Core Insights - The Danjiangkou Reservoir has reached its normal water level of 170 meters for the third time since its dam height was increased, marking a significant achievement in flood prevention and water storage for the Han River basin [1][2] Group 1: Rainfall and Flood Characteristics - The Han River basin experienced extreme drought conditions from January to August, followed by an unusually strong autumn rain starting from late August, which is characterized by four notable features [1] - The autumn flood began early and has lasted longer than usual, starting on August 25, which is 8 days earlier than the average, and has continued for 55 days as of October 18, exceeding the average duration by 16 days [1] - There were 11 significant rainfall events during the autumn flood period, with the upper reaches of the Han River receiving a total precipitation of 573 millimeters, which is 2.8 times the average for the same period, marking the highest since records began in 1961 [1] - The frequency of numbered floods was high, with seven occurrences between September 5 and October 18, making it the most concentrated autumn flood period on record [1] - The total inflow to the Danjiangkou Reservoir during the autumn flood was approximately 29.7 billion cubic meters, which is about 2.7 times the average for the same period and the second highest since the reservoir was built in 1969 [1] Group 2: Water Management and Safety Monitoring - The Yangtze River Water Resources Commission is effectively managing the water resources by coordinating the Danjiangkou Reservoir and other control reservoirs in the Han River basin to achieve flood control and water storage goals [2] - Current safety monitoring data indicates that the dam's operational status is normal, water quality is stable and meets standards, and the safety of the reservoir banks is under control [2] - The Ministry of Water Resources and the Yangtze River Commission will continue to monitor rainfall in the Han River basin closely and enhance safety monitoring of the reservoir and its surroundings [2]

Core Insights - The National Flood Control and Drought Relief Headquarters held a meeting to assess the rainfall situation during the National Day and Mid-Autumn Festival, focusing on flood prevention in the Yangtze and Pearl River basins [1] Group 1: Rainfall Forecast and Flood Risk - A forecast indicates three rainfall events across the country in the next ten days, with significant water level rises expected in various rivers, including the Han River and the Yu River, which may experience severe flooding [1] - The current flood risk is heightened due to increased population movement during the holidays, raising concerns about mountain floods and small river flooding [1] Group 2: Flood Prevention Measures - Emphasis on strict and detailed monitoring of mountain flood disasters, with dynamic adjustments to warning thresholds based on rainfall and surface conditions [2] - Strengthening flood defenses for small rivers by enhancing patrols in key areas and ensuring timely evacuation of at-risk populations [2] - Ensuring the safety of reservoirs and ongoing water conservancy projects, particularly focusing on small and dangerous reservoirs [2] - Implementing precise management of the Han River basin's reservoirs to achieve a target water level while ensuring flood safety [2] - Coordinated management of the Yangtze River reservoir system, optimizing the Three Gorges Reservoir's operation to meet various demands [2] - Continuous monitoring and forecasting of potential typhoons and heavy rainfall to prepare for subsequent flood risks [2]

Core Points - The article discusses the severe flooding and heavy rainfall that has affected multiple regions in northern China since July 23, with significant impacts on infrastructure and local communities [1][10][11] Group 1: Flood Impact - The Haihe River basin has experienced record flooding, with the maximum inflow to the Chaobai River reaching 6,550 cubic meters per second, the highest since the reservoir's establishment in 1959 [1][13] - Various regions, including Beijing's Miyun District, Inner Mongolia, and Gansu, have faced urban flooding, road interruptions, and secondary disasters such as landslides [1][10] - As of July 28, a total of 6,404 individuals have been relocated across 19 towns and 168 villages in Miyun District alone, with additional evacuations in Hebei and other areas [10][11] Group 2: Emergency Response - Local governments have rapidly mobilized to respond to the crisis, coordinating rescue efforts and relocating affected residents [1][6] - Emergency teams from various sectors, including fire, police, and medical services, have been deployed to assist in rescue operations, often facing challenging conditions due to blocked roads [8][10] - The State Grid of Hebei has activated emergency plans, deploying 478 repair personnel to restore power in affected areas [11] Group 3: Water Management - The Ministry of Water Resources has implemented precise management of flood control measures, with the Miyun Reservoir achieving a flood retention rate of 99% to alleviate downstream pressure [13][15] - Continuous monitoring and scientific scheduling of water reservoirs are being conducted to prepare for further rainfall and ensure the safety of downstream areas [15][17] - The Central Meteorological Observatory has issued ongoing weather warnings, indicating the potential for continued heavy rainfall in the coming days [15][17]