Zhanghe River originates in Shanxi Province and ends at the junction of Henan Province and Hebei Province. Zhanghe, also known as Zhangheng, belonged to the Yellow River system at the end of the Western Han Dynasty, but later became the Haihe River basin with the migration of the South Yellow River. Zhanghe River is divided into upper and lower reaches, and the upper reaches are composed of Qingzhang River and Zhangzhuo River, but both of them originate from the hinterland of Taihang Mountain in Shanxi. The lower reaches of Zhanghe River is the dividing line between Hebei Province and Henan Province, also known as Zhangwei River.

First, the direction of the Zhanghe River

Zhanghe River has a very long history, with a total length of about 400 kilometers, which mainly flows through 2/kloc-0 counties and cities in China. The upper reaches of Zhanghe River are Qingzhang River and Zhangzhuo River, both of which originated in Shaanxi, but the origins of Qingzhang River and Zhangzhuo River are different. The birthplace of Qingzhang River is divided into two parts. Dongyuan mainly originated near Cao Zhang Village, and Xiyuan mainly originated in Bafuling. Zhangzhuohe River is divided into three sources: north, west and south. The two rivers originated from different sources and finally merged in Hezhang Village to form Zhanghe River.

The main stream of Zhanghe River flows from west to east. Qingzhang River mainly flows through Shanxi Province, with a total length of about 146 km. It starts in guo jia cun and flows into Hezhang Village, with a total length of about 6 1 km. Zhang Zhuo originates from Gedonggou, goes all the way to the east, passes through Taigong area, and then flows into Guanjiahegou from the north. After Yueyang, turn to the east.

Second, the hydrological characteristics of Zhanghe River

Historically, droughts often occurred in the upper reaches of the Zhanghe River, while floods occurred in the lower reaches of the Zhanghe River. As we all know, the Yellow River system has the characteristics of high sediment concentration and good siltation, and Zhanghe, as the Yellow River system, also has these characteristics. Zhanghe River contains a lot of sediment. Although it was later merged into Haihe River system, the sediment transport capacity of Zhanghe River is almost the same as that of Yongding River.

Most of the Zhanghe River basin is located in the windward side of Taihang Mountain, and it is particularly prone to heavy rain and other weather in July and August in summer. Every summer, because of heavy rain, there are many floods near Taihang Mountain. For example, in 1963, the flood peak of Zhanghe River reached 5470 cubic meters per second.