Historical background information of the Yellow River

According to various researches, the Paleo-Yellow River has three stages of development: the Early Pleistocene of the Tertiary to Quaternary Period is the gestation period of the Paleo-Yellow River. The middle Pleistocene of the Quaternary Period (1.15 million to 100,000 years ago) was the birth and growth period of the Paleo-Yellow River. Late Pleistocene (100,000 years to 10,000 years ago) the Yellow River formed the oceanic water system.

Historical period of the Yellow River in the upper and middle reaches of the plain section of the river, the river has also evolved, and some changes are also very large. Such as Inner Mongolia Hetao section of the river, before 1850 Dengkou below, mainly divided into two branches, the northern branch of the mainstream, go to the foot of the Yinshan Mountain known as the Wuga River, the southern branch of the Yellow River that is the present day. 1850 Xishan mouth of the Wuga River downstream of the silt blockage of the cut-off of about 15 kilometers, the southern branch of the river has become the mainstream, the northern branch of the back of the set of irrigation district has become the back of the water channel.

Longmen~Tongguan River also swings more. However, the evolution of these sections of the river has little effect on the development of the Yellow River as a whole. The channel change of the Yellow River occurs mainly in the lower reaches.

Historically, the lower reaches of the Yellow River have been subject to channel changes roughly as far as the Haihe River in the north and the Jianghuai River in the south. According to historical documents, the lower reaches of the Yellow River have been flooded more than 1,500 times, and there have been more than 20 major diversions.

Expanded Information

The Yellow River Irrigation District in Inner Mongolia is one of China's famous large irrigation districts. Its scope from the east edge of the Ulan Buh Desert in the west, east to the eastern suburbs of Hohhot City, the northern boundary of the Wolf Mountain, Wulashan, Dazhengshan, south of the Ordos Plateau, including the Hetao, Tumecheon, the Yellow River, the south bank of the irrigation area. Across the Ikezhao League, Bayannur League and Hohhot, Baotou, Wuhai 3 cities in 19 banners (counties, districts).

The total land area of 28.91 million mu, the existing 18.78 million mu of arable land, 9.36 million mu of irrigated area, agricultural population of 2.01 million, per capita arable land of 9.3 acres, of which 4.7 acres of water.

Ningxia Yellow Irrigation District, is one of the four oldest irrigation districts in China, has more than 2,000 years of irrigation history. Known as the "South River on the Seas", it is the main grain, cotton and oil producing area of Ningxia, and one of the 12 commercial grain bases in the country.

The irrigation area involves Qingtongxia City, Yongning County, Yinchuan City, Helan County, Pingluo County, Taoluo County, Huinong County, Shizuishan City, and Zhongwei County, Zhongning County, Wuzhong City, Lingwu City and other four counties (cities) of the Yellow River irrigation part of the counties (cities), counting 12 counties (cities), and more than 20 state-run farms, forests and ranches.

Fen River Irrigation District, located in the central Shanxi Province, Taiyuan Basin, the area is distributed on both sides of the Fen River, from the northern suburbs of Taiyuan City in the north on the Lancun, south of Jinzhong District Jiexiu County, Hongxiang Village, a length of about 140km, east-west width of about 20km, west of Taiyuan (Taiyuan) Fen (Fenyang) highway and the Magyar River as a boundary, east of Taiyuan (Taiyuan) San (Sanmenxia) highway and the South Tongpu Railway as a boundary.

The irrigation area across Taiyuan, Jinzhong, Lvliang three cities, 12 counties (cities, districts)*** 56 beneficiary townships (townships) of the 488 villages, the whole irrigation control land area of 2,055,500 acres, of which 1,568,400 acres of arable land. Designed to irrigate an area of 1,495,500 mu, the beneficiary area accounts for about nearly one-tenth of the province's water land area, is one of the largest self-flowing irrigation areas in Shanxi Province.

References

The Yellow River (the second longest river in China)_Baidu Encyclopedia?