New Zealand Journal of Marine and Freshwater Research abstracts

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Sediment transport near the Tauranga Entrance to Tauranga Harbour

R. J. Davies-Colley*

and

T. R. Healy

Department of Earth Sciences, University of Waikato, Hamilton, New Zealand

Abstract Sediment transport at the Tauranga Entrance was studied in relation to tidal currents and waves. Bedforms resulting from tidal flow were investigated with scuba divers and echo-soundings. The alignment and scale of bedforms indicated the direction and approximate rate of sediment transport. Sediment transport was measured directly using sediment traps, and results were compared with rates calculated by another method. Maximum sediment transport rates of 20 000-30 000 g.nT¹ per half tidal cycle occur near the inlet gorge, but rates vary considerably in time and space, depending mainly upon power of tidal currents. A model of sediment transport for this inlet has been evolved based on tidal flow streamlines, bedform features, and the measured and calculated rates of sediment transport.

N.Z. Journal of Marine and Freshwater Research 12 (5) : 237-43. Received 29 April 1977; revision received 25 October 1977.

PDF file of entire paper: medium quality (680K); (scanned from paper original: notes about this process)

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