Core Insights - The Yellow River's flood and drought management during the 2025 summer-autumn flood season was successfully concluded, with the Yellow River Water Resources Commission effectively responding to 94 instances of flood exceeding warning levels, ensuring the safety of people's lives and property [1] Group 1: Flood and Drought Management - The Yellow River basin experienced significant weather fluctuations, with a notable drought from March to June followed by intense rainfall in July and August, and a marked increase in autumn rainfall, with October's cumulative rainfall nearly four times higher than the historical average [1] - The commission implemented a coordinated operation of 55 water projects across the upper, middle, and lower reaches of the river, significantly reducing peak flood flow from 6,900 cubic meters per second to 2,670 cubic meters per second, achieving a peak reduction rate of 61.3% [1] Group 2: Water and Sediment Regulation - The Yellow River's water and sediment regulation achieved multiple objectives, including drought relief and ecological water supply, with the Sanmenxia Reservoir discharging 335 million tons of sediment and the Xiaolangdi Reservoir discharging 222 million tons [2] - The total water storage in key reservoirs at the end of the flood season reached historical highs, with the Xiaolangdi Reservoir's water level at 270.20 meters, the highest for this time of year, and a total storage of 10.552 billion cubic meters in six reservoirs, the second highest for the same period [2] Group 3: Future Preparedness - As the Yellow River approaches the ice flood season, the commission plans to summarize this year's flood management experiences, address weaknesses, and maintain vigilance to ensure effective preparations for ice flood prevention [2]

Group 1 - The Yellow River Water Resources Commission has initiated water and sediment regulation for the flood season of 2025 due to recent rainfall affecting the middle reaches of the Yellow River [1] - The operation aims to balance flood defense and sediment discharge, adhering to principles of safety and comprehensive consideration [1] - The water regulation will last approximately one week, with the Xiaolangdi Reservoir's maximum discharge flow controlled at around 2800 cubic meters per second [1] Group 2 - The Sanmenxia Reservoir began controlled discharge at 3000 cubic meters per second from September 7, 15:00, until it transitions to free discharge [1] - The Xiaolangdi and Xixiaoyuan reservoirs are jointly regulated, with controlled discharge starting at 1500 cubic meters per second from September 7, 15:00, and increasing to 2500 cubic meters per second from September 8, 9:00 [1] - Future adjustments to discharge flows will be made in real-time based on reservoir inflow and sediment discharge conditions, with a shift to flood control measures if significant flooding occurs in the middle reaches of the Yellow River [1]