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1 November 2010 Channel Dredging Trials at Lakes Entrance, Australia: A GIS-Based Approach for Monitoring and Assessing Bathymetric Change
Peter J. Wheeler, James A. Peterson, Lee N. Gordon-Brown
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Abstract

Dredging trials using trailing suction hopper dredging (TSHD) equipment were carried out across both flood- and ebb-tide deltas at the artificial entrance to the Gippsland Lakes (Victoria, Australia) during March to July 2008. These trials were designed to evaluate options for future sediment management at this location. Regular hydrodata capture before, during, and after the TSHD trials period allowed geographic information systems (GIS)–based monitoring of TSHD performance and overall flood- and ebb-tide delta bathymetric evolution. Results show that the TSHD dredging approach is far more effective in terms of net flood- and ebb-tide delta volumetric reduction, and navigation channel maintenance, than previously used maintenance dredging approaches (which relied upon the use of side-cast and cutter-suction dredging equipment). However, after the culmination of the trials, channel infill quickly took place. The information derived from analysis of the time-series bathymetry used for this study offers baseline information in support of future stakeholder consensus building regarding options for maintaining navigability and, thus, port viability.

Peter J. Wheeler, James A. Peterson, and Lee N. Gordon-Brown "Channel Dredging Trials at Lakes Entrance, Australia: A GIS-Based Approach for Monitoring and Assessing Bathymetric Change," Journal of Coastal Research 26(6), 1085-1095, (1 November 2010). https://doi.org/10.2112/JCOASTRES-D-09-00043.1
Received: 21 April 2009; Accepted: 15 July 2009; Published: 1 November 2010
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