黄河第30次实施调水调沙 2025年黄河调水调沙正式启动

Core Points - The 2025 Yellow River water and sediment regulation officially commenced on June 23, with a significant increase in discharge flow to 2,600 cubic meters per second, marking the 30th implementation of this initiative [1][3] - The operation is expected to last approximately 17 days, with a total sediment discharge exceeding 100 million tons [1] - The Xiaolangdi Reservoir plays a crucial role in controlling 91% of the Yellow River's runoff and nearly 100% of its sediment transport [1] Summary by Sections Water Management Strategy - The water management strategy involves coordinated operations among the Wanjiazai, Sanmenxia, and Xiaolangdi reservoirs, with a maximum discharge flow of around 4,600 cubic meters per second [2] - The aim is to balance sediment discharge and ecological considerations, ensuring that sediment concentration at the Huayankou hydrological station does not exceed 359 kilograms per cubic meter [2] Historical Context and Impact - Since 2002, the Yellow River Water Resources Commission has conducted extensive research and experiments, leading to 29 previous sediment discharge operations that have cumulatively released over 2.5 billion tons of sediment [2] - These operations have successfully reduced the average riverbed elevation by 3.1 meters and increased the maximum flood capacity from 1,800 cubic meters per second to approximately 5,000 cubic meters per second [2] Objectives and Goals - The current operation aims to achieve multiple objectives, including ensuring irrigation and water supply for the downstream areas, maintaining the riverbed structure, and minimizing ecological impacts on aquatic life [2] - The initiative also focuses on ecological scheduling and delta ecological replenishment, while exploring sediment transport patterns in reservoirs and downstream rivers [2] Safety and Monitoring - The Yellow River Water Resources Commission will closely monitor weather conditions and enhance emergency response measures to ensure the safety and stability of the operation [4] - The Xiaolangdi management center will implement rigorous safety monitoring and inspections to maintain operational integrity throughout the discharge process [4]