水利部门完成丹江口水库170米满蓄目标

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]