Core Viewpoint - The Pearl River Basin's unified scheduling effectively mitigates saltwater intrusion, ensuring a stable water supply for the Guangdong-Hong Kong-Macao Greater Bay Area [1][2] Group 1: Water Supply Management - The Pearl River Water Resources Commission reported that the region faced challenges due to "less rain, strong winds, and high tides," marking the first test of water supply security this year [1] - Since December 2025, the cumulative rainfall in the Pearl River Basin has been only 37.1 millimeters, which is 49% less than the average, leading to a significant reduction in natural water inflow [1][2] - To ensure water supply safety, the Commission has implemented a "freshwater supplement" strategy, releasing 6.1 billion cubic meters of water downstream since December 2025, increasing the flow of the West River by nearly 60% [2] Group 2: Impact on Saltwater Intrusion - The strong freshwater flow has effectively suppressed saltwater intrusion, with the main water intake points in Zhuhai experiencing only minor exceedances [2] - The average flow of the West River reached 3,300 cubic meters per second in January 2026, an increase of 1,550 cubic meters per second compared to natural inflow, demonstrating the effectiveness of the water management strategy [2] Group 3: Multi-faceted Benefits - The "freshwater supplement" strategy not only secured water supply but also achieved benefits across power generation, navigation, irrigation, and ecology [2] - Power generation at hydropower stations such as Tianyi, Longtan, and Baise increased by 33% to 80% year-on-year, contributing positively to the stability of the power grid [2] Group 4: Future Monitoring and Management - The Pearl River Water Resources Commission maintains sufficient water storage in the reservoir groups to meet future comprehensive water demand [2] - The Commission plans to enhance monitoring and forecasting of rainwater and salinity to implement precise water management strategies [2]

Core Insights - Guangdong's water management system has effectively maintained reservoir water levels despite uneven rainfall distribution during the pre-flood season, achieving a total adjustable water volume of approximately 74 billion cubic meters, which is 77% of the planned capacity [1] Group 1: Rainfall and Water Management - The rainfall in Guangdong during the pre-flood season showed significant variability, with April experiencing a 39% decrease, May a 13% increase, and June remaining stable compared to historical averages [1] - The East River and Han River basins recorded rainfall deficits of 33% and 38% respectively, while the North River basin saw a 30% increase in rainfall [1][3] - The provincial water authority has proactively developed a water scheduling plan for the five major river basins to ensure flood safety and maximize water storage [1][4] Group 2: Water Supply and Ecological Safety - The main reservoirs have exceeded their water storage targets, with a total adjustable water volume of 73.8 billion cubic meters and a recovery volume of 21.7 billion cubic meters by July 1 [3] - All ecological flow and minimum discharge requirements for seven national monitoring sections have been met, ensuring water supply for both Guangdong and neighboring regions [3] Group 3: Future Outlook - The post-flood season is expected to present complex climatic conditions, with rainfall predicted to be higher in the western regions and lower in the east, alongside the potential impact of 3 to 5 tropical cyclones [4] - The provincial water authority plans to enhance monitoring and strictly implement water scheduling to maintain water storage effectiveness and ensure supply and ecological safety [4]