"In the area where the tide surges onto the pond, please do not go down the embankment to watch the tide." This is a warning slogan erected along the Qiantang River. But many tours

Almost every year there is news about tide watchers being swept away by the Qiantang River tide.

Statistics show that in the past 20 years, more than 100 people have been killed by the tides of the Qiantang River. Among them, the tide on October 3, 1993 instantly swept 86 people into the river, and 19 of them died. , 40 people are missing.

Is it because supervision is not in place? It doesn't seem to be the case. The government built dams and set up roadblocks. Warning slogans were posted along the river. Warnings were constantly scrolling on large electronic screens. There were also patrols at night. Enterprises along the river provided safety training to employees before joining the company, informing them of the dangers of the Qianjiang tide. A large number of safety warnings are also posted on the promotional windows.

Every time it is the peak season for tide watching, various reminders are heard constantly, but some people still ignore them. This is just a matter of luck. Not only outsiders, but even many locals do not know enough about the dangers of Qianjiang tides. In fact, the Qianjiang River surges so fast that danger often occurs before people can react.

The speed of the tide is equivalent to the world record for the 100-meter run. A set of data: The tidal head of the Qianjiang River is generally 1-2 meters, and can reach up to 3 meters. When the tide advances, blocked by T-shaped dams and concave banks, huge waves of more than 10 meters high will be hit. The speed of advancing from the downstream to the upstream is about 20 kilometers per hour, which is huge and powerful. The fastest speed can reach 10 meters per second, which is equivalent to the world record speed of the 100-meter run, while ordinary people can only run at 6-8 meters per second.

Moreover, according to the tidal characteristics of the Qiantang River, spectacular tidal scenes are often dangerous places. The propulsion speed and destructive power of the tidal surge are beyond the ability of flesh and blood to contend with, and its pressure is as high as 7 tons/square meter. rice. In the past, citizens still had misunderstandings about the tides that can sweep people away, thinking that only "surges" can sweep people away. However, in fact, the tides in the Qiantang River are extremely dangerous regardless of whether they are tidal waves or tidal waves. In particular, be careful of a "hidden tide" that can sweep away people in the distance. It's calm and undetectable when you're close, but it's overwhelming when you get close, making it very concealable and extremely dangerous.