Saturday, October 21, 2017
   
Text Size

Site Search powered by Ajax

Tidal waves hit Haining, China

World’s largest tidal bore sweeps down the Qiantang River.

Qiantang River

The surging Qiantang tidal bore has wowed spectators at the Mid-Autumn Festival in Haining, in eastern China's Zhejiang province.

The bore travelled 55km from the mouth of the Qiantang River to Daquekou, one of the best observation points along the river.

The waves towered nearly seven metres high, according to Reuters, before crashing into a dam wall one after the other.

A tidal bore is a series of waves which runs up a river, formed when the incoming tide collides with the outgoing one.

Surfers and kayakers can travel great distances on the wave as it follows the river along its meandering path.

Bores can only form when the mouth of a river is shallow and uniform, so they are seen in relatively few rivers of the world. However, they can be seen in the River Severn in England, the Brahmaputra in India and the Amazon in Brazil.

As the tide rises, the water is funnelled into an increasingly narrow channel, thereby forming the large waves. The precise dimensions of the rivers determine their exact shape and size.

The tidal bore that forms on the Qiantang River is believed to be the largest one in the world. It can regularly be up to nine metres (30ft) in height, but at times it can be much higher.

As a bore is generated by the tide, just as some tides are bigger than others, some bores are also more spectacular than others on the same river.

The size of the tidal wave is also affected by the weather. If the winds are blowing upstream, the water will be forced along the river creating a larger bore. Conversely, if the wind is blowing downstream, the bore will be smaller.

In extreme cases, the weather can make a bore extremely dangerous. In August 2013, a typhoon made landfall in eastern China, causing the Qiantang bore to swell more than 20 metres. It was so powerful that a seawall gave way in Haining injuring dozens of people.


blog comments powered by Disqus

Subscribe via RSS or Email:

Labour's Jacinda Ardern set to beco...

Read More

North Korea threatens 'unimaginable...

Read More

China's Xi vows to carry on anti-co...

Read More

US knew of Indonesian anti-communis...

Read More

Flooding returns to southern Queens...

Read More

Qatar's leader denounces 'unjust si...

Read More

Global_News

Iraqi forces and allied Shia militias claim control of Kirkuk province after intense battle against Kurdish forces.

Read More

Donation

Thanks to all of our supporters for your generosity and your encouragement of an independent press!

Enter Amount:

Featured_Author

Login






Login reminder Forgot login?

Subscribe to MWC News Alert

Email Address

Subscribe in a reader Facebok page Twitter page

Week in Pictures

Diwali: The festival of lights

Is it autumn yet in Europe?