2000多岁的都江堰仍在使用，“乘势利导，因时制宜”的治水智慧有多牛？

Core Insights - The Dujiangyan irrigation system, built over 2000 years ago, is the only ancient water conservancy project still in use today, exemplifying successful human-nature harmony [1] - The construction philosophy of Dujiangyan emphasizes "leveraging natural forces and adapting to circumstances," showcasing respect for nature while effectively managing water resources [1] Group 1: Historical Significance - Dujiangyan's greatest innovation lies in abandoning traditional dam-building methods, instead utilizing the natural topography of the Min River to create an efficient water management system [2] - The system includes three main components: the Fish Mouth (diversion dam), the Flying Sand Weir (flood control), and the Bottle Neck (flow regulation), which work together to address irrigation, flood prevention, sediment control, and flow management [2] Group 2: Construction Techniques - Historical construction techniques of Dujiangyan utilized local materials such as bamboo, wood, and pebbles, demonstrating a principle of using available resources effectively [2] - The design of structures like bamboo cages filled with stones and the conical shape of the wooden weirs reflects a harmonious relationship with nature, emphasizing flexibility over rigidity [2] Group 3: Modern Developments - Modern advancements in Dujiangyan have evolved traditional water engineering techniques, incorporating materials like steel wire and metal nets while maintaining the core philosophy of harmony with nature [3] - The irrigation area of Dujiangyan has reached 11.647 million acres, serving over 30 million people, with water quality consistently rated above Class II [3] Group 4: Societal Impact - The Dujiangyan project integrates human needs with ecological requirements, balancing water usage among various stakeholders and ensuring sustainable development [3] - The project has become a significant cultural and tourism asset, aligning with public expectations for improved quality of life and sustainable resource management [3]