Core Viewpoint - The article highlights the transformation of the Huai River management from passive defense to proactive control, showcasing advancements in technology and engineering over the past 75 years, which have significantly improved flood management and water resource allocation [1][2][4]. Group 1: Historical Context - The Huai River was historically known as one of the most difficult rivers to manage in China, with an average of 94 floods every century from the 16th century until the founding of the People's Republic of China [2]. - The management approach relied heavily on manpower, exemplified by the 1991 flood disaster where temporary shelters were set up for displaced residents, and flood control was primarily reactive [2]. Group 2: Engineering Developments - The Huai River basin has seen the construction of over 8,600 reservoirs, 86,000 kilometers of levees, and more than 40,000 sluices, forming a comprehensive flood control system capable of withstanding the largest floods since the establishment of New China [2][4]. - The completion of the Huayuan Lake flood control gate in 2020 marked a shift from uncontrolled flooding to managed flow, enhancing flood control capabilities [3]. Group 3: Technological Innovations - The implementation of the "Four Preventions" system (forecasting, early warning, drills, and plans) has become a core operational system for flood management, achieving a maximum flow forecasting error of less than 10% [4]. - The system successfully predicted the maximum water level of Hongze Lake at 13.60 meters with an error of only 3 centimeters, demonstrating the effectiveness of advanced forecasting techniques [4]. Group 4: Future Prospects - The integration of digital technologies and AI in river management is expected to enhance efficiency and precision, moving towards a more scientific and comprehensive management approach [5][6]. - The ongoing development of digital twin technologies for river basins and water networks aims to further improve water resource management and flood control strategies [6].

Group 1 - The core focus of the news is the development of an integrated monitoring and sensing system for water management in Beijing, referred to as the "Sky, Air, Water, and Engineering" system [1][2][3] - The system includes various innovative water management technologies such as unmanned cleaning boats, unmanned mowing boats, and intelligent monitoring systems for floating algae [1][2] - The construction of the Dianziling Reservoir, which will utilize intelligent construction methods, marks a significant advancement in Beijing's water infrastructure [1][4] Group 2 - The "Sky" component involves remote sensing satellite monitoring of water bodies, with drones assisting in capturing images for water monitoring [2] - The "Air" aspect focuses on the installation of rain radar systems, with three rain radar towers already deployed to predict rainfall in the Yongding River basin [2][3] - The "Ground" part consists of hydrological stations and ground-based radar equipment to monitor surface water conditions [2] - The "Water" segment includes unmanned vessels that can monitor water quality and aquatic life, while the "Engineering" component covers automation in monitoring dam displacements and leaks [2][3] Group 3 - The Dianziling Reservoir is designed to have a total capacity of 6.77 million cubic meters and is intended to enhance flood control capabilities in the region [4] - The use of AI technology in the construction of the reservoir is expected to improve construction efficiency by approximately 40% compared to traditional methods [4] - The project is classified as a disaster recovery and reconstruction initiative, with a design flood standard of once in 50 years and a verification flood standard of once in 500 years [4]

Group 1 - The core message emphasizes the importance of implementing flood prevention measures and adhering to the directives of the central government to ensure public safety and stability during flood seasons [1][2][3] - The inspection team, led by the Minister of Water Resources, focused on assessing flood prevention work in various regions, including the Xiangjiang and Zishui river basins, and identified weaknesses in current flood control measures [1][2] - A modern rainwater monitoring and forecasting system is to be established, integrating satellite, radar, and hydrological networks to enhance flood prediction accuracy and extend the forecast period [2][3] Group 2 - The need for a comprehensive defense system that includes responsibility allocation, decision support, and command coordination is highlighted to ensure effective flood management [3] - Emphasis is placed on the importance of early warning systems and organized evacuation plans to protect vulnerable populations from potential flood risks [3] - The management of small and dangerous reservoirs, as well as key levees, is crucial for flood preparedness, with a focus on proactive measures and early detection of potential hazards [3]