Since 2010, Yongchen Wang, a senior reporter and mediator of the Central People’s Broadcasting Station, has organized a long-distance trip along the Yellow River every year. The purpose of this trip is to witness, record and expose the ecological crisis along the Yellow River. In addition to environmental volunteers participating in this self-driving trip, it also includes media reporters. Wang Yongchen plans to go through the Yellow River every year for ten consecutive years. From the Yellow River estuary in Dongying, an industrial city on the eastern coast of China, to the source of the Yellow River in the Qinghai-Tibet Plateau, which is inaccessible, records the ten-year changes of the mother river's ecological environment, especially the water pollution.
Professor Pu Qi introduced the Yellow River to the participants of this event at Huayuankou in 2018. With the progress of the water and soil conservation project in the upper and middle reaches, the use of the Xiaolangdi in the middle reaches has been implemented, and the riverbed in the lower Yellow River has not been raised. He introduced the latest situation of the lower Yellow River and answered the questions from the audience. At the same time, analogous to the arid rivers in North China, such as the Juma River in Hebei Province, the Weihe River in Shanxi Province, and the Yongding River in Beijing, there have been dramatic changes in water and sand in recent decades, and no floods have occurred. According to the statistics of the Ministry of Science and Technology, two-thirds of the rivers in the northern region have already become dry rivers. Professor Pu Qi fully proved that "the Yellow River has undergone tremendous changes, and floods will never occur."
Professor Pu Qi also introduced the situation of the Yellow River at the estuary and answered everyone's questions. 90% of the sediments of the Yellow River come with the flood. The amount of sand in the dry season is very small. As long as the reservoir is used well, it is necessary to adjust the sediment for many years and make full use of the flood discharge to benefit the reservoir. The Ministry of Water Resources has achieved the goal of macroscopic management of the lower reaches of the Yellow River, such as “unbreached dikes, continuous flow of rivers, water quality not exceeding standards, and riverbeds not rising”.
From May 14th news on the Yellow River Institute of Hydraulic Research (Zhonghongwang.com of Beijing), Pu Qi recently wrote the article "The riverbed in the lower Yellow River has not been raised." The author believes that the trend of water and sediment caused by the treatment of the upper and middle reaches of the Yellow River has caused a drastic change in the flood control situation of the downstream channels. The downstream flood flow and the amount of sand have been gradually reduced, and the amount of sand transported to the estuary has also been greatly reduced. The siltation extension is weakened and its influence on the upstream river channel is negligible.
From May 14th news on the Yellow River Institute of Hydraulic Research (Zhonghongwang.com of Beijing), Pu Qi recently wrote the article "The riverbed in the lower Yellow River has not been raised." The author believes that the trend of water and sediment caused by the treatment of the upper and middle reaches of the Yellow River has caused a drastic change in the flood control situation of the downstream channels. The downstream flood flow and the amount of sand have been gradually reduced, and the amount of sand transported to the estuary has also been greatly reduced. The siltation extension is weakened and its influence on the upstream river channel is negligible.
The author emphasizes that in order to prevent problems in the over-managed of rivers in North China, causing the environment in the lower Yellow River to deteriorate and maintain the healthy life of the Yellow River, "Wide River Harnessing Plan" should be revised as soon as possible.
