Cluster dispersion of low Cost GPS-tracked drifters in a shallow water

Suara, Kabir, Ketterer, Tim, Fairweather, Helen, McCallum, Adrian, Vanaki, Shayan M., Allan, Chris, & Brown, Richard (2016) Cluster dispersion of low Cost GPS-tracked drifters in a shallow water. In 10th Australasian Heat and Mass Transfer Conference, 14-15 July 2016, Queensland University of Technology, Brisbane, Qld. (Unpublished)

Abstract

Managing the inlet of an Intermittently Closed and Open Lake or Lagoon (ICOLL) adjacent to urban areas is important because of risk of flooding and need to maintain the natural habitat. However, the opening and closing processes can result in an unstable system dynamics. This work investigates the dynamics of an ICOLL using clusters of low cost global positioning system drifters during a neap tide under an open inlet condition. Cluster analysis was applied to estimate the dispersion coefficients and the differential kinematic properties (DKP) of the channel. The lateral dispersion coefficient varied with the tidal phase with a flood tide mean value of 0.42 m2/s. Mean DKP values are in the order of 10-4 s-1. Results show that dispersion in the channel during an open inlet condition is dominated by the strain field resulting in convergence and divergence of surface layers. Regions of enhanced mixing likely associated with resonance were also identified. This study provides baseline information upon which to further examine the effect of conditions at the river mouth on the dynamics and particle transport in the main channel.

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ID Code: 98026
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Lagrangian particle, dispersion, horizontal shear, mixing, pollutant transport
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > APPLIED MATHEMATICS (010200)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MARITIME ENGINEERING (091100)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Funding:
Copyright Owner: Copyright 2016 [please consult the authors]
Deposited On: 15 Aug 2016 00:01
Last Modified: 15 Aug 2016 23:46

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