单向冲洗（UDF）是EPCOR水服务公司的一项重要计划。 （EWSI）确保向其客户分配高质量的水。 下面的文章描述了最近编译和分析的优化研究 七年的数据记录，以确定最有利的冲洗频率 埃德蒙顿市。 2002年的研究着眼于优化现有的UDF维护计划，以减少 冲洗频率，同时保持水质和服务。大量的 存在与UDF有效性相关的信息，因此EWSI开发了“区域” “信息频率表”。这些表提供了一个系统的布局来汇编所有信息 自1995年以来记录的适用数据。区域信息包括: 基本统计； 法拉盛历史； 水质；和 顾客投诉。 初步结论表明，埃德蒙顿现有的两年冲洗频率更高 不足以维持向EWSI客户提供的高水质服务。第一个 这项研究的结论令人鼓舞，因为它表明冲洗频率可能会降低 降低；然而，它并没有就如何根据区域划分提供指导 冲洗之间的允许时间。从文献综述和 根据埃德蒙顿的数据，五个因素或“触发因素”被确定为对治理有影响 单向冲洗的效果。 优化研究的结果是分配一到四年的冲洗时间 周期，并选择2002年或2003年作为每个UDF区域的下一年。 这项优化研究是成功的。 2002年UDF的预算运行次数为 2450; 实际运行次数为1355次。这减少了，但有效 在2002年节省了大约15万加元。在接下来的五年里 研究计划将年度UDF成本降低25%。通过由此产生的高效 此外，通过减少人力、能源和成本，将实现大幅成本节约 消费和用水。包括2个参考文献、表格和图表。

Unidirectional flushing (UDF) is an important program EPCOR Water Services Inc. (EWSI) implements to ensure the distribution of high quality water to their customers. The following paper describes the recent optimization study that compiled and analyzed seven years of data records to determine the most advantageous flushing frequencies for the City of Edmonton. The 2002 study looked at optimizing the existing UDF Maintenance Program to decrease flushing frequencies while maintaining water quality and service. An abundant amount of information related to the effectiveness of UDF existed so EWSI developed "Area Information Frequency Sheets". The sheets provided a systematic layout to compile all applicable data recorded since 1995. The area information includes: basic statistics; flushing history; water quality; and, customer complaints. Initial conclusions indicated Edmonton's existing two-year flushing frequency was more than adequate to maintain service of high water quality to EWSI's customers. The first conclusion of the study was encouraging as it indicated the flushing frequencies could be decreased; however, it did not provide direction on how to divide the areas according to allowable time between flushing. From a literature review and the availability of Edmonton data, five factors or "triggers" were determined to be influential in governing the effect of unidirectional flushing. The outcome of the optimization study was the assignment of a one- to four-year flushing cycle and the selection of either 2002 or 2003 as the next year to flush for each UDF area. This optimization study was a success. The budgeted number of UDF runs for 2002 was 2450; the actual number of runs was 1355. This reduced but effective flushing translated to approximately $150,000 Canadian dollar saving in 2002. Over the next five years, the study projects 25% reduction in annual UDF costs. Through the resulting efficient flushing, large cost savings will be realized through reduced manpower, energy consumption, and water use. Includes 2 references, tables, figures.