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1 January 2010 Reynolds Stress Estimates in a Tidal Channel from Phase-Wrapped ADV Data
Colin D. Rennie, Alex Hay
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Reynolds stress in a tidal channel was measured for a period of 11 days in July and August 2003. A 50 to 100 cm/s ebb tide jet issues from Corkum Channel into Lunenburg Bay on the Atlantic coast of Nova Scotia, Canada. An instrumented bottom pod was deployed in Corkum Channel on a sandy area in approximately 6 m mean water depth. We focus on measurements from two acoustic Doppler velocimeters: a SonTek ADVO and a Nortek Vector. The Vector displayed smooth transitions in 1-hour mean velocity and Reynolds stress. As expected, Reynolds stress magnitude was greatest during ebb tide. The ADVO velocity data were filtered to remove intermittent noise, apparently due to unexpected ambiguity velocity phase wraps. The unwrapping procedure improved estimates of mean streamwise velocity and Reynolds stress and reduced noise in the ADVO time series. The potential for bias in Reynolds stress estimates due to differential noise between acoustic Doppler velocimeter beams is considered.

Colin D. Rennie and Alex Hay "Reynolds Stress Estimates in a Tidal Channel from Phase-Wrapped ADV Data," Journal of Coastal Research 2010(261), 157-166, (1 January 2010).
Received: 19 June 2008; Accepted: 3 October 2008; Published: 1 January 2010

ADV bias
ADV filtering
ambiguity velocity
ebb tide jet
Reynolds stress
spectral analysis
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