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Almost every year, there is news that tide watchers are swept away by the tidal water of Qiantang River.

Statistics show that in recent 20 years, more than1000 people were killed by the tidal water in Qiantang River, among which13, 993, 86 people were instantly swept into the river by the tidal water, of which 19 people died and 40 people were unaccounted for.

Is supervision not in place? I don't think so The government built dams, set up roadblocks, posted warning signs along the river, scrolled warning signs on electronic screens and patrolled at night; Enterprises along the Yangtze River received safety training before their employees took up their posts, informing them of the dangers of water in Qian Jiangchao, and a large number of safety warnings were posted on the publicity windows of enterprises.

During the peak season of tide-watching, various reminders emerge one after another, but some people still turn a deaf ear. This is a lucky idea. Not only outsiders, but also many locals are not fully aware of the danger in Qian Jiangchao. In fact, the speed of tidal bore in Qianjiang River is too fast, and the danger often happens at the moment when people haven't reacted.

The speed of the tide is equivalent to the world record of 100 meter running. A set of data: the tidal level in Qian Jiangchao is generally1-2m, and the maximum is 3m. When the tidal bore advances, it will hit a huge wave as high as 10 meter due to the blocking of T-shaped dam and concave bank. The speed of advancing from downstream to upstream is about 20 kilometers per hour, which is vast and sweeping. At the fastest speed, it can reach 10 meter per second, which is equivalent to the world record speed of 100 meter, while ordinary people only run 6-8 meters per second.

Moreover, according to the characteristics of the tidal bore in Qiantang River, the spectacular tidal scene is often dangerous, and the advancing speed and destructive ability of the tidal bore are unmatched by flesh and blood, and its pressure is as high as 7 tons/square meter. In the past, the public still had a misunderstanding about the tides sweeping human beings, thinking that only "tidal bore" swept human beings, but in fact, the tidal water in Qiantang River is extremely dangerous, whether it is tidal or tidal. In particular, we should be careful of a kind of "dark climax", which is calm and imperceptible in the distance, but unstoppable in the vicinity, with great concealment and great danger.