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Title
Japanese:Ocean Tides and the Influence of Sea-Level Rise on Floods in Urban Areas of the Mekong Delta 
English:Ocean Tides and the Influence of Sea-Level Rise on Floods in Urban Areas of the Mekong Delta 
Author
Japanese: Hiroshi Takagi, Ty Van Tran, Thao Danh Nguyen, Miguel Esteban.  
English: Hiroshi Takagi, Ty Van Tran, Thao Danh Nguyen, Miguel Esteban.  
Language English 
Journal/Book name
Japanese:Journal of Flood Risk Management 
English:Journal of Flood Risk Management 
Volume, Number, Page        
Published date Jan. 2014 
Publisher
Japanese:Wiley 
English:Wiley 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://onlinelibrary.wiley.com/doi/10.1111/jfr3.12094/abstract
 
DOI https://doi.org/10.1111/jfr3.12094
Abstract The present paper investigates fluvial flood hazards in urban areas in the Mekong Delta to inundation due to seasonal flooding, a phenomenon which is likely to be exacerbated by future sea-level rise. Unlike past researches which mainly focus on flooding due to river discharge from upstream or heavy precipitation, the present paper scrutinizes the influence of ocean tides. The research reveals that ocean tides predominantly determine water elevation even in an upstream location such as Can Tho City, 80 km inland from the river mouth, and that the river flow causes tidal damping and effectively reduces the energy of the incoming tides. This tidal damping is especially pronounced during the rainy season. Analysis based on the water levels monitored by the Mekong River Commission revealed that the ground near the riverbank of Can Tho had experienced inundation for a total of 215 hours between July 2009 and June 2010 (2.5% of the time over a one year period). Assuming three scenarios of sea-level rise of 20, 40, and 60 cm, all within the range of the IPCC AR4's projections, it was found that the duration of inundation will be prolonged from the present percentage of 2.5 % to 6%, 13%, and 24% of the year, respectively. Furthermore, the field survey carried out by the authors shows that inundation reached up to a height of 47 cm above the roads of Can Tho downtown.

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