Where is the dividing point between the upper, middle and lower reaches of the Yellow River?

The upper reaches are from the source of the river to Tuoketuohekou Town in Inner Mongolia

The middle reaches are from Tuoktuohekou Town to the garden entrance of Taohuayu in Henan Province

Taohuayu to the entrance Haikou is the lower reaches

The middle reaches of the Yellow River: the river is 1,206 kilometers long, the drainage area accounts for 45.7% of the total volume of the Yellow River, the increased water volume in the interval accounts for 42.5% of the Yellow River water volume, and the increased sediment volume accounts for 92% of the total Yellow River sediment volume. It is the main source of sediment in the Yellow River.

According to the different characteristics of the middle reaches of the river, it can be divided into three parts: the Shanxi-Shaanxi Canyon section, the Fenwei Plain section, and the section from Sanmenxia to Taohuayu.

From Tuoketuohekou Town in Inner Mongolia to Yumenkou, Shanxi. This section of the river is the longest continuous canyon on the main stream of the Yellow River. It flows through loess hilly and gully areas. It suffers from serious water and soil erosion and is the main source of coarse sediment in the Yellow River. This section of the river has a large specific drop and rich water resources. The Wanjiazhai Water Conservancy Project is located in this section.

From Yumenkou in Shanxi to Sanmenxia in Henan. The river valley in this section widens and the flow is slow. The two sides of the river section are the Weibei and Shanxi loess plateaus, which are important agricultural areas in Shaanxi and Shanxi provinces and one of the main sources of sediment in the lower reaches of the Yellow River.

The river section is divided into two parts from Xiaolangdi: above Xiaolangdi, the river runs through the middle valley, which is the last canyon on the main stream of the Yellow River; below Xiaolangdi, the valley gradually widens, which is the transitional section of the Yellow River entering the plain.

The lower reaches of the Yellow River: the river is 786 kilometers long, the drainage area accounts for 3% of the total volume of the Yellow River, and the increased water volume in the interval accounts for 3.5% of the Yellow River water volume.

The slope of the river in this section is small and the water flow is gentle. In addition, the river is wide, shallow and scattered, with serious sedimentation. The river bed gradually rises to form an "above-ground hanging river".

The Yellow River originates from the Yuegu Zonglie Basin at the northern foot of the Bayan Har Mountains on the Qinghai-Tibet Plateau, and flows from west to east through Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan and Shandong 9 provinces (autonomous regions), and finally flows into the Bohai Sea. The basin has little precipitation and is dominated by dryland agriculture. Winters are dry and springs are dry, and precipitation is concentrated in summer, autumn, July and August.

Because the middle section of the Yellow River flows through China's Loess Plateau, it carries a large amount of sediment, so it is called the river with the most sediment in the world. But in Chinese history, the diversion of the lower reaches of the Yellow River had a huge impact on human civilization.