While the average velocity of flood and ebb tide is 69cm/s and 84cm/s at flood season and 79cm/s and 87cm/s at low-water season, the silt sediment in the estuary will re-suspend under the tide control.

• 洪季涨潮平均流速为69cm/s,落潮平均流速为84cm/s; 枯季涨潮平均流速为79cm/s,落潮平均流速为87cm/s。