Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
doi:10.5194/gmd-2016-264
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Model description paper
15 Nov 2016
Review status
This discussion paper is under review for the journal Geoscientific Model Development (GMD).
CoastalME version 1.0: a Coastal Modelling Environment for simulating decadal to centennial morphological changes
Andrés Payo1,2,a, David Favis-Mortlock1, Mark Dickson3, Jim W. Hall1, Martin Hurst4,b, Mike J. A. Walkden5, Ian Townend6, Matthew C. Ives1, Robert J. Nicholls2, and Michael A. Ellis4 1Oxford University Centre for the Environment, South Parks Road, Oxford, OX1 3QY, UK
2Faculty of Eng. & the Env. Energy and Climate Change, Southampton University, Southampton, SO17 1BJ, UK
3School of Env. University of Auckland, 10 Symonds St, Auckland Private Bag 92019, NZ
4British Geological Survey, Keyworth, NG12 5GD, UK
5WSP|Parsons Brinckerhoff, Keble House, Southernhay Gardens, Exeter EX1 1NT, UK
6National Oceanography Centre, Southampton University, SO14 3ZH UK
acurrent address: British Geological Survey, Keyworth, NG12 5GD, UK
bcurrent address: University of Glasgow, East Quad, Glasgow, G12 8QQ, UK
Abstract. Modelling coastal morphological changes at decadal to centennial time scales is required to support sustainable coastal management world-wide. One approach involves coupling of landform-specific components (e.g. cliff, beach, dunes, estuaries, etc.) that have been independently developed. An alternative, and 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-environment. In the proposed Coastal Modelling Environment (CoastalME), change in coastal morphology is formulated 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 potential capabilities of CoastalME by integrating a cliff-beach model. We verify that CoastalME can reproduce behaviours of each individual landform-specific model. Their integration within the framework of CoastalME reveals behaviours that emerge from landforms interaction and which have not previously been captured, such as the influence of the regional bathymetry on the local alongshore sediment transport gradient. This is the first step of the framework development, which provides an alternative to directly coupling existing models.

Citation: Payo, A., Favis-Mortlock, D., Dickson, M., Hall, J. W., Hurst, M., Walkden, M. J. A., Townend, I., Ives, M. C., Nicholls, R. J., and Ellis, M. A.: CoastalME version 1.0: a Coastal Modelling Environment for simulating decadal to centennial morphological changes, Geosci. Model Dev. Discuss., doi:10.5194/gmd-2016-264, in review, 2016.
Andrés Payo et al.
Andrés Payo et al.
Andrés Payo et al.

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Short summary
CoastalME is a generic modelling environment to simulate coastal landscape evolution at spatial scales of kms to tens of kms, over decadal to centennial timescales. The novelty is that simulates coastal morphology evolution as a set of dynamically linked raster and geometrical objects. Geometrical objects are derived from the raster structure providing a library of coastal elements (e.g. shoreline) that are conventionally used for modelling coastal behaviour on the timescales of interest.
CoastalME is a generic modelling environment to simulate coastal landscape evolution at spatial...
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