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Brown, Sally, Wadey, Matthew P., Nicholls, Robert J. 
ORCID: https://orcid.org/0000-0002-9715-1109, Shareef, Ali, Khaleel, Zammath, Hinkel, Jochen, Lincke, Daniel and McCabe, Maurice 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).
ISSN 1753-318X
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 |
|---|---|
| Uncontrolled Keywords: | adaptation,defence,flooding,island,land claim,sea-level rise,environmental engineering,geography, planning and development,safety, risk, reliability and quality,water science and technology ,/dk/atira/pure/subjectarea/asjc/2300/2305 |
| Faculty \ School: | University of East Anglia Research Groups/Centres > Theme - ClimateUEA |
| UEA Research Groups: | University of East Anglia Schools > Faculty of Science > Tyndall Centre for Climate Change Research Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research Faculty of Science > Research Groups > Collaborative Centre for Sustainable Use of the Seas |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 04 Dec 2019 02:14 |
| Last Modified: | 22 Oct 2022 05:32 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/73251 |
| DOI: | 10.1111/jfr3.12567 |
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