Developed Coasts

Nordstrom, Karl F.

doi:10.1016/b978-0-12-818234-5.00056-0

Cited by 2 publications

(3 citation statements)

References 245 publications

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“…'Recent research on the geomorphology of developed coasts has provided ample evidence of divergences in the form, surface cover and rate of change of human-altered landforms relative to natural landforms but has largely ignored the conclusions that natural landscapes are a myth, that human agency is not an intrusion into the coastal environment so much as it is now a part of the coastal environment and that human-altered landscapes can and should be modelled as a generic system'. and to go on to argue for an entirely new field of research into the morphodynamics of 'developed coasts' (Nordstrom 1994b(Nordstrom , 2000.…”

Section: Coastal Systems Modelling and Managementmentioning

confidence: 99%

Coastal processes and landforms

Spencer

French

2022

Memoirs

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This chapter charts developments in the study of coastal processes and landforms in the period between the 1960s and the end of the millennium, focusing on efforts to better understand sandy beaches, barriers and barrier islands, deltas and estuaries, tidal flats and marshes and coral reefs. The period saw the emergence of a dual focus on, first, the elucidation of landscape history from morphological and, later, stratigraphic evidence; and second, the relationships between shoreline morphology and processes of sediment movement. Particularly noteworthy was the integration of a broad spectrum of space and time scales in a conceptual framework that became known as ‘coastal morphodynamics’.

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Section: Coastal Systems Modelling and Managementmentioning

confidence: 99%

Coastal processes and landforms

Spencer

French

2022

Memoirs

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“…Coastal foredunes are valued for the hazard mitigation and protection they afford coastal communities (Doody, 2013; Hesp, 2011; Hesp & Walker, 2013, 2021; Martínez et al, 2013) and as a more sustainable and cost‐effective alternative to hard engineering structures (IPCC, 2012). Foredunes buffer the impact of storms, reduce the risk of coastal flooding and contribute to the well‐being of low‐lying coastal settlements (Nordstrom, 2000, 2013; Nordstrom & Arens, 1998; Nordstrom & Jackson, 2013; Nordstrom et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…On developed coasts, where human infrastructure is close to the shore, foredunes managed for shore protection are commonly narrower than natural dunes because landward growth is prevented by infrastructure and seaward accretion is restricted by marine processes (Nordstrom, 2000; Nordstrom et al, 2000). Such dunes are often maintained by planting exotic sand‐binding vegetation to create stable, continuous, alongshore ridge structures, similar to sedimentary dykes, with little diversity of topography and vegetation (Elko et al, 2016; Nordstrom, 2013). They may protect the hinterland from marine flooding, but they also block sand transport to the backdune (Petersen et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Wind flow dynamics and sand deposition behind excavated foredune notches on developed coasts

Nguyen

Hilton

Wakes

2022

Earth Surf Processes Landf

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This study examines wind flow dynamics and downwind sand deposition behind engineered notches in a foredune system on a developed coast. Recent studies have examined the morphodynamics downwind of such notches, however, wind flow dynamics and sand deposition in the lee of such notches is not well understood, particularly in relation to artificial foredunes on developed coasts. Wind flow dynamics behind an excavated notch at St Kilda beach, Dunedin, New Zealand is measured using vertical arrays of ultrasonic anemometers. Field data is used to validate computational fluid dynamic flow simulations to examine flow dynamics behind a foredune section with multiple notches. Sand deposition behind the notches is measured using sand pot traps. Wind direction across the depositional lobe aligns with notch orientation and the normalized wind speed increases when the incident wind direction is >10° to the shoreline in a notch that orientates 67° to the shoreline. Wind speed in the swale downwind a notch decreases when the incident wind direction shifts from alongshore to onshore normal. Flow reversal occurs when the incident wind direction approaches onshore normal (>72° to the shoreline). Helicoidal flow appears to occur in the lee of the higher foredune section when the incident wind direction is 74° to the shoreline, while alongshore flow dominates in the lower section. Most sand deposition occurs within 5 m of the depositional lobe of the notch. The orientation of excavated notches should be less than 74° relative to the shoreline to prevent the occurrence of flow reversal in the swale, which might reduce the distance that sand can be transported inland from the notches when the incident wind direction is parallel to the notch axis.

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Developed Coasts

Cited by 2 publications

References 245 publications

Coastal processes and landforms

Coastal processes and landforms

Wind flow dynamics and sand deposition behind excavated foredune notches on developed coasts

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