Practice and reflection on water works regulation in the Yongding River Basin of Beijing City——Case study of the response to the Haihe "23·7" basin-wide extreme flood

From July to August 2023, the Haihe River Basin experienced a "23.7" basin-wide catastrophic flood due to the northward movement of Typhoon 2305 "Doksuri" and the abnormally northward influence of the subtropical high pressure in the northwest Pacific. The Yongding River section in Beijing has been opened for the first time with the use of the Daning Reservoir and the other two detention reservoirs for flood diversion and storage. Based on the practice of water works regulation in the Yongding River section in Beijing, this paper briefly describes flood forecasting and scheduling strategies, sorts out the scheduling processes of Zhaitang Reservoir, Sanjiadian Sluice, and Lugouqiao complex, summarizes the experience of implementing forecasting regulation, fine scheduling, and unified basin-wide regulation, and proposes countermeasures and suggestions from the aspects of precise forecasting scheduling technology, emergency response to unexpected situations, and improvement of intelligent scheduling capabilities.