一、问题的提出水轮泵站(简称泵站)是水利、水电工程的一个组成部分,既是对水资源的开发,又是综合利用水资源发展国民经济的重要设施。泵站重点解决抽水灌溉,其次解决农产品加工和发电。按天然流量平衡条件选用适宜的装机容量仍然较小,常有弃水十分可惜。天然流量只要枯水期工作得到保证,则全年工作就有保证。现以我县湖头水位站1950～1981连续31年降水 I. PROBLEM PROBLEM Waterwheel pumping station (hereinafter referred to as pumping station) is an integral part of water conservancy and hydropower engineering. It is not only an exploitation of water resources, but also an important facility for the comprehensive utilization of water resources to develop the national economy. Pumping station focus on pumping irrigation, followed by agricultural products processing and power generation. According to the balance of natural flow conditions suitable for use of installed capacity is still small, often discarded water is a pity. Natural flow as long as the work of dry season is guaranteed, the work will be guaranteed throughout the year. Now I County Lake station 1950 ~ 1981 31 consecutive years of precipitation