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The development of a tool for examining the morphological evolution of managed realignment sites
Spearman, J. (2011). The development of a tool for examining the morphological evolution of managed realignment sites, in: Le Hir, P. et al. (Ed.) Proceedings of the 9th International Conference on Nearshore and Estuarine Cohesive Sediment Transport Processes (INTERCOH '07), Brest, France, September 25-28, 2007. Continental Shelf Research, 31(10, Suppl.): pp. S199-S210. https://hdl.handle.net/10.1016/j.csr.2010.12.003
In: Le Hir, P. et al. (Ed.) (2011). Proceedings of the 9th International Conference on Nearshore and Estuarine Cohesive Sediment Transport Processes (INTERCOH '07), Brest, France, September 25-28, 2007. Continental Shelf Research, 31(10, Suppl.). Elsevier: Amsterdam. 210 pp.
In: Continental Shelf Research. Pergamon Press: Oxford; New York. ISSN 0278-4343; e-ISSN 1873-6955, meer
Peer reviewed article  

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Documenttype: Congresbijdrage

Author keywords
    Modelling; Saltmarshes; Managed realignment; Sea level rise; Environmentmanagement; Coastal morphology

Auteur  Top 
  • Spearman, J.

Abstract
    This paper describes the development of a model for prediction of local changes in morphodynamics resulting from managed realignment, undertaken as part of a UK project funded by Defra. The methodology builds on the conceptual modelling approach to habitat development employed successfully by Di Silvio (1989, 1998), Di Silvio and Gambolati (1990) and others for lagoon environments. The overall approach can be described as hybrid - combining bottom-up (process-based) and top-down (simplified and/or empirical) predictive techniques - to describe the essential inlet functioning. The model described in this paper is used to predict the evolution of a managed realignment site under the action of tides and waves and sediment supply. Validation of the managed realignment model is undertaken using the available survey data from before the realignment and from several years afterwards. The performance of the model is promising in this respect, producing the right magnitude and the main qualitative features of bathymetric change. Longer simulations are used to see how the growth of saltmarsh itself affects the evolution of the setback field and how sea level rise would affect the development of saltmarsh.

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