How long has the Yangtze River existed? How long has it taken for the Yangtze River to develop like

During the Jurassic period of 100 million years ago, the Yanshan movement formed the Tanggula Mountains in the Yangtze River, and the Qinghai-Tibet Plateau slowly elevated, forming many high mountains and deep valleys, depressions and rift valleys. The middle and lower reaches of the Yangtze River, the Dabie Mountains and the Wushan Mountains between Sichuan and Hubei were uplifted, the Sichuan Basin was sagging, and the ancient Mediterranean Sea retreated further to the west. 100 million years ago in the Cretaceous period.

The Sichuan Basin is slowly rising. The razing effect continued to develop, and the Yunmeng and Dongting basins continued to sink.

30 million to 40 million years ago, the Eocene, the strong Himalayan movement, the Qinghai-Tibet Plateau uplifted, the ancient Mediterranean disappeared, and the Yangtze River basin generally rose intermittently. The degree of its rise is moderate in the east and sharp in the west. The high mountains on both sides of the Jinsha River protruded, and the Qinghai-Tibet Plateau and the Yunnan-Guizhou Plateau were significantly uplifted, and some fault basins were formed at the same time.

The strong downward cutting of the river has led to the emergence of many deep and steep canyons, and the water systems that originally flowed from north to south merged with each other and flowed eastward. The middle and lower reaches of the Yangtze River rise slightly, forming middle and low mountains and hills, and the low depression areas sink into plains (such as the Lianghu Plain, Nanxiang Plain, Duyang Plain, Suzhou-Anhui Plain, etc.).

By 3 million years ago, the Himalayas were strongly uplifted, and the western part of the Yangtze River basin was further uplifted. The erosion of the ancient Yangtze River from Hubei to the four basins has accelerated, cutting through Wushan, making the east and west ancient Yangtze River penetrate into one breath, and the river is mighty and mighty, injecting people into the East China Sea, and today's Yangtze River is formed.

It took about 4 to 5 years. The development time is still relatively short, which shows how much progress China's science and technology has.

It has been 222 years since the development of this state, and the cavity beam has been very good because of the current development, and the environment has been well improved in all aspects.

It should be a few hundred years by now, and the Yangtze River basin should play an even more critical role in the future.

The Yangtze River originates from the southwest side of the main peak of the Tanggula Mountains on the Qinghai-Tibet Plateau, with a total length of more than 6,300 km and a total drop of about 5,400m.

The Yangtze River is 3,496 kilometers from Zhengyuan to Yibin, and 2,884 kilometers below Yibin, totaling 6,380 kilometers. where minus.

The Jingjiang River is shortened by 80 kilometers, so the total length is 6,300 kilometers.

The Yangtze River is the longest river in Asia, with a total length of 6,397 kilometers. It originates from the main peak of Tanggula Mountain on the Qinghai-Tibet Plateau. The Yangtze River is the third longest river in the world, after the Nile River in Africa and the Amazon River in South America, and the third largest river in the world.

With a total area of 1,808,500 square kilometers (excluding the Huaihe River Basin), accounting for about 1 5 of the total land area of the country, it is called the "Mother River" together with the Yellow River.

In 2001, under the auspices of expert Liu Shaochuang, the Institute of Remote Sensing Applications of the Chinese Academy of Sciences used satellite remote sensing images to measure and calculate, and the measurement results were accurate to two decimal places. The length of the Yangtze River was measured to be 6,300 kilometers. The research team used nearly 40 satellite images covering the main stream of the Yangtze River, and the satellite images were taken by the US Earth Resources Satellite with a resolution of 30 meters.

The calculation method is to measure the Yangtze River forward direction three times and reverse three times along the center line of the river channel, and the results are obtained after many computer calculations and geometric corrections. In this study, Dangqu is measured as the source of the Yangtze River, and the specific location of the source of Dangqu (multi-dynasty energy) is 94°30 44 east longitude, 32°36 14 north latitude, and 5170 meters above sea level.

Dangqu (from the source to Nangji Balong) kilometers, Tuotuo River kilometers, Tongtian River kilometers, Jinsha River kilometers, Yibin kilometers below, a total of kilometers. The average annual water inflow into the sea is more than 9600 billion cubic meters. The basin is between 24°30 35°45 north latitude and 90°33 112°25 east longitude.

It has a long history, giving birth to Chinese civilization, nurturing the Chinese nation, and nurturing generation after generation of the sons and daughters of the Chinese nation. It is one of the three birthplaces of ancient civilizations in the world.

The Changjiang River (Yangtze River; The Yangtze River is the largest river in China, with a total length of 6,397 kilometers (with the Tuotuo River as its source), commonly known as 6,300 kilometers. The total area of the basin is more than 1.8 million square kilometers, and the average annual water inflow is about 960 billion cubic meters. The basin is between 24°30 35°45 north latitude and 90°33 112°25 east longitude, with an area of more than 180 million square kilometers (excluding the Huaihe River Basin), accounting for about 1 5 of the total land area of the country.

The average annual inflow of sea water reaches 1 trillion cubic meters, ranking third in the world. In ancient times, it was referred to as the river, and after the Six Dynasties, it was called the Great River and the Yangtze River.

The main stream of the Yangtze River, Yichang, is the upper reaches, with a length of 4,504 kilometers and a basin area of 1 million square kilometers, of which the Zhimen River is called the Jinsha River from Zhimen to Yibin, which is 3,464 kilometers long; The section of the Yibin to Yichang River is commonly known as the Sichuan River, which is 1040 kilometers long; Yichang to Hukou is the middle reach, with a length of 955 kilometers and a basin area of 680,000 square kilometers.