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建设项目经济评价一般均要作国民经济评价和财务评价,并以国民经济评价为主。水利为除害兴利事业,是国民经济的基础设施和社会安全保障措施,与一般工业建设项目比较,社会效益较大,针对有的部门的财务收入少甚至基本上没有财务收入(如防洪、治涝等)的特点,更应突出国民经济评价在经济评价中的核心作用,以国民经济评价的结论考虑项目或方案的取舍。1 国民经济评价水利工程的国民经济评价是从国民经济整体的角度分析计算项目需要国家付出的代价和对国家的贡献,以考察投资行为的经济合理性,为项目决策提供科学的评价依据。1.1 效益及费用的计算水利工程国民经济评价要遵循效益与费用计算口径对应的原则。据此,水利工程的投资费用和效益的分析如下:1.1.1 投资费用
Economic evaluation of construction projects are generally required for national economic evaluation and financial evaluation, and the main national economic evaluation. The water conservancy is the cause of removing harmfulness and benefiting others and is the infrastructure and social safety safeguard measures of the national economy. Compared with the general industrial construction projects, the social benefits are great. Some of the departments have little or no financial income (such as flood control, Flood control and so on), we should highlight the core role of the national economic evaluation in economic evaluation and consider the trade-off of the project or program with the conclusion of national economic evaluation. 1 National Economic Evaluation The national economic evaluation of water conservancy projects is based on the national economy as a whole analysis of the project needs to pay the cost of the country and its contribution to investigate the economic rationality of investment behavior for the project to provide a scientific basis for the evaluation. 1.1 Calculation of Benefits and Expenses The national economic evaluation of water conservancy projects should follow the principle of calculating the corresponding caliber of benefits and expenses. Accordingly, the investment cost and benefit of water conservancy project are analyzed as follows: 1.1.1 Investment costs