一、问题的提出为了满足日益兴起的地方工业、乡镇企业、农村生产及生活用电的需要,在有水力资源的地方必须大力发展中小水电。预计“七五”期间我国将新建一大批中小型水电站,因此,在资源限制的情况下,合理选择工程项目,科学地进行投资决策,实现“以有限的投入, First, the issue raised In order to meet the growing needs of local industry, township enterprises, rural production and living electricity, hydropower resources must be vigorously develop in small and medium-sized hydropower. It is estimated that during the “Seventh Five-Year Plan” period, a large number of small and medium-sized hydropower stations will be built in our country. Therefore, under the condition of resource constraints, we should rationally choose engineering projects and make scientific investment decisions so as to achieve "