Impacts of waves and sea level rise on ports due to global climate change: Viet Nam sea ports case study

Viet Nam lies in the region of direct impact of sea level rise and climate change, especially in the East Sea where branches of Me Kong river run off. In the annual report on “Climate change and sea level rise in Viet Nam” MONRE has proposed 3 scenarios of sea level rise in the next 100 years viz. 60 cm (low emission scenario), 75 cm (medium emission scenario), 100 cm (high emission scenario). This study is implemented these 3 scenarios on 2 case studies of 2 sea ports: Nam Du deep sea port with researched structure is jetty structure and Tien Sa sea port with researched structure is breakwater. The thesis focuses on the impact of waves and sea level rise on these two types of structures. The objective of this report is to better understanding of how the hydraulic structure(breakwaters and jetties) be impacted by the rising sea level and waves in that SLR condition in the future; answer the question whether the designed structures are stable and functional enough to sustain with SLR. By the results from study, some conceptual recommendations will be proposed to account SLR in the future design. The results of this report shows that jetty structures are not touched by extreme maximum waves in 3 SLR scenarios. The structures themselves are designed included 30 cm of SLR and high enough for water not to transmit to the deck. However, Tien Sa breakwater is unstable if the sea level rises in next 100 years. The structure was not well designed enough to sustain with rising sea level and higher wave conditions. The solution for repairing is ballasting the caisson breakwater to 1m thickness or another proposing conceptual design is enlarging the caisson toe to 6m length to ensure the stability.Hydraulic EngineeringCivil Engineering and Geoscience