Coastal Flooding Impacts Induced Sea Level Rise on Banda Aceh Coastal Morphology

11th Aceh International Workshop and Expo on Sustainable Tsunami Disaster Recovery

Al'Ala, Musa^1 ; Syamsidik^1^2

Tsunami Computation and Visualization Laboratory, Tsunami and Disaster Mitigation Research Center (TDMRC), Syiah Kuala University, Jl. Prof. Ibrahim Hasan, Gampong Pie, Banda Aceh

23233, Indonesia^1

Civil Engineering Department, Syiah Kuala University, Jl. Syeh Abdurrauf, No. 7, Banda Aceh

23111, Indonesia^2

关键词: Banda Aceh;    Coastal defense;    Coastal flooding;    Coastal morphology;    Coastal protection;    Recovery process;    Sea level rise;    Sea-level rise scenarios;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/273/1/012007/pdf
DOI  :  10.1088/1755-1315/273/1/012007

来源: IOP

【 摘 要 】

The research focus is in assessing the impact of sea level rise induced by climate change towards coastal morphology. The process went through numerical modelling combining the flow and swan model generated by Delft3D to mimic morphology process within 100 years in Banda Aceh Coastal Defence. Banda Aceh coastal morphology keeps in recovery process as the coastal line keeps growing after the 2004 devastating morphology destruction until the late 2017. A sea level rise scenario was adopted from IPCC and TOPEX Poseidon with a 7 mm/year increase rate which was recorded between 1992 and 2015. Results recorded Banda Aceh had both sedimented and eroded area. Coastal protection gave the proper protection to Banda Aceh coastal defense while the three of Banda Aceh rivers (Krueng Neng river, Krueng Aceh river, and Floodway) gave sediment supply from the channel. Coastal line retreat between 15 to 100 m was also recorded on the side of Syiah Kuala - Alue Naga beach site, while others had enough sediment supply produced growing shoreline. The predicted regrow coastal area could be utilized as buffer zone as the government had difficulties in relocating the people from the coastal area.