon. 7. Article.

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Tóm tắt :

Climate change and global warming have led to severe typhoons and sea level rise (SLR) which may threat the stability of coastal structures. However, countermeasures to enhance coastal protection against SLR and severe typhoons have not appropriately considered in Vietnam. This paper focused on the enhancement of coastal protection in Hai Hau district –the most serious erosion coast in the North Vietnam. Erosion in Hai Hau coast has occurred continuously since the beginning of 20th century with average retreat rates of 10-15m/y. The maximum rates reached to 40-50 m/y in some segments. Sea level is considered to rise about 2 mm/y on average in Vietnam. The number and intensity of tropical cyclones have a complicated change with a tendency of much more severe in recent years (2004-2013). Each year the accelerated rate of erosion due to SLR is 0.1-0.3 m/y in the Hai Hau coast. SLR also causes larger wave pressure on the seadikes making them more unstable in typhoons and storm surges. In the projected scenarios of SLR, erosion rates and scouring of dikes trough in Hai Hau coast were predicted to increase sharply in the next few decades. Besides, typhoons induce wave overtopping cause severe erosion of inner slopes of sea dikes and lead to dike broken. Countermeasures to enhance coastal protection of Hai Hau district focus on using local available materials, ecological engineering and geosynthetics measures. As a conclusion of the paper, to cope with future threats induced by climate change, solutions of multiple protections in Hai Hau coast were proposed which include conventional structures (i.e. dike, revetment, groins, mangrove) together with geotubes as submerged breakwaters and vetiver grass.
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https://repository.vnu.edu.vn/handle/VNU_123/13681