Abstract
During surveys of the tides and tidal currents in Seymour Narrows (1945 to 1950) the Canadian Hydrographic Service noted that there was a depression of mean sea level of the order of half a foot. There is a considerable fall of sea level along the Narrows and the square of the velocity of the current is proportional to this hydraulic head. The anomaly is a necessary consequence of the velocity, and it can be predicted from either the tidal or the tidal-current data. The annual net transport of water through the Narrows is seaward and is about five times as great as the discharge of the Fraser River.
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