WAVE SETUP AND OTHER TIDAL ANOMALIES IN COASTAL RIVERS

Eko Santoso; David Hanslow; Peter Nielsen; Kevin Hibbert

doi:10.9753/icce.v26.%p

No. 26 (1998), Conference Proceedings

No. 26 (1998)

WAVE SETUP AND OTHER TIDAL ANOMALIES IN COASTAL RIVERS

Conference Proceedings

https://doi.org/10.9753/icce.v26.%25p

Published 1998-01-29

Eko Santoso⁺⁻
David Hanslow⁺⁻
Peter Nielsen⁺⁻
Kevin Hibbert⁺⁻

Eko Santoso

Department of Civil Engineering, The University of Queensland

David Hanslow

New South Wales Department of Land and Water Conservation, Coastal Branch

Peter Nielsen

Department of Civil Engineering, The University of Queensland

Kevin Hibbert

New South Wales Department of Land and Water Conservation, Coastal Branch

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Keywords

coastal river
setup
tidal anomaly

How to Cite

Santoso, E., Hanslow, D., Nielsen, P., & Hibbert, K. (1998). WAVE SETUP AND OTHER TIDAL ANOMALIES IN COASTAL RIVERS. Coastal Engineering Proceedings, 1(26). https://doi.org/10.9753/icce.v26.%p

Abstract

The tailwater level is together with rainfall the most important input to flood modeling in coastal rivers. Thus, the needfor an ocean-river interface which can provide tailwater levels for numerical models is obvious. The state ofthe art is however not very advanced. Detailed waterlevel profiles through the Brunswick River entrance from 500m inside the breakwaters to 150m outside during a wide range of weather conditions revealed that the wave setup through the zone of wave breaking is much smaller than what is being used by practicing modelers in Australia. Barometric effects of the order lcm per hPa is only a minor part of the tidal anomalies, which range up to 0.8m 500m inside the breakwaters, and wind effects, although not modeled in detail, are estimated to be small on the fairly narrow continental shelf of South East Australia. Tidal anomalies of the order 0.5 to 0.7 metres have been observed in the absence of rainfall and strong local winds during Cyclone Roger in 1993. An offshore record indicated that a substantial fraction of this tidal anomaly (of the order 0.25m) also occurred in 25m of water offshore from the Tweed River on the border between New South Wales and Queensland. This indicates the presence of weather related oceanic forcing of a nature which is not understood in detail.

https://doi.org/10.9753/icce.v26.%25p

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WAVE SETUP AND OTHER TIDAL ANOMALIES IN COASTAL RIVERS

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