在分析南水北调中线工程成本组成和口门共用成本特点的基础上，选择了分项共用成本的分摊方法，按照基本水价和计量水价组成的两部制水价机制，设计了前低后高的干线口门水价测算方案，测算了中线工程沿线各省（市）两部制水价，通过敏感性分析，识别了影响口门水价的主要因素。结果表明，设计的两部制水价方案和测算方法可行，测算得到的水价在用水户可承受水平之内，而供水量变化是影响水价的最主要因素。两部制水价机制可为南水北调中线干线口门水价的制定和调整提供参考。

Based on the cost composition and joint cost characteristics of the Middle Route of South-to-North Water Diversion Project, the cost allocation method was selected according to the features of joint cost. On the basis of two-part water price mechanism composed of the basic water price and measured water price, the water price calculation method for the entrance of main line was designed with price slope from front to back, and two-part water price for each province along the Middle Route was calculated. The sensitivity analysis was applied to characterize the main factors of water price. The results showed that the two-part water price and its determination methods are feasible and the calculated water price is within the scope of consumers’ bearing capability. Water price is greatly affected by water supply. The two-part water price mechanism can provide references for the establishment and adjustment of water price in the Middle Route of South-to-North Water Diversion Project.

南水北调中线工程科技项目(ZXJ/FW/CW-015);河南省高校科技创新团队支持计划（13IRTSTHN030）