Brown, S., Wadey, M. P., Nicholls, R. J., Shareef, A., Khaleel, Z., Hinkel, J., Lincke, D. and McCabe, M. V., 2020. Land raising as a solution to sea-level rise: An analysis of coastal flooding on an artificial island in the Maldives. Journal of flood risk management, 13 (S1), e12567.
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DOI: 10.1111/jfr3.12567
Abstract
The Maldives (land elevation approximately 1m above mean sea-level) is often associated with the threat of rising sea-levels. Land scarcity due to population pressure is also a major issue. In the late 1990s a new 1.9km^2 2m high artificial island, Hulhumalé was created for urban expansion, including an allowance for sea-level rise. This paper assesses flood exposure through an extreme water level scenario on Hulhumalé taking into account sea-level rise and analyses potential adaptation options to extend island life. Results indicate that overtopping is likely to occur with 0.6±0.2m of SLR, with more severe, widespread flooding with 0.9±0.2m of sea-level rise. If the Paris Agreement goals are met, flooding is not anticipated this century, but under a non-mitigation scenario, flooding could occur by the 2090s. Building seawalls 0.5m, 1.0m and 1.5m high could delay flooding for 0.2m, 0.4m and 0.6m of sea-level rise, respectively. Land raising has been successful in Hulhumalé in reducing flood risk simultaneous to addressing development needs. Whilst new land claim and raising can be cost-effective, raising developed land provides greater challenges, such as timeliness with respect to infrastructure design lives or financial costs. Thus the transferability and long-term benefits of land raising requires further consideration.
Item Type: | Article |
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ISSN: | 1753-318X |
Additional Information: | Seventh Framework Programme, Grant/Award Numbers: IMPACT2C: Quantifying projected impacts under 2�, RISES-AM-Contract ENV-2013-two-stage-603396;European Union Seventh Framework Programme, Grant/Award Number: FP7 |
Uncontrolled Keywords: | sea-level rise; adaptation; flooding; island; defence; land claim |
Group: | Faculty of Science & Technology |
ID Code: | 32671 |
Deposited By: | Symplectic RT2 |
Deposited On: | 27 Aug 2019 14:48 |
Last Modified: | 14 Mar 2022 14:17 |
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