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Coastal Modelling Environment version 1.0:: a framework for integrating landform specifc component models in order to simulate decadal to centennial morphological changes on complex coasts

Coastal Modelling Environment version 1.0:: a framework for integrating landform specifc component models in order to simulate decadal to centennial morphological changes on complex coasts
Coastal Modelling Environment version 1.0:: a framework for integrating landform specifc component models in order to simulate decadal to centennial morphological changes on complex coasts
The ability to model morphological changes on complex, multi-landform, coasts during decadal to centennial time scales is essential for sustainable coastal management world-wide. One approach involves coupling of landform-specific 15 simulation models (e.g. cliffs, beaches, dunes, estuaries, etc.) that have been independently developed. An alternative, novel, approach explored in this paper is to capture the essential characteristics of the landform-specific models using a common spatial representation within an appropriate software framework. This avoid the problems that result from the model-coupling approach due to between-model differences in the conceptualisations of geometries, volumes and locations of sediment. In the proposed framework, the Coastal Modelling Environment (CoastalME), change in coastal morphology is 20 represented by means of dynamically linked raster and geometrical objects. A grid of raster cells provides the data structure for representing quasi-3D spatial heterogeneity and sediment conservation. Other geometrical objects (lines, areas and volumes) that are consistent with, and derived from, the raster structure represent a library of coastal elements (e.g. shoreline, beach profiles and estuary volumes) as required by different landform-specific models. As a proof-of-concept, we illustrate the capabilities of an initial version of CoastalME by integrating a cliff-beach model and two wave propagation 25 approaches. We verify that CoastalME can reproduce behaviours of the component landform-specific models. Additionally, the integration of these component models within the CoastalME framework reveals behaviours that emerge from the interaction of landforms, which have not previously been captured, such as the influence of the regional bathymetry on the local alongshore sediment transport gradient, the effect on coastal change on an undefended coastal segment and on sediment bypassing of coastal structures.
Coastal modelling, morphological changes, decadal, coastal management, CoastalME,
1991-9603
2715-2740
Payo Garcia, Andres
ea965604-5d0d-472e-a8cd-25de95d111ff
Favis-Mortlock, David
059109b9-da70-437b-b38e-3f2f1aec929a
Dickson, Mark
d071840d-483c-43de-9868-b5cd3032ee16
Hall, Jim
d4f5ac85-4282-447a-ba4d-ae6715f64a94
Hurst, Martin
496788e2-f237-425d-bbc5-1ab559a7c2c4
Walkden, Mike
d7345cae-84a5-4f93-b952-489f573ec124
Townend, Ian
f72e5186-cae8-41fd-8712-d5746f78328e
Ives, Matthew
2ec7e27c-4b22-4bd7-9334-873d02c20623
Nicholls, Robert
4ce1e355-cc5d-4702-8124-820932c57076
Ellis, Michael A
c8b8bfe7-48a0-4acf-abc3-94c7f19738e9
Payo Garcia, Andres
ea965604-5d0d-472e-a8cd-25de95d111ff
Favis-Mortlock, David
059109b9-da70-437b-b38e-3f2f1aec929a
Dickson, Mark
d071840d-483c-43de-9868-b5cd3032ee16
Hall, Jim
d4f5ac85-4282-447a-ba4d-ae6715f64a94
Hurst, Martin
496788e2-f237-425d-bbc5-1ab559a7c2c4
Walkden, Mike
d7345cae-84a5-4f93-b952-489f573ec124
Townend, Ian
f72e5186-cae8-41fd-8712-d5746f78328e
Ives, Matthew
2ec7e27c-4b22-4bd7-9334-873d02c20623
Nicholls, Robert
4ce1e355-cc5d-4702-8124-820932c57076
Ellis, Michael A
c8b8bfe7-48a0-4acf-abc3-94c7f19738e9

Payo Garcia, Andres, Favis-Mortlock, David, Dickson, Mark, Hall, Jim, Hurst, Martin, Walkden, Mike, Townend, Ian, Ives, Matthew, Nicholls, Robert and Ellis, Michael A (2017) Coastal Modelling Environment version 1.0:: a framework for integrating landform specifc component models in order to simulate decadal to centennial morphological changes on complex coasts. Geoscientific Model Development, 10 (7), 2715-2740. (doi:10.5194/gmd-10-2715-2017).

Record type: Article

Abstract

The ability to model morphological changes on complex, multi-landform, coasts during decadal to centennial time scales is essential for sustainable coastal management world-wide. One approach involves coupling of landform-specific 15 simulation models (e.g. cliffs, beaches, dunes, estuaries, etc.) that have been independently developed. An alternative, novel, approach explored in this paper is to capture the essential characteristics of the landform-specific models using a common spatial representation within an appropriate software framework. This avoid the problems that result from the model-coupling approach due to between-model differences in the conceptualisations of geometries, volumes and locations of sediment. In the proposed framework, the Coastal Modelling Environment (CoastalME), change in coastal morphology is 20 represented by means of dynamically linked raster and geometrical objects. A grid of raster cells provides the data structure for representing quasi-3D spatial heterogeneity and sediment conservation. Other geometrical objects (lines, areas and volumes) that are consistent with, and derived from, the raster structure represent a library of coastal elements (e.g. shoreline, beach profiles and estuary volumes) as required by different landform-specific models. As a proof-of-concept, we illustrate the capabilities of an initial version of CoastalME by integrating a cliff-beach model and two wave propagation 25 approaches. We verify that CoastalME can reproduce behaviours of the component landform-specific models. Additionally, the integration of these component models within the CoastalME framework reveals behaviours that emerge from the interaction of landforms, which have not previously been captured, such as the influence of the regional bathymetry on the local alongshore sediment transport gradient, the effect on coastal change on an undefended coastal segment and on sediment bypassing of coastal structures.

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More information

Accepted/In Press date: 14 June 2017
e-pub ahead of print date: 17 July 2017
Published date: 17 July 2017
Keywords: Coastal modelling, morphological changes, decadal, coastal management, CoastalME,
Organisations: Energy & Climate Change Group, Civil Maritime & Env. Eng & Sci Unit, Southampton Marine & Maritime Institute

Identifiers

Local EPrints ID: 411825
URI: http://eprints.soton.ac.uk/id/eprint/411825
ISSN: 1991-9603
PURE UUID: 885b4b0d-d04e-4453-82ca-b0f8e5fa9bb4
ORCID for Ian Townend: ORCID iD orcid.org/0000-0003-2101-3858
ORCID for Robert Nicholls: ORCID iD orcid.org/0000-0002-9715-1109

Catalogue record

Date deposited: 27 Jun 2017 16:31
Last modified: 18 Feb 2021 17:02

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Contributors

Author: Andres Payo Garcia
Author: David Favis-Mortlock
Author: Mark Dickson
Author: Jim Hall
Author: Martin Hurst
Author: Mike Walkden
Author: Ian Townend ORCID iD
Author: Matthew Ives
Author: Robert Nicholls ORCID iD
Author: Michael A Ellis

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