New Zealand Journal of Marine and Freshwater Research abstracts

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CIRCULATION AND HYDROLOGY OF MANUKAU HARBOUR

R. A. Heath

M. J. N. Greig

B. S. Shakespeare

New Zealand Oceanographic Institute, DSIR, P.O. Box 12-346, Wellington North, New Zealand

Abstract Current meter and current drogue measurements made over tidal periods show that the circulation in Manukau Harbour is mainly tidal, with strongest flows within the inner harbour in the four main channels. In the entrance channel, peak tidal speeds reach 2.25 m.s-¹ at the surface, and 0.6 m.s-¹ near the bottom. Salinity and temperature observations show that the water is nearly homogeneous with depth in summer. A residence time of 22 d is calculated, assuming the small horizontal salinity contrast is maintained by freshwater inflow and evaporation.

N.Z. Journal of Marine and Freshwater Research 11 (3) : 589-607
Received 12 August 1976; revision received 18 November 1976.

PDF file of entire paper: medium quality (948K); (scanned from paper original: notes about this process)

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