Observation of the Dynamics and Horizontal Dispersion in a Shallow Intermittently Closed and Open Lake and Lagoon (ICOLL)

K Suara; Neda Mardani; Helen Fairweather; Adrian B McCallum; Chris Allan; Roy C Sidle; Richard Brown

doi:10.3390/w10060776

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Observation of the Dynamics and Horizontal Dispersion in a Shallow Intermittently Closed and Open Lake and Lagoon (ICOLL)

Journal article

Open access

Peer reviewed

Observation of the Dynamics and Horizontal Dispersion in a Shallow Intermittently Closed and Open Lake and Lagoon (ICOLL)

K Suara, Neda Mardani, Helen Fairweather, Adrian B McCallum, Chris Allan, Roy C Sidle and Richard Brown

Water, Vol.10(6), pp.1-21

2018

DOI: https://doi.org/10.3390/w10060776

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Abstract

mixing and transport

estuary

tide

inland

pollution

liters

Among the 135 or more estuaries on the southeast Australian coastline, 45% are intermittently open. A number of others, which would normally have an intermittently open entrance, are kept permanently open to improve the flushing and water quality that are functions of the horizontal dispersion of the estuarine system. Field studies that investigate the dynamics and horizontal dispersion processes of open and closed states of Intermittenly Closed and Open Lakes and Lagoons (ICOLL) are conducted. Clusters of Lagrangian drifters were used to characterise the surface flow. Horizontal dispersion coefficients (K) under study varied significantly for different tidal phases; the mean ebb tide K (~4.7±3.8 m2 s-1) is an order of magnitude higher than that of the flood tide. During the closed state, K values were up to two orders of magnitude lower than those observed in the open state. These results highlight the contribution of tidal dispersion to transport and mixing processes within an ICOLL. The results showed that tidal pumping effects and tidal-induced horizontal velocity gradients are responsible for the horizontal surface transport and dispersion occurring during the open inlet state. The horizontal surface dispersion processes identified at different inlets and environmental conditions within this site are valuable for managing transport of particles, freshwater mixing, larvae transport, waste, and pest control.

Details

Title: Observation of the Dynamics and Horizontal Dispersion in a Shallow Intermittently Closed and Open Lake and Lagoon (ICOLL)
Authors: K Suara (Author) - Queensland University of Technology
Neda Mardani (Author) - University of the Sunshine Coast
Helen Fairweather (Author) - University of the Sunshine Coast
Adrian B McCallum (Author) - University of the Sunshine Coast
Chris Allan (Author) - Sunshine Coast Council (Australia)
Roy C Sidle (Author) - University of the Sunshine Coast
Richard Brown (Author) - Queensland University of Technology
Publication details: Water, Vol.10(6), pp.1-21
Publisher: MDPI AG
Date published: 2018
DOI: 10.3390/w10060776
ISSN: 2073-4441
Copyright note: Copyright © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Grants: Innovative Global Navigation Satellite Systems (GNSS) - enabled technology for monitoring regular and flooded flows in Australian Waters., LP150101172, Australian Research Council (Australia, Canberra) - ARC
Organisation Unit: K'gari Research Cluster; School of Science and Engineering - Legacy; Indigenous and Transcultural Research Centre; Cancer Research Cluster; School of Science, Technology and Engineering; Sustainability Research Cluster
Language: English
Record Identifier: 99451486802621
Output Type: Journal article

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Web Of Science research areas: Environmental Sciences; Water Resources

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