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Datum: WGS84 [ Help ]
Latitude: 30° 17.311' N
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Tidal bore in the Qiantang River, Hangzhou city.
DistanceIn the city
Easy to find?Hard to find
Public access?Public access
Special accessPaddle > 20mn or Boat
Alternative name The black dragon
DirectionRight and left
Normal lengthExceptional (>500m)
Good day lengthExceptional (>500m)
Good swell direction
Good wind direction
Swell sizeStarts working at Less than 1m / 3ft and holds up to 3m+ / 10ft+
Best tide positionLow tide only
Best tide movementRising tide
The river and the Hangzhou Bay are known for the world's largest tidal bore. The oldest known tide table is for the Qiantang River and may have aided ancient tourists wishing to see the famous tidal bore. The tide rushing into the river mouth from the bay causes a bore which can reach up to 9 metres (30 ft) in height, and travel at up to 40 km per hour (25 miles an hour). Known locally as the Silver (or Black) Dragon, the wave sweeps past Hangzhou, menacing shipping in the harbor.
In August 2013, the tidal bore turned out stronger than expected due to Typhoon Trami, reaching more than twice its usual height as it broke on the flood barrier, sweeping it and injuring numerous spectators.
There have been attempts to surf the tidal bore. The 1984 record was 11 seconds by Stuart Matthews. Then, in October 2007, a group of international surfers brought by Antony Colas, did several attempts, one wave being ridden continuously by French Patrick Audoy and Brazilian Eduardo Bagé for 1h10min, for 17 km. In September 2008 a group of American surfers convinced the Chinese government to allow them to surf a section of the river.
In November 2013, Red Bull held the first surf competition on the river, called the Qiantang Shoot Out. The bore was considered the most unusual wave in the world for a surfing contest. Source: Wikipedia
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