本幻灯片演示概述了德克萨斯州达拉斯水务公司的一个案例研究，该研究涉及EPS建模，用于评估配水系统水质。问题定义的概要包括: 2004年夏季的具体水质事件； 有色水投诉； 低余氯；和 评估流程变更是否有影响 在混合区。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。建议包括: 保持水的一致性和相容性 分配系统中的化学； 评价水源水质； 评估治疗过程；和 分销系统的进一步评估 影响水质稳定的因素。包括表格、数字。

This slide presentation outlines a case study with the Dallas, Texas, Water Utilities that involved EPS modeling for evaluating distribution system water quality. The outline of the problem definition includes: specific water quality event in Summer 2004; colored water complaints; low chlorine residual; and, evaluate if process changes were having impact in mixing zones. 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. Recommendations included: maintain consistent and compatible water chemistry in the distribution system; evaluate source water quality; evaluate treatment processes; and, further evaluation of distribution system factors contributing to water quality stability. Includes tables, figures.