论文部分内容阅读
目前平差计算的基本方法,仍然用M·M·安德列亚捷夫法或哈代·克罗斯法。但原始资料,特别是用水量资料的收集是一关键,对平差结果有直接影响。过去,常用的方法是统计人口数,并对大工业、大用户的集中用水逐户进行调查。我们在长沙、衡阳、津市等地的管网平差中,就曾用此法,也取得一定的效果。但是,此法的缺点是费时费力,且调查的水量往往随着被调查人的责任心和缺水的心理状态而相差极大。因此,一个用户的需水量常常需要反复调查、分析和核实,才能得到比较可靠的数据。
At present, the basic method of adjustment calculation still uses M·M Andreajef or Hardy Kroth. However, the collection of raw data, especially water consumption data, is a key factor that has a direct impact on the adjustment results. In the past, the commonly used method was to count the number of the population and investigate the centralized water use of large industries and large users. We have used this method in the adjustment of pipe networks in Changsha, Hengyang, and Tianjin, and we have also achieved certain results. However, the disadvantages of this method are time-consuming and laborious, and the amount of water surveyed often varies greatly depending on the respondents’ sense of responsibility and lack of water. Therefore, the water demand of a user often requires repeated investigation, analysis and verification in order to obtain more reliable data.