黄河下游防洪工程于2025年8月通过竣工验收并投入运用。黄河下游防洪工程是黄河流域防洪体系的重 要组成部分，也是国务院明确的172项节水供水重大水利工程之一。工程总投资66.99亿元，涉及黄河干 流河南省洛阳市孟津区至山东省东营市垦利区共14个市47个县（区），治理范围共计820公里，主要建 设任务包括加固堤防、改建加固险工及建设堤顶道路等。工程建成后，将提高黄河堤防整体抗洪能力， 进一步提升险工和控导工程坝垛、护岸强度，有效提高抵御洪水冲刷和控导河势能力。 2025年11月4日，国家水网骨干工程东庄水利枢纽工程正式下闸蓄水。作为黄河流域水沙调控体系中的 关键一环，东庄水利枢纽工程致力于解决渭河长久以来的"水沙异源"问题。工程位于陕西省咸阳市泾河 下游峡谷末端，混凝土双曲拱坝最大坝高230米，总库容32.76亿立方米，年总供水量4.35亿立方米。工 程建成后，将成为陕西库容最大、坝高最高的水利工程，50年内预计减少入渭泥沙30亿吨、入黄泥沙25 亿吨。此外，通过拦蓄洪水、调水调沙，可有效提高泾河下游防洪标准，保障西安、咸阳、渭南3个市9 个县（区）近150万人和80万亩耕地的防洪安全，全面改善渭北"旱腰带"地 ...

Group 1: Project Progress and Impact - The second phase of the Yinhanshui project is progressing rapidly, with the northern trunk line expected to be fully connected by the end of this year [2] - The Yinhanshui project has supplied 1.19 billion cubic meters of water to Xi'an in the first half of this year, accounting for over 50% of the main urban area's water consumption [1] - Since the project's inception, it has supplied over 3 billion cubic meters of water to Xi'an, significantly enhancing its functions in water supply, power generation, flood control, and ecology [1] Group 2: Water Resource Management and Investment - Water resources are crucial for national economic and social development, with significant investments in water infrastructure in Shaanxi during the 14th Five-Year Plan period [3] - As of June 30 this year, Shaanxi has completed water investment totaling 192.85 billion yuan, with numerous key water projects underway [8] - The East Zhuang Water Conservancy Hub is the only water conservancy project in the country under construction that has water diversion and sediment regulation functions, with completion expected by the end of 2026 [8] Group 3: Agricultural Support and Irrigation - The Jiao Kou Water Diversion Irrigation District has provided stable water sources for agriculture, allowing crops to withstand drought conditions [4] - The irrigation district has diverted a total of 360 million cubic meters of water this year, irrigating 3.3 million acres, setting a record since its establishment in 1970 [7] - The provincial irrigation projects are essential for ensuring food security and supporting agricultural production in the region [6]

Core Viewpoint - The construction of the Dongzhuang Water Conservancy Hub is a significant development project aimed at enhancing flood control, sediment management, and regional water supply in Shaanxi Province, contributing to the ecological protection and sustainable development of the Yellow River basin [1][3][4]. Group 1: Flood Control and Sediment Management - The Dongzhuang Water Conservancy Hub will improve flood control standards from a 10-year to a 20-year frequency, reducing the impact of 100-year floods to 50-year floods in the Weihe River downstream [3]. - The project is expected to intercept 3.051 billion tons of sediment from the Jing River and 2.5 billion tons from the Yellow River, significantly alleviating the sediment burden on the downstream waterways [3]. Group 2: Water Supply and Irrigation - Upon completion, the hub will provide an annual water supply of 435 million cubic meters to urban and industrial areas, achieving a water supply guarantee rate of 95% [4]. - The irrigation guarantee rate for the Jinghui Canal irrigation area will increase from 30% to 50%, supporting regional agricultural development [4]. Group 3: Power Generation and Environmental Impact - The hub will feature four mixed-flow generating units with a total capacity of 110 megawatts, generating an average of 285 million kilowatt-hours annually, saving 90,000 tons of coal and reducing carbon dioxide emissions by approximately 250,000 tons [4]. - The project will create a 97-kilometer long water surface area, improving local microclimates and providing better habitats for fish and migratory birds [5]. Group 4: Technological Innovations and Milestones - The planning and construction of the Dongzhuang Water Conservancy Hub have involved overcoming significant technical challenges, leading to the development of advanced systems such as digital twin technology and visual monitoring platforms [6]. - The project is recognized for several world-first achievements, including being the first high arch dam built primarily for flood control and sediment reduction [6].

Core Viewpoint - The East Zhuang Water Conservancy Hub Project has successfully passed provincial-level acceptance for the resettlement of displaced residents, paving the way for the reservoir to begin water storage as scheduled [1] Group 1: Project Acceptance - The acceptance committee conducted on-site inspections in four counties (Liqian, Chuhua, Binzhou, and Yongshou) to verify the completion of resettlement and related facilities [1] - Experts assessed the living conditions of the displaced residents and reviewed reports on the implementation and management of the resettlement work [1] - The committee unanimously agreed that the resettlement measures and protective works were completed, allowing for the project to proceed to the water storage phase [1] Group 2: Future Plans and Recommendations - Relevant units are urged to address issues raised by experts and to implement a systematic approach to problem resolution [1] - By the end of October, a comprehensive population assessment for the four counties involved in the project is to be completed to ensure residents can benefit from support policies by 2026 [1] - The provincial water resources department emphasizes the importance of safety inspections for housing and infrastructure at resettlement sites, as well as expediting land allocation and supporting the development of displaced residents' livelihoods [1]