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石河水库是以城市供水为主,兼顾防洪、农业灌溉、水产养殖、水力发电的综合利用工程。水费是石河水库的主要经济来源,为搞好水费征收,以前水库曾用静态分析法测算供水成本,但于水利投资的保值增值和水利工程效益的滚动发挥不利。采用动态分析法利用投资价值随时间变化而动态上涨的特点来分析测算供水成本,就克服了静态分析法中的弊端。 一、投资的分析测算 石河水库于1972年动工兴建,工程投资包括国家投资和群众投资（投劳折资）两部分。据统计,国
Shihe reservoir is mainly urban water supply, taking into account flood control, agricultural irrigation, aquaculture, hydroelectric comprehensive utilization project. Water fee is the main source of income for Shihe Reservoir. In order to improve the collection of water fee, the reservoirs used static analysis to estimate the cost of water supply. However, the preservation and appreciation of investment in water conservancy and the roll-over of water conservancy project benefit unfavorably. Adopting the dynamic analysis method to analyze and measure the water supply cost by using the characteristics that the investment value increases dynamically with the passage of time overcomes the disadvantages in the static analysis method. First, the investment analysis Shixian Reservoir construction started in 1972, construction investment, including state investment and public investment (investment and financing) in two parts. According to statistics, the country