Marine radar derived current vector mapping at a planned commercial tidal stream turbine array in the Pentland Firth, U.K.

McCann, David L.; Bell, Paul S.

doi:10.1109/oceans.2014.7003186

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…The quantification of currents has a critical role in assessments for marine renewable power, e.g. tidal energy (McCann and Bell 2014;Ferreira et al 2016).…”

Section: Applications For Surface Current Datamentioning

confidence: 99%

Surface currents in operational oceanography: Key applications, mechanisms, and methods

Röhrs

Sutherland

Jeans³

et al. 2021

Journal of Operational Oceanography

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This paper reviews physical mechanisms, observation techniques and modelling approaches dealing with surface currents on short time scales (hours to days) relevant for operational oceanography. Key motivations for this article include fundamental difficulties in reliable measurements and the persistent lack of a widely held consensus on the definition of surface currents. These problems are augmented by the fact that various methods to observe and model ocean currents yield very different representations of a surface current. We distinguish between four applicable definitions for surface currents; (i) the interfacial surface current, (ii) the direct wind-driven surface current, (iii) the surface boundary layer current, and (iv) an effective drift current. Finally, we discuss challenges in synthesising various data sources of surface currents -i.e. observational and modellingand take a view on the predictability of surface currents concluding with arguments that parts of the surface circulation exhibit predictability useful in an operational context.

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“…The quantification of currents has a critical role in assessments for marine renewable power, e.g. tidal energy (McCann and Bell 2014;Ferreira et al 2016).…”

Section: Applications For Surface Current Datamentioning

confidence: 99%

Surface currents in operational oceanography: Key applications, mechanisms, and methods

Röhrs

Sutherland

Jeans³

et al. 2021

Journal of Operational Oceanography

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“…ADCP measurements, whilst still essential, do carry high risk and cost. X-band radar is an effective method of deriving surface currents over a large area and has been used in tidal flows [8], however comes with high instrument and operating costs, particularly in remote environments. Small UAV technology is increasingly accessible with consumer off the shelf UAVs providing flexible platforms with high-quality video and effective battery life at a relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Comparison of dense optical flow and PIV techniques for mapping surface current flow in tidal stream energy sites

McIlvenny

Williamson

Fairley

et al. 2022

Int J Energy Environ Eng

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Marine renewable energy site and resource characterisation, in particular tidal stream energy, require detailed flow measurements which often rely on high-cost in situ instrumentation which is limited in spatial extent. We hypothesise uncrewed aerial vehicles (UAV) offer a low-cost and low-risk data collection method for tidal stream environments, as recently techniques have been developed to derive flow from optical videography. This may benefit tidal and floating renewable energy developments, providing additional insight into flow conditions and complement traditional instrumentation. Benefits to existing data collection methods include capturing flow over a large spatial extent synchronously, which could be used to analyse flow around structures or for site characterisation; however, uncertainty and method application to tidal energy sites is unclear. Here, two algorithms are tested: large-scale particle image velocimetry using PIVlab and dense optical flow. The methods are applied on video data collected at two tidal stream energy sites (Pentland Firth, Scotland, and Ramsey Sound, Wales) for a range of flow and environmental conditions. Although average validation measures were similar (~ 20–30% error), we recommend PIVlab processed velocity data at tidal energy sites because we find bias (underprediction) in optical flow for higher velocities (> 1 m/s).

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“…Radar offers the benefits of being able to record data irrespective of daylight, under a wide range of weather and visibility conditions (except heavy rainfall, calm winds, and low waves), it does not require image correction and generally has a larger field-of-view. Information of bathymetry, waves and surface currents have been extracted from X-band radar images of the sea surface over 4-5-km radius (Bell et al, 2011(Bell et al, , 2016McCann & Bell, 2014). X-band radar as a remote sensing tool relies on the presence of backscatter known as "sea clutter," generated by a combination of direct reflections (sea spikes) and Bragg scattering from small capillary ripples on the sea surface and further modulated by sea surface waves (Skolnik, 1980).…”

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confidence: 99%

Nearshore Monitoring With X‐Band Radar: Maximizing Utility in Dynamic and Complex Environments

et al. 2021

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Marine radar derived current vector mapping at a planned commercial tidal stream turbine array in the Pentland Firth, U.K.

Abstract: Abstract-

Cited by 6 publications

References 4 publications

Surface currents in operational oceanography: Key applications, mechanisms, and methods

Surface currents in operational oceanography: Key applications, mechanisms, and methods

Comparison of dense optical flow and PIV techniques for mapping surface current flow in tidal stream energy sites

Nearshore Monitoring With X‐Band Radar: Maximizing Utility in Dynamic and Complex Environments

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