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Reclaiming new land to adapt to sea-level rise in small islands is widespread, but a key question is: How high should new land be reclaimed at and where? The article “Decision-support for land reclamation location and design choices in the Maldives” presents two methods to improve land reclamation decisions in the Maldives.
Often land reclamation practices lack a systematic approach to assess current flood risk and don’t anticipate future sea-level rise impacts. Islands are not reclaimed with enough elevation and/or protection. The consequences can be detrimental.
To address this, we applied a hazard threshold analysis, and a cost-benefit analysis to determine better land reclamation heights in two islands in the Maldives (Ha. Hoarafushi and Gdh. Madaveli).
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Our results demonstrate that generically fixed heights do not produce efficient land reclamation heights. E.g., risk-based heights range from 1.83-1.89m for Ha.Hoarafushi and from 2.74-2.77m for Gdh.Madaveli.
This is important for coastal managers in Small Island Developing States who can improve adaptation decisions, using these two decision-support methods in a complimentary manner.
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