一、前言生活污水量变化系数是影响污水管道设计流量的重要因素之一。但建国二十多年来一直采用苏联测定的系数,至于这个系数是否合理,是否符合我国国情,是偏大还是偏小,却是不得而知心中无数。遵照伟大领袖毛主席关于“认真搞好斗、批、改”“独立自主,自力更生”的教导以及国家建委关于搞好设计标准、规范修订工作的指示,我们小组与北京市政工程管理 I. INTRODUCTION The coefficient of variation of domestic sewage volume is one of the important factors affecting the design flow of sewage pipelines. However, since the founding of the People’s Republic of China, it has used the coefficient determined by the Soviet Union for more than two decades. As to whether this coefficient is reasonable and whether it is in line with China’s national conditions, whether it is too large or too small, it is not known to count. In accordance with Chairman Mao’s instructions on “conscientiously fighting, criticizing, renovating,” “independent, self-reliance, and self-reliance,” and instructions from the State Construction Commission on how to do a good job in designing standards and standardizing revision work, our team and Beijing municipal engineering management