为了了解水质对配电系统水力容量的影响，C系数 （Hazen Williams管道粗糙度系数）测试、校准和评估 在全国多个地点进行和/或收集。管道粗糙度测试 在水力模型校准期间进行，以进一步评估 分配系统液压上的C值变化。水处理工艺和设备 同时对实践进行评估，以评估不同过程对环境的影响 分配系统液压。例如，运行石灰软化系统的公用事业公司 例如，在再碳化最少的情况下，显示出对低C值的敏感性，因此 配电系统承载能力较低。 水质对配电系统水力的负面影响越来越严重 能源成本越来越高，因此越来越重要，是 应仔细评估的公用事业运营。本文提供了数据 根据全国的实际配水系统，C值数据为 根据水处理工艺进行收集和评估。包括表格、数字。

To understand the impact of water quality on distribution system hydraulic capacity, C-factor (Hazen Williams Pipe Roughness Factor) testing, calibration and evaluation were conducted and/or gathered in several sites around the country. Pipe roughness testing was conducted during hydraulic modeling calibration to further assess the impact of varying C-value on distribution system hydraulics. Water treatment processes and practices were evaluated in parallel to assess the impact of different processes on distribution system hydraulics. Utilities that operate lime softening systems, for example, with minimum re-carbonation showed susceptibility to low C-values and thus lower distribution system carrying capacity. The negative impact of water quality on distribution system hydraulics is becoming increasingly important with higher energy costs and therefore, is a critical part of utility operations that should be carefully evaluated. This paper provides data from actual water distribution systems across the country were C-value data was collected and evaluated against water treatment processes. Includes tables, figures.