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Mesoscale shoreface morphodynamics on a high-energy regressive coast

Backstrom, Joni T., Jackson, Derek and Cooper, Andrew (2009) Mesoscale shoreface morphodynamics on a high-energy regressive coast. CONTINENTAL SHELF RESEARCH, 29 (11-12). pp. 1361-1372. [Journal article]

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DOI: 10.1016/j.csr.2009.01.017


A 2-year investigation into shoreface morphodynamic behaviour off a high-energy headland-embayment coast in Northern Ireland reveals important process-response mechanisms that cannot be explained solely by existing conceptual models. A comparison of 14 sequential bathymetric surveys, from 1 to 24 m water depth, shows that the Portstewart shoreface is in equilibrium with modal to high-energy conditions; significant morphologic change is generally associated with summer and/or fair-weather conditions. Additionally, antecedent morphology appears to be a primary control on subsequent behaviour; shoreface areas that had accreted in the previous survey period were more likely to erode. Also, the high-energy shoreface and beach appears to be in a state of accretion over the survey period, which is consistent with a falling late Holocene relative sea-level, a linear and dissipative shoreface profile and an abundance of sand in the coastal system. (C) 2009 Published by Elsevier Ltd.

Item Type:Journal article
Keywords:Inner shelf; Sediment transport; GIS; Northern Ireland
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Geography and Environmental Sciences
Research Institutes and Groups:Environmental Sciences Research Institute
Environmental Sciences Research Institute > Coastal Systems
ID Code:1461
Deposited By: Professor Andrew Cooper
Deposited On:02 Dec 2009 13:09
Last Modified:15 Jun 2011 10:17

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