引大济岷工程启动建设 大渡河“牵手”岷江 双水源滋养平原（美丽中国）

Core Points - The Yinda Jimin Project has officially commenced construction, aiming to create a dual water source network with the Dujiangyan water supply project, enhancing regional water resource regulation capacity and supporting ecological protection in the upper Yangtze River [1][2][3] Group 1: Project Overview - The Yinda Jimin Project is a key backbone water network project as outlined in the National Water Network Construction Planning Outline, covering 8 cities and 43 counties, benefiting a population of 34.13 million [1][2] - The project will establish a water supply pattern consisting of a main line and two branch lines, with an annual water diversion capacity of 1.523 billion cubic meters, ending the reliance on a single water source for the Chengdu Plain [3][4] Group 2: Engineering Challenges - The project involves a total water conveyance length of 261 kilometers, with 95% of the route consisting of tunnels and pipelines, facing complex geological conditions [4][5] - Innovative drilling techniques are being employed to minimize environmental disturbance, including horizontal directional drilling and real-time monitoring of geological conditions [5][7] Group 3: Environmental Considerations - The project emphasizes ecological protection, implementing full-cycle ecological monitoring and dynamic restoration during construction [6][8] - Measures such as low-noise operations and green transportation are being adopted to reduce ecological disruption, with plans to enhance regional ecological corridors upon completion [8][9]