讨论了研究的目的 本文就是利用商业 配电系统建模 了解软件如何 饮用水系统可能 受有意介绍的影响 化学污染物。 水力模型的结果用于估计几个项目所涉及的风险 饲料和化学污染物。 模型结果如下: 然后结合常规的浓度-反应敏感度数据 监测仪器，以确定 每种化学污染物的能力 待检测。因为 研究了四种化学物质——对硫磷， VX，单氟乙酸钠 （1080）和氰化物——都是建模的 他们的比较 影响取决于 最高实际毒性 剂量 建模场景的结果 表明大规模污染 饮用水系统 可以通过回流来实现 进入主要供水网络 线战略位置点 主要补给线以外的攻击 生产线也可以生产大规模的产品 低浓度污染。 随机选择的点用于 内部秘密污染攻击 分配系统将以最佳方式运行 影响几个相邻的区域 街道面积达1平方英里，具体取决于 管道速度和流型 在分配系统中也是如此 以及其他因素。本期的扩展摘要简要回顾了研究结果；有关研究结果的完整讨论，请访问www.awwa。org/communications/e-journal/index-pass-issues/2005/1月。包括12篇参考文献。

The objective of the study discussed in this article is to utilize commercial distribution system modeling software to understand how a drinking water system could be affected by the intentional introduction of chemical contaminants. The hydraulic model results are used to estimate the risk involved in several feed scenarios and chemical contaminants. The model results are then combined with concentration-response sensitivity data from routine monitoring instruments to determine the ability of each chemical contaminant to be detected. Because the four chemicals studied -- parathion, VX, sodium monofluoroacetate (1080) and cyanide -- are modeled as highly persistent, their comparative effects are determined by the toxicity of the highest practical dosage. The results of the modeling scenarios show that large-scale contamination of a drinking water system may be accomplished through backflow into major network water supply lines. Strategically located points of attack outside of the major supply lines can also produce large-scale contamination at lesser concentrations. Points chosen at random for a covert contamination attack within the distribution system will optimally affect an area of a few neighboring streets of up to 1 sq mi, depending on the pipe velocities and flow patterns within the distribution system as well as other factors. The Expanded Summary in this issue offers a condensed review of study findings; a full discussion of the study results can be found online at www.awwa.org/communications/e-journal/index-past issues/2005/January. Includes 12 references.