Tianfu Nature 丨 Yibin was called "Yangtze River" (August 11, 2022)

I live in Changjiang, and I live in the end of the Yangtze River.

Drinking the Yangtze River water every day, I don't see the monarch.

Song Li Zhiyi

Bu Sui · I live in Changjiangtou

The mother river of the Chinese nation, the Yangtze River, is the first in Asia and the third world in the world.

In the broad sense, the Yangtze River refers to the source of the Yangtze River to the entrance of the Yangtze River in Shanghai, with a total length of 6,397 kilometers. But traditional cognition, the starting point of the Yangtze River refers to the intersection of the Jinsha River and the Minjiang River -Yibin City, Sichuan Province.

After the flow of the Minjiang River and the Jinsha River, it was called the "Yangtze River" below. For thousands of years, the Yangtze River Basin has used water as a bond, connecting upstream and downstream, left and right shores, and tributaries to form a large economic and social system. It has bred the long -distance Chinese civilization.

Speaking of which, give everyone a small knowledge of science -in a historical period in ancient times, there have been controversy of the Zhengjiang and Jinsha River.

In the Warring States Period, "Shangshu Yugong" wrote "Laoshan guide the river, and the east is not the tongs", thinking that the Yangtze River originated from Laoshan. The "Water Sutra Note" by the famous Geography scientist in the Northern Wei Dynasty also believes that the source of the Yangtze River is the Minjiang River.

Why do the ancients think that the Yangtze River originated in the Minjiang River? It is mainly because the Sichuan basin's water system is concentrated. When the flood is outbreak, the water volume is even more turbulent, and the traffic of the Jinsha River is relatively stable. It feels that the water volume of the Minjiang River is greater than the Jinsha River.

In the middle and late Ming Dynasty, Xu Xiake's inspections and calculations clearly proposed for the first time that the Jinsha River was the source of the Yangtze River. In his article "The source of the river", he proposed that "the source of the river must be headed by the Jinsha River."

Besides, when the relationship between Sichuan and the Yangtze River and the Yangtze River, the Yangtze River in Sichuan was 1788 kilometers, accounting for 28.40%of the total length, which is the longest dry flow in the Yangtze River. Essence In recent years, Sichuan has firmly established upstream consciousness, unswervingly implemented the policy of "focusing on big protection, not engaged in big development", building an ecological barrier in the upper reaches of the Yangtze River, and guarding this river.

Recently, the surveillance of water quality monitoring of the country in Yibin City shows that the water quality of the Jinsha River has reached the standard of surface water II standards, the water quality of the Minjiang River reaches the standard of the surface water III, and the Yangtze River dry flow water quality has been maintained on the surface water II standard for more than 300 days throughout the year. above.