What did China do in the Yangtze River? Dig 300 million cubic meters of silt and blow up 1 million tons of reefs

The Yangtze River, with a total length of 6,387 kilometers, is second only to the Nile River in Africa and the Amazon River in South America among the largest rivers in the world, ranking third in the world. As the mother river in the southern region, the Yangtze River has always been praised by the Chinese people. The Yangtze River Basin accounts for one-fifth of China's land area and also feeds one-third of the population of mainland China. The main source of the Yangtze River is the Tuotuo River in the southern part of Hoh Xil, Qinghai. Its source, Geladan Dong Snow Mountain, is the true birthplace of the Yangtze River. The landscape at the source of the Yangtze River is very magnificent. Breathtaking scenery.

Today, the Yangtze River is already a famous golden waterway in my country, but the channel of the Yangtze River is not smooth. Every year there are 480 million tons of sediment and silt, and 60 square kilometers of shoals are formed. It is very difficult to remediate the Yangtze River channel, but it is urgent. . Therefore, since 1987, my country has carried out channel dredging every year, but due to water flow factors and technical constraints, the channel depth can only be maintained at about 7 meters, which means that cargo ships of more than 25,000 tons cannot enter the Yangtze River. of.

At the same time, the ecological environment of the Yangtze River is very fragile, and any carelessness will cause the extinction of finless porpoises and other organisms. The Yangtze River dredging project faces multiple difficulties, far exceeding river dredging projects in other countries. Professor Zhang Zhizhong, who had participated in construction geological exploration when he was young, was still thinking about the progress of the political Yangtze River Channel Project. With the efforts of these people, it only took 21 years from construction to completion. What you need to know is that it took 45 years to renovate the Seine in France, 160 years to renovate the Mississippi River in the United States, and it only took 21 years for my country to see that the strength of China's infrastructure is indeed not to be underestimated.

During the dredging process of the Yangtze River, the engineering volume of the Yangtze River Channel was too large and the surrounding area lacked rocks. The traditional riprap structure dyke could not be constructed at all. So the newly developed semi-circular breakwater was used in the construction. A new type of dredger was specially developed. A total of 320 million cubic meters of silt was dug from the mouth of the river. The silt was used to fill land and build a wetland of 63,600 acres, of which about 100 million cubic meters of dredged soil were used The enclosure project of Hengsha Dongtan and Pudong Airport was reclaimed into land, covering an area of ​​more than 74,000 mu. At the same time, blasting technology was used many times in the opening of the upstream channel. Only the North Sea Fleet’s reef blasting team blew up 1 million tons of reef upstream and expanded the channel width from 30 meters to 60 meters, which is enough to see the difficulty of the construction of the Yangtze River dredging. .

Through the unremitting efforts of several generations, the water depth of the lower Yangtze River channel is now 12.5 meters. The third and fourth generation container ships can pass around the clock. The fifth and sixth generation container ships and the 100,000-ton full-load bulk carrier and the 200,000-ton class reduce Bulk cargo ships can pass through the tide. In 2017, benefiting from the Yangtze River Estuary's deep water channel, Shanghai Port had a passenger throughput of 2.89 million passengers, a year-on-year increase of 76.2%, making it the fourth largest cruise ship home port in the world.

It is predicted that since the opening of the Yangtze River Estuary's 12.5-meter deep-water channel, the deep-water channel has produced an average annual economic benefit of more than 10 billion yuan. The increase in freight volume will drive an average annual GDP growth of more than 100 billion yuan. The annual average exceeds 100,000.

Benefiting from the deep-water channel of the Yangtze River Estuary, the construction of Shanghai’s international shipping center, financial center, trade center and economic center has been accelerated, and conditions have been created for the extension of the 12.5-meter deep-water channel to Nanjing, which has greatly enhanced the “river-sea combined transport” capacity of the upper and middle reaches of the Yangtze River, and vigorously promoted The freight volume of the Yangtze River trunk line has ranked first in the world river transport for many consecutive years and the regional economy has developed rapidly.