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三峡水利枢纽大坝位于宜昌市的长江干流上，并和其下游不远的葛洲坝水电站形成梯级调度电站。它是世界上规模最大的水电站，也是中国有史以来建设的最大型的工程项目。坝高185米，总库容393亿立方米，其中防洪库容221.5亿立方米。三峡水利枢纽有着“对上可以调蓄、对下可以补偿”的独特作用，三峡工程的防洪、发电、通航、补水等综合效益开始全面发挥。三峡大坝建成后，将形成巨大的水库，滞蓄洪水，使下游荆江大堤的防洪能力，由防御十年一遇的洪水，提高到抵御百年一遇的大洪水，防洪库容在73—220亿立方米之间。世界防洪效益最为显著的水利工程。如遇1998年洪水，可有效防御。小浪底水利枢纽小浪底是三门峡以下唯一能够取得较大库容的坝址。小浪底水库因此成为防御黄河下游特大洪水的重要工程。有效地控制黄河洪水，可使黄河下游花园口的防洪标准由六十年一遇提高到千年一遇。黄河小浪底水利枢纽工程是黄河干流上的一座集减淤、防洪、防凌、供水灌溉、发电等为一体的大型综合性水利工程。目前我们国家七大江河，从流域来讲，都能防御建国以来最大的洪水。特别是在1998年长江大水以后，中央加大了水利建设的投入。据统计，1998年到现在，全国投入2858亿元，用于防洪工程建设的投资是1734亿元。据统计，截至目前，全国已建成各类水库8.6万多座，堤防长度28.69万公里，我国大江大河主要河段已基本具备了防御新中国成立以来发生的最大洪水的能力，中小河流具备防御一般洪水的能力，保护人口5.7亿，保护耕地4.6万千公顷。全国639座有防洪任务的大、中、小型城市，有299座通过防洪工程建设达到设防标准。水利工程设施体系不断加强，大江大河大湖防洪状况极大改善，水利对人民生命财产安全的保障作用和对经济社会发展的支撑能力进一步增强。

2026年09月28日 14:01

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网友（1）：

Three gorges water conservancy hub
The dam is located in the Yangtze river mainstream, yichang and their downstream and not far from the gezhouba hydropower station of cascade hydropower station form scheduling. It is the world's largest hydropower station, the construction of Chinese history is the most large engineering projects.
Dam, 185 meters high, the total capacity of 39.3 billion cubic meters, including flood control capacity of 22.15 billion cubic meters.
The three gorges water control project has a "for the storage, can compensate for" the unique function of the three gorges project, the flood control, power generation, navigation, moisturizing and comprehensive benefit overall play began.
After the completion of the three gorges dam, will form the enormous reservoir, sluggish water, and downstream lower jingjiang river flood of flood control ability, the dam defense ten years of the worst flooding, rising to resist the worst flooding in years the flood, the capacity of the flood control in 73-22 billion cubic meters between. The most significant benefits of flood control the water conservancy project. In case of the flood, which can effectively defense.

Xiaolangdi project
There is the only can make great sanmenxia reservoir dam site. Xiaolangdi reservoir therefore become a defense of the lower Yellow River catastrophic floods of important engineering. Effective control of the Yellow River floods, can make the lower Yellow River, the flood control standard HuaYuanKou by 60 years once QianNianYiYu to improve. The Yellow River xiaolangdi project on the Yellow River basin is a collection of sedimentation reduction, flood control, water supply, irrigation, power generation FangLing, is a large comprehensive water conservancy project.

At present our country seven big rivers, from the valley speaking, can the biggest since the establishment of the defense. Especially in 1998 after the floods the Yangtze river, the central increased investment in water conservancy construction. According to statistics, 1998 to now, the investment is 285.8 billion yuan, used for flood control of the engineering construction investment is 173.4 billion yuan.
According to statistics, by now the country has built more than 86000 seats, all kinds of reservoir dyke 286900 kilometers long, the large rivers in our country has basically met the main reach the defense since the founding of the worst flooding ability, medium and small rivers have defense of the flood protection ability, general population of 570 million, protect arable land 46000 hectares. The national 639 seats have the task of flood control large, medium and small cities, there are 299 buildings through the flood control engineering construction to fortify standards. Water conservancy project continuously strengthen infrastructure system, big rivers and lakes, the water conservancy and flood control status great improvement of people's life and property security role in economic and social development and further enhance the support ability.

网友（2）：

不会