Durkin, C. and Seenath, A. and Knaapen, M. (2026) On the impact of closure depth estimation methods on shoreline predictions. Continental Shelf Research, 298.
Full text not available from this repository.Abstract
The depth of closure (DoC) acts as a morphodynamic boundary in hybrid 2D/one-line shoreline models. Although theoretically important, its actual influence on shoreline prediction accuracy in these models, which are increasingly used to inform coastal management, remains uncertain. Moreover, the optimal method for estimating and specifying the DoC in such models is still unresolved. To address this, we use an advanced hybrid 2D/one-line model – MIKE21 – to evaluate the impact of commonly applied DoC estimation equations on short-term (micro timescale) shoreline predictions at two morphologically different sandy coastal systems, one each in New York (NY) and Southern California (SC). We find that shoreline prediction accuracy in NY remains consistent (∼1.0 m MAE; ∼1.2 m RMSE) under alternative DoC estimation methods, while there are marginal differences in SC (∼25–26 m MAE; ∼32–34 m RMSE). These results suggest that the DoC may not be a critical parameter in hybrid 2D/one-line models, contrary to its theoretical importance. We discuss the wider implications of this finding and what it means for continued hybrid 2D/one-line shoreline modelling.
| Item Type: | Article |
|---|---|
| Additional Information: | Open Access |
| Uncontrolled Keywords: | Closure depth; Shoreline models; Coastal management; Uncertainty |
| Subjects: | Coasts > General |
| Divisions: | Coastal Maritime |
| Depositing User: | Helen Stevenson |
| Date Deposited: | 05 Feb 2026 10:09 |
| Last Modified: | 05 Feb 2026 10:09 |
| URI: | http://eprints.hrwallingford.com/id/eprint/1725 |
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