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dc.contributor.authorLynch, Kevin
dc.contributor.authorJackson, Derek W. T.
dc.contributor.authorCooper, J. Andrew G.
dc.identifier.citationLynch, Kevin, Jackson, Derek W. T., & Cooper, J. Andrew G. (2016). The fetch effect on aeolian sediment transport on a sandy beach: a case study from Magilligan Strand, Northern Ireland. Earth Surface Processes and Landforms, 41(8), 1129-1135. doi: 10.1002/esp.3930en_IE
dc.description.abstractExperiments were conducted on Magilligan Strand, Northern Ireland, to assess the influence of the fetch effect on aeolian sediment transport. During each experiment surface sediments were uniformly dry and unhindered by vegetation or debris. The leading edge of erodible material was well defined, with the limit of wave up-rush demarcating the wet-dry boundary; the work was conducted during low tides. A number of electronic and integrating traps were utilised, with two ultrasonic anemometers used to measure wind direction and velocity at 1 Hz. The combination of 1 degrees direction data and trap locations resulted in a range of fetch distances, from 2 to 26 m. Data integrated over 15-minute intervals (corresponding to the integrating trap data) revealed a distinct trend for all the experiments. An initial rapid increase in the transport rate occurred over a short distance (4-9 m). This maximum transport rate was maintained for a further 5-6 m before a steady decay in the flux followed, as fetch distance increased. A measured reduction in wind speed (6-8%) across the beach suggests a negative feedback mechanism may be responsible for the diminishing transport rate: the saltating grains induce energy dissipation, thus reducing the capability of the wind to maintain transport. For one experiment, the presence of compact sediment patches may also have contributed to the reduction of the transport rate. The decay trend calls into question the utility of the fetch effect as an important parameter in aeolian studies that seek to understand sediment budgets of the foredune-beach zone. Copyright (C) 2016 John Wiley & Sons, Ltd.en_IE
dc.description.sponsorshipThis work is part of a Vice Chancellor's Research Scholarship funding for PhD studies at the Centre for Coastal and Marine Research, School of Environmental Sciences, University of Ulster.en_IE
dc.relation.ispartofEarth Surface Processes And Landformsen
dc.subjectFetch effecten_IE
dc.subjectAeolian sediment transporten_IE
dc.subjectSecondary air flowen_IE
dc.subjectOffshore windsen_IE
dc.subjectCoastal dunesen_IE
dc.titleThe fetch effect on aeolian sediment transport on a sandy beach: a case study from Magilligan Strand, Northern Irelanden_IE
dc.local.contactKevin Lynch, Geography Department, Nui Galway. 5779 Email:

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