How the Hutuo River changed from the Yellow River basin to the Haihe River basin? In fact, you can know a little about the climate, topography and history of the basin.
As we all know, today's Hutuo River originated in Shanxi and belongs to Hebei. Originated in Gouer Village, Taixishan Bridge, Fan Shi, Xinzhou City, Shanxi Province, it meets Ziya River, a tributary of Haihe River, at Zangqiao Bridge, xian county, Cangzhou City, Hebei Province. The river is 587 kilometers long and flows through Xinzhou, Yangquan, Shijiazhuang, Hengshui and Cangzhou successively, with a drainage area of 27,300 square kilometers.
Judging from the climate and topographical environment, the Hutuo River basin originates from and flows through the semi-humid areas of China, with an annual rainfall of about 400-700 mm, of which the upstream flows through the loess hills and Ding Xin Basin in Jinzhong, passes through Zhoushan and Taihang Mountain, and then comes out of Huangbizhuang Mountain. The downstream is affected by the flat terrain and low altitude of North China Plain, which slows down the water flow and widens the river channel. It is famous for its rich sediment in the north.
Because the Hutuo River mainly originates from the second step (Shanxi Plateau) and part of the third step (North China Plain) flowing through the terrain of our country, all the tributaries of the Hutuo River are above Huangbizhuang Reservoir, and there are no tributaries in the plains below. The main tributaries are Wu Yang River, Yunzhong River, Muma River, Tonghe River, Qingshui River, Nanping River and Yehe River.
As mentioned earlier, after the Hutuo River left Huangbizhuang Reservoir, due to the gentle terrain, the river speed decreased, and a large amount of sediment was deposited in the river, forming an overground river or a semi-overground river. As we all know, the more a river is silted up, the more likely it is to burst its banks and change its course. In history, the Yellow River changed its course many times, and so did the Hutuo River, which changed its course frequently after entering the plain.
As early as before the Eastern Han Dynasty, the Hutuo River was once the Yellow River system, from the Eastern Han Dynasty to the Sui Dynasty (1 century to the 6th century). With the gradual southward movement of the Yellow River and a series of human activities, such as the construction of weirs and canals to divert floods, the Hutuo River has finally become a part of the Haihe River system.