Browsing by Author "Kluss, T"

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    Evolving role of radiotracers in coastal zone studies
    (Pergamon-Elsevier Science Ltd., 2003-03-01) Airey, PL; Hughes, CE; Kluss, T; Duran, EB; Miller, BM; Chiuenta, S; Nielsen, AF; Hollins, SE
    Recent advances in the off-shore radiotracing program in the Asia Pacific region are described with examples from the Philippines, Thailand, Hong Kong and Australia. Advances are driven by changing requirements from the user community which include: (1) the need to experimentally evaluate the output of numerical models underpinning engineering and environmental investigations; (2) the need to address increasingly sophisticated questions posed by researchers into coastal ecosystems; and (3) the need to respond to pressures from regulators to minimise the level of tracer released to the environment. Four stages in the recent evolution of tracer technology are identified. Crown Copyright © 2003 2003 Published by Elsevier Science Ltd.
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    The evolving role of radiotracing in integrated coastal zone management investigations
    (National Association for Applications of Radioisotopes and Radiation in Industry, 2001-12-01) Airey, PL; Hughes, CE; Hollins, SE; Kluss, T
    A review is presented of the off-shore radiotracing program at ANSTO. Special reference is made to the impact that sophisticated numerical modelling is making to the design of tracer studies underpinning engineering and environmental investigations in the coastal zone. Much of the research is designed to reduce the freedom modellers have in setting parameter values. Emphasis being placed on studying of the fate and behaviour of particulates and cohesive sediments, on measuring the impact of wind fields on transport and on obtaining field measurements of model parameters such as hydrodynamic shear stress. (author)
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    Field verification of formulations for sand transport under wave and current action
    (Institution of Engineers, Australia,, 2001-10-05) Nielsen, AF; Kluss, T; Hughes, CE; Sojisuporn, P; Chueinta, S; Adamantidis, CA
    This paper presents and compares field and analytical data on the net transport of sand under wave and tidal current action as measured and computed at the entrance to a large estuary on the south-east coast of Thailand. The field data comprised time histories over six weeks of wind speed and direction, tidal stage variation and the direct measurement of sand transport at two locations in shallow water using radioisotope tracer techniques. Analytical formulations were used to estimate wave conditions, tidal current velocities and sediment transport rates. Comparison of results showed that the analytical formulations predicted very well the magnitude and direction of the net transport of sand at the two locations over the six-week period where the field measurements were made. © 2021 Informit
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    Three dimensional numerical modelling of circulation patterns in Manila Bay, Philippines
    (Institution of Engineers, Australia, 2001-10-05) Miller, BM; Chadwick, MJ; Kluss, T; Hughes, CE; Duran, EB
    Flow processes found in Manila Bay, Philippines are dominated by complex wind driven currents. Flow circulation within the bay has a significant impact upon the water quality and sediment transport processes occurring in the bay. This paper presents the outcomes of a study, funded by the International Atomic Energy Agency, which used a combination of field data collection and numerical modelling techniques to assess the distribution of Red Tide algal blooms within Manila Bay. This paper presents the model verification against nuclear tracer experiments and the three dimensional hydrodynamics of Manila Bay. Field experiments were undertaken using radioactive isotope tracers to track flow currents at selected locations in the bay. The data from the field experiments were used to validate a threedimensional hydrodynamic (RMA-10) model of the bay. The methods of presenting the radioactive isotope tracers results and comparison of model results and experimental data are presented in this paper. The outcomes of the field data collection and numerical modelling work clearly demonstrate the importance of representing three-dimensional flow processes in defining the hydrodynamic behaviour of the bay. The significance of wind generated currents and the resulting three-dimensional flow patterns is indicated by both field data and model results. A comparison against model results obtained using a two-dimensional depth-averaged flow approximation is presented to further highlight this point. © 2021 Institution of Engineers, Australia