近年来，供水行业和公众越来越感兴趣 配水系统中的水质。相应地，美国的环境 美国环保局（USEPA）一直在制定标准，将注意力集中在产品质量上 除了强调饮用水质量的历史标准外，客户的水龙头上还有水 离开水处理厂的水。尤其是第2阶段消毒副产品规则 （DBPR）将要求水资源供应商关注分配中所有点的水质 系统 本文讨论了与第2阶段初始配电系统评估相关的指南 （IDSE）合规性，以及对整体水质的配水系统建模的使用 管理和协助遵守法规。本文讨论了 开发复杂系统模型背后的方法论和理论，包括 讨论了最近的两个项目，在这两个项目中，公用事业公司的IDSE使用了这种类型的模型 报告并随后进行系统运行调整。 南卡罗来纳州查尔斯顿水系和北卡罗来纳州卡里镇都发现了 利用他们之前的投资开发水力模型的价值，这些模型经过了改进 使用密集的行程时间校准，以超过IDSE的要求。 模型 随后可用于实施系统操作协议，以改善水质。这些 操作实践包括系统油箱加注/排放操作、系统泵送效率 运行、冲洗程序、应急响应和对其他系统水质的响应 问题。包括表格、数字。

In recent years, the water supply industry and general public have become increasingly interested in the quality of water in distribution systems. Correspondingly, the U.S. Environmental Protection Agency (USEPA) has been developing standards that focus attention on the quality of the water at the customer's tap, in addition to their historical standards that emphasize the quality of water leaving water treatment plants. In particular, the Stage 2 Disinfection Byproducts Rule (DBPR) will require water purveyors to focus on water quality at all points in the distribution system. This paper discusses guidance related to Stage 2 Initial Distribution System Evaluation (IDSE) compliance, and use of distribution system modeling for overall water quality management and assistance with regulatory compliance. The paper discusses the methodology and theory behind developing a sophisticated system model, and includes discussion of two recent projects in which this type of model was used for the utilities' IDSE report and subsequently for system operational adjustments. The Charleston Water System, South Carolina, and Town of Cary, North Carolina, both found value in using their previous investment in developing a hydraulic models, which were refined using intensive time-of-travel calibration to exceed the requirements of the IDSE. The models can be subsequently used to implement system operating protocols to refine water quality. These operating practices include system tank fill/drain operations, efficiency of system pumping operations, flushing programs, emergency response, and response to other system water quality issues. Includes tables, figures.