On November 25th, the reporter learned from the Ministry of Water Resources that the National Science and Technology Terminology Review Committee's 2025 Work Conference and Academic Annual Meeting were recently held in Beijing. During the conference, 68 cutting-edge hot topics in science and technology research for 2025 covering 11 disciplinary fields were released, among which 5 hot topics in water science and technology research, including "National Water Network", "Intelligent Dam", "Digital Twin Water Conservancy System", "Drought and Flood Emergency", and "Happy River and Lake", were successfully selected. The hot topics in the forefront of water conservancy science and technology released this time were collected and recommended by the National Water Conservancy Science and Technology Terminology Review Committee under the guidance of the National Science and Technology Terminology Review Committee and the International Cooperation and Science and Technology Department of the Ministry of Water Resources. After multiple rounds of expert argumentation and review, they were determined. It is reported that the "National Water Network" refers to a comprehensive system based on natural rivers and lakes, with water diversion and drainage projects as channels, regulation and storage projects as nodes, and intelligent regulation as means, integrating functions such as optimized allocation of water collection resources, flood control and disaster reduction in river basins, and protection of aquatic ecosystems. Intelligent dam "is a product of the deep integration of new generation information technology and traditional dam engineering. Its core lies in achieving thorough perception, intelligent analysis, precise decision-making, and collaborative management of the entire lifecycle of dam engineering through technologies such as the Internet of Things, big data, artificial intelligence, and digital twins. The "Digital Twin Water Conservancy System" is a comprehensive system that takes physical water conservancy objects as units, spatiotemporal data as the base, mathematical models as the core, and water conservancy knowledge as the driving force. It digitally maps, intelligently simulates, and anticipates the entire process of physical water conservancy elements and water conservancy governance management activities. It operates synchronously with physical water conservancy objects, interacts with reality and virtuality, and iteratively optimizes. It consists of digital twin watersheds, digital twin water networks, and digital twin water conservancy projects. "Sudden turn of drought and flood" refers to the process of emergency turning to flood control and flood fighting, emergency rescue and disaster relief due to sudden extremely heavy rainstorm and flood when drought in a region or basin continues to worsen and efforts are being made to fight against drought. It is an extreme disaster event that occurs in a short period of time when drought and flood are reversed and alternated. Happiness River and Lake "refers to a river and lake that can maintain the stability of the ecological system structure and function of the river and lake, maintain the healthy life of the river and lake, ensure the safety and stability of the river and lake, promote high-quality development of the basin, achieve river and lake safety, clear water and fish leaping, beautiful green scenery on the banks, livable and business friendly, harmonious human and water, and give the people in the river and lake area a high sense of security, satisfaction and satisfaction. It is reported that the National Science and Technology Terminology Review Committee is an authoritative institution authorized by the State Council to review and publish scientific and technological terms on behalf of the country. Its subordinate National Water Conservancy Science and Technology Terminology Review Committee is responsible for the review and standardization of water conservancy science and technology terms. (New Society)