这张幻灯片概述了2004年夏天达拉斯水务公司发生的一次水质事件的案例研究。有关有色水和低余氯的投诉导致公用事业公司评估某些工艺变更是否对混合区产生影响。 EPS模型用于评价配水系统的水质。介绍了水龄、源迹、混合区和管道材料。观察结果包括: 混合区和混合区之间没有明确的关系 未解决的有色水投诉； 附近普遍存在无衬里管道 未解决的颜色投诉地点； 很可能是经过改造的配水系统 巴赫曼和东区之间的化学反应 水处理厂从无衬里管道中析出铁；和 当Bachman 放回管线上可能会沉淀铁。包括表格、数字。

This slide presentation outlines a case study at the Dallas Water Utilities where a water quality event in the summer of 2004 occured. Complaints of colored water and low chlorine residual caused the utility to evaluate whether certain process changes were having an impact in mixing zones. EPS modeling was used for evaluating the water quality in the distribution system. Water age, source trace, mixing zones, and pipe materials are presented. Observations included: no clear relationship between mixing zones and unresolved colored water complaints; a prevalence of unlined pipe exists in the vicinity of the unresolved color complaint locations; it is likely that modified distribution system water chemistry between Bachman and Eastside WTPs precipitated iron out of unlined pipes; and, reversed flow direction when Bachman was placed back on line may have precipitated iron. Includes tables, figures.