Later, people gradually deepened their understanding of the Yangtze River, and felt that simply calling it "Jiang" or "Dajiang" could not fully express its long-standing geographical characteristics, so they named it "Yangtze River" according to its characteristics. The name "Yangtze River" began in the late Eastern Han Dynasty. After the Jin Dynasty, more and more people were called "Yangtze River". For example, Li Bai's poem "Sailing alone, the blue sky is exhausted, only the Yangtze River flows in the sky".
Because of the underdeveloped science and inconvenient transportation in ancient times, it was difficult for the ancients to know the whole picture of the Yangtze River, so many segmented nicknames were formed. The source of the Yangtze River is called Tuotuo. The section from Tuotuo River to Yushu in Qinghai is called Tongtian River. The riverbed of Tongtian River is as high as three or four kilometers above sea level. Compared with the middle and lower reaches of the Yangtze River, it is really a river that reaches the sky. When Tongtian River flows to the junction of Sichuan and Tibet, it is named Jinsha River (because placer gold is produced in the river).
Jinsha River turned seven big bays at the junction of Sichuan and Yunnan, accepted Minjiang River near Yibin, and began to be called Yangtze River. From Yibin, Sichuan to Yichang, Hubei, the total length is 1020 km. Because most of the process is in Sichuan, it is called Chuanjiang. Many tributaries of the Chuanjiang River flow into the Three Gorges, and the water volume suddenly doubles. Because there are many cliffs in the Three Gorges, it is called "Xiajiang".
After the Yangtze River crossed Yichang, the river suddenly widened and entered the two lakes plain. This is the land of ancient Jingzhou, so it is called Jingjiang. "The Yangtze River grows in Wan Li and the dangerous section is in Jingjiang", which is what it means here.
Extended data
The task of comprehensive utilization of the Yangtze River basin is extensive and complex, involving all relevant departments of the national economy and 19 provinces, autonomous regions and municipalities directly under the central government.
According to 1990 "Brief Report on Comprehensive Utilization Planning of the Yangtze River Basin" approved by the State Council, the tasks of comprehensive utilization planning of the Yangtze River Basin include water resources development and utilization, flood control, waterlogging control, hydropower generation, irrigation, shipping, soil and water conservation, river regulation in the middle and lower reaches, South-to-North Water Diversion, aquatic products, town layout along the river,
Urban water supply, water source protection and environmental impact assessment, tourism, etc. It is pointed out that basin planning should adhere to the basic principles of "unified planning, comprehensive development, appropriate division of labor and phased implementation" and correctly solve the problems of long-term and short-term, main stream and tributaries, upper, middle and lower reaches, large and small, flood control, power generation, irrigation and shipping, hydropower and thermal power, power generation and consumption, whole and local, utilization and protection of water, soil and biological resources.
South-to-North Water Transfer Project: It can improve the serious water shortage in the Yellow River, Huaihe River, Haihe River Basin and Northwest China. ?
West Line Project: Transfer water from Tongtian River, Yalong River and Dadu River in the upper reaches of the Yangtze River to the upper reaches of the Yellow River to solve the problem of water shortage in the northwest.
Mid-line project: transfer water from Danjiangkou Reservoir in Hanjiang River to supply water to the west of Huang-Huai-Hai Plain and Beijing-Tianjin.
East Line Project: Pumping water from Sanjiang Camp in Jiangdu, the main stream of the Yangtze River, for Jiangsu, Shandong, Anhui, Hebei, Tianjin and other provinces and cities.
Diversion of water from the Yangtze River to the Huaihe River: water is diverted from Yuxi Estuary, Fenghuang Neck and Shentang River on the north bank of the Yangtze River, then passes through Chaohu Lake and crosses the Jianghuai watershed to deliver water to the Huaihe River to supplement the industrial, agricultural and urban domestic water in the Huaihe River area.
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