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Sustainability 2016, 8(9), 959; doi:10.3390/su8090959

Sea-Level Rise and Land Subsidence: Impacts on Flood Projections for the Mekong Delta’s Largest City

1
Tokyo Institute of Technology, School of Environment and Society, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
2
Faculty of Civil Engineering, Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet St., Dist.10, Ho Chi Minh City 700000, Vietnam
*
Author to whom correspondence should be addressed.
Academic Editor: Tan Yigitcanlar
Received: 21 June 2016 / Revised: 10 September 2016 / Accepted: 12 September 2016 / Published: 21 September 2016
(This article belongs to the Section Sustainable Urban and Rural Development)
View Full-Text   |   Download PDF [12265 KB, uploaded 21 September 2016]   |  

Abstract

The present paper demonstrates that inundation levels in the Mekong Delta’s largest city, Can Tho, are predominantly determined by ocean tides, sea-level rise, and land subsidence. Our analysis of inundation patterns projects that the duration of inundation at an important road in the city will continue to rise from the current total of 72 inundated days per year to 270 days by 2030 and 365 days by 2050. This is attributed to the combined influence of sea-level rise and land subsidence, which causes relative water level rises at a rate of 22.3 mm·yr−1. People in the Mekong Delta have traditionally lived with floods, and thus there is certain resilience among residents in coping with small floods. At present, daily maximum inundation depth, which is generally shallower than 10 cm on the road, seems to be still manageable; however, our analysis indicates that this will start drastically increasing in the coming decades and reach an average depth of 70 cm by 2050. Effective and well-planned actions to mitigate the effects of land subsidence and sea-level rise are urgently required, otherwise, local inhabitants will encounter an unmanageable increase in inundation depth and duration in the coming decades. This study, which considers both sea-level rise and land subsidence, suggests that inundation depth and duration are projected to rise much faster than those indicated by previous studies, which only consider sea-level rise. View Full-Text
Keywords: sea-level rise (SLR); land subsidence; Mekong Delta; flood; tide; river discharge sea-level rise (SLR); land subsidence; Mekong Delta; flood; tide; river discharge
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Takagi, H.; Thao, N.D.; Anh, L.T. Sea-Level Rise and Land Subsidence: Impacts on Flood Projections for the Mekong Delta’s Largest City. Sustainability 2016, 8, 959.

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