攻坚峡谷间 筑坝守安澜（产经观察·收官之际看工程）

Core Viewpoint - The Huanghe Guxian Water Conservancy Hub Project is a significant infrastructure initiative under China's 14th Five-Year Plan, aimed at optimizing water resource allocation and supporting ecological protection and high-quality development in the Yellow River basin [4][5]. Group 1: Project Overview - The Guxian Project is located between Jixian in Shanxi and Yichuan in Shaanxi, controlling 73% of the Yellow River's water, 60% of its sediment, and 80% of coarse sediment [5]. - The project officially entered the construction phase in July 2024 and is progressing rapidly [4]. Group 2: Construction Techniques - The project employs a unique method of riverbed blocking and year-round diversion through tunnels, allowing for construction without disrupting the river flow [6]. - The construction of two diversion tunnels, each over 1 kilometer long with a span of 18.2 meters, presents significant geological challenges due to varying rock types and stability issues [8][10]. Group 3: Technological Integration - The project utilizes advanced technologies such as 3D modeling and geological radar for pre-excavation assessments, enhancing safety and efficiency [9][12]. - A digital twin of the Guxian Project is being developed, integrating real-time data monitoring and analysis to improve construction transparency and decision-making [11][12]. Group 4: Structural Features - The Guxian Dam will be the tallest roller-compacted concrete gravity dam in China, standing at 219.5 meters, with a concrete volume exceeding 18 million cubic meters [16][18]. - The dam's design includes multiple outlets for flood control and sediment management, enhancing its multifunctional capabilities [17]. Group 5: Environmental Impact - The project is expected to create a 200-kilometer-long waterway, improving the ecological environment and providing an average annual power generation of approximately 6.348 billion kilowatt-hours [18]. - The Guxian Project aims to significantly reduce water supply costs for surrounding regions by facilitating self-flowing water from the Yellow River [17][18].