Ocean tides and the influence of sea-level rise on floods in urban areas of the Mekong Delta

H. Takagi, T. V. Ty, N. D. Thao, Miguel Esteban

Research output: Contribution to journalArticle

17 Citations (Scopus)

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 scrutinises 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 h between July 2009 and June 2010 (2.5% of the time over a 1-year period). Assuming three scenarios of sea-level rise of 20, 40, and 60cm, all within the range of the Intergovernmental Panel on Climate Change (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.

Original languageEnglish
Pages (from-to)292-300
Number of pages9
JournalJournal of Flood Risk Management
Volume8
Issue number4
DOIs
Publication statusPublished - 2015 Dec 1
Externally publishedYes

Fingerprint

ocean tide
Sea level
Tides
damping
natural disaster
urban area
flooding
Rivers
river
Intergovernmental Panel on Climate Change
Damping
river discharge
river flow
field survey
tide
water level
hazard
Water levels
road
Climate change

Keywords

  • Climate change
  • Lowlands
  • Risk assessment
  • River

ASJC Scopus subject areas

  • Environmental Engineering
  • Geography, Planning and Development
  • Safety, Risk, Reliability and Quality
  • Water Science and Technology

Cite this

Ocean tides and the influence of sea-level rise on floods in urban areas of the Mekong Delta. / Takagi, H.; Ty, T. V.; Thao, N. D.; Esteban, Miguel.

In: Journal of Flood Risk Management, Vol. 8, No. 4, 01.12.2015, p. 292-300.

Research output: Contribution to journalArticle

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