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南水北调西线工程效益主要包括农业灌溉效益、城镇供水效益、黄河干流增加的水力发电效益以及社会和生态环境效益。分析结果表明，2030年水平，调水45～195亿m3的不同方案每年可产生的直接经济效益为213～809亿元，单位调水量的经济效益为4．73～4．15元／m3。同时，还将产生明显的社会和生态环境效益。
The benefits of the West Route Project of the South-to-North Water Transfer Project mainly include the benefits of agricultural irrigation, the benefits of urban water supply, the benefits of hydropower generation from the mainstream of the Yellow River, and the benefits of social and ecological environment. The analysis results show that, at the level of 2030, the direct economic benefits generated by different schemes of diverting 4-15 billion cubic meters of water will be 213-80.9 billion yuan per year, and the economic benefit per unit of water volume will be 4.73-4.15 yuan/m3. At the same time, it will also produce significant social and ecological environmental benefits.