The 1-min ADCP data were first averaged over 11 minutes to reduce data size, then averaged over 12.4 hours to derive the residual current that contains little M2 tidal component.

• 分析方法是先将每笔1分钟的ADCP 资料做11分钟的平均以减少资料量，再做12.；4小时的滑动平均得出剩馀流速（仍含一部份的全日潮流）。