古而不老的都江堰

Core Viewpoint - The Dujiangyan irrigation system, a 2,200-year-old ancient water conservancy project, continues to thrive and play a crucial role in agricultural development and ecological balance in the Sichuan region, showcasing the harmony between human engineering and nature [3][4][5]. Group 1: Historical Significance and Engineering - Dujiangyan is the only ancient water conservancy project still in use today, representing one of the earliest successful practices of human-nature harmony [3]. - The project was initiated in 256 BC by Li Bing, transforming the Chengdu Plain from a marshy area into a fertile agricultural region [4]. - The main components of the system include the fish mouth dam, the flying sand weir, and the bottle-shaped water intake, which work together to manage water flow and sediment [4]. Group 2: Modern Developments and Impact - The effective irrigation area of the Dujiangyan system has expanded from 2.86 million acres at the founding of New China to 11.65 million acres by 2025, serving over 30 million people [6]. - The annual water supply from the irrigation area is stable at over 7 billion cubic meters, contributing nearly 25% of Sichuan's grain production and almost half of the regional GDP [7]. - Recent projects, such as the Sanhuang Branch Canal, have further extended the reach of Dujiangyan's water resources, enhancing agricultural productivity in surrounding areas [6]. Group 3: Technological Advancements - The Dujiangyan irrigation area has implemented a digital twin model for real-time monitoring and management, significantly improving operational efficiency [8][9]. - The establishment of a "smart room" has streamlined water resource scheduling and management, reducing response times for water delivery from hours to minutes [9]. - The integration of advanced monitoring systems has enabled precise water resource allocation, ensuring timely irrigation for over 6 million acres of rice [9]. Group 4: Future Projects and Investments - The "Yin Da Ji Min" project, the largest cross-basin water diversion project in Sichuan's history, is set to enhance the water supply network, benefiting over 34 million people and increasing irrigated areas by 1.79 million acres [10]. - Sichuan's water conservancy investment has reached over 70 billion yuan in 2025, doubling the investment from the previous five-year plan, focusing on large and medium-sized irrigation projects [10][11]. - The ongoing modernization efforts aim to improve water resource management and ensure sustainable agricultural development in the region [12].