Analysis of tidal and residual currents across semi-enclosed bay mouth based on shipboard ADCP measurements.
Based on 25 hours shipboard ADCP measurements across semi-enclosed bay mouth(Kemen Channel), time series of tidal currents over 12 sites, which distribute evenly along the transect, were constructed to improve our understanding of tidal characteristics and residuals in this region. The tidal currents in Kemen Channel were identified as the regular semidiurnal and reversing tidal flows, with its behaviour more like standing waves. Moreover, the flood currents in the lower layers were found to be ahead of that in the upper layers and vice versa for ebb tides. The major of tidal ellipse for M2 constituent was found to be larger close to the southern side of the channel, with its incline also increasing toward the south. The signs of M4 constituent were also found mainly nearby the end points of this transect, indicating the importance of nonlinearity in tidal dynamics due to the shallower topography. A two-layer structure was found for the residual currents in Kemen Channel, flowing northeastwardly out of the Bay in upper 20 m and southwestwardly into the bay in the lowers. Besides approximate 4.81x108 m3 water exchanges were determined between the Luoyuan Bay and outer seas by the calculation of tidal flux through Kemen Channel.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | English |
| Published: |
2012
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| Subjects: | Tidal currents, Residual currents, Transport, |
| Online Access: | http://hdl.handle.net/1834/5847 |
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