놀라운 해일파도

Tidal Wave - a rare natural phenomenon, during which the tide generates a wave that travels along a river or narrow bay,

 causing the water begins to move against the river.

The phenomenon of tidal waves occur in several locations around the world. In fact, for the occurrence of tidal waves is necessary to

 observe a number of conditions: the river should be small, should have a narrow access to the sea. 

Drop during the flow of water must also be large - usually more than 6 m between high and low water.

Tourists gather on the banks of the Qiantang River to see the tidal wave in Haining, Zhejiang Province, September 13, 2011.

Although hot flashes are stable and non-hazardous, tidal waves are less predictable. 

The development of the tidal wave depends on several factors, including the depth of the river and wind power, which can vary depending 

on the season. 

Tidal waves can happen every day, like a tidal wave on the Batang river in Malaysia.

Other tidal waves, such as Pororoka on the Amazon River in Brazil, which occur during spring tides.

Tidal Wave on the Qiantang River.

The world's largest tidal wave occurs along the Qiantang River in Hangzhou, China, where the waves reach up to 9 meters

 in height and moving up the river at a speed of 40 kilometers per hour. 

The roar of the tidal wave can be heard for a few hours before she comes to the place and the water remains standing with elevated

 levels for several hours after high tide phenomenon takes place.

Here, this phenomenon is called the Silver Dragon, and takes place during the spring flood with every full moon. 

During this period, the festival of the Silver Dragon, which attracts up to 170,000 visitors a look at this phenomenon and is celebrated for 

hundreds of years. Indeed, the regular appearance of the Silver Dragon is known since 1056 AD.

Tidal Wave Pororoka (Pororoca) moves on Amazon.

In Pororoka also raises significant tidal wave that occurs in the Amazon. 

The phenomenon, which occurs in the period between February and March, causing the appearance of waves up to 4 meters high 

and rises to 800 kilometers from shore upstream on the Amazon River and surrounding. 

Pororoka name comes from the indigenous Tupi Indian language, where it is translated as "strong hum."

Tidal wave on the River Ribble Lancashire. Douglas Preston.

Tidal waves can be very violent, and many have a bad reputation: the river Seine (France); Petitsodyak River (Canada); Colorado (Mexico).

In China, along the Qiantang River and the tragic incidents happen every year. 

Tidal waves often affect the shipping and navigation in the mouth area, and can have devastating effects on wildlife.

Tidal wave arrives in Ferguson, New Brunswick.

Kayakers - the largest summer tide while creating a tidal wave in the Gulf of Turnageyn south of Anchorage, Alaska, June 5, 2012.

Tidal Wave in the Bay Turnageyn south of Anchorage, Alaska, June 5 2012.

Tidal wave moves up the Mersey River in Hale, England.

A crowd of Chinese tourists fleeing from the tidal wave, breaking through a dam on the river Kuangtang in Haining, 

East China's Zhejiang Province August 31, 2011. About 20 people, were too close to the river, suffered.

Police and ordinary people covering a tidal wave on the shore of the Qiantang River in Haining, China, 31 August 2011.

A tidal wave is along the shore of the river Tsyantantszyan 22 August 2013 in Haining, China.

Visitors walk away from the surf on the shore of the Qiantang River in Hangzhou City of Zhejiang Province, Aug. 25, 2013.

Surfers enjoy the tidal wave near to the River Severn Nyunheymom March 2, 2010 in Gloucestershire, England.

A tidal wave coming down to the river Severn in Gloucestershire, England, September 3, 1936. Sometimes the waves reached

 a height of 6 meters.