随着水流经配水系统，监管力度的加大引发了人们对水质恶化的担忧。已经采取了几种方法对这种现象进行数值模拟。本文提出了一种分析水质动态分布的替代方法。一般非保守成分的移动之后是前沿跟踪方法。该方法同时考虑了流动反转和变化的稳态需求。前沿跟踪消除了数值色散，这是其他建模方法固有的。在配备数学协处理器的IBM 80386计算机上，在不到13秒钟的时间内，解决了41个管道系统，其中包括一个源、一个罐和55个1小时的需求模式。概述了描述氯与三卤甲烷化学反应的方程式，以及操作应用的其他扩展。

Increased regulation has spurred concern over the decay of water quality as water moves through the distribution system. Several approaches have been taken to numerically model this phenomena. An alternative approach for analyzing the dynamic distribution of water quality is presented in this paper. The movement of a general nonconservative constituent is followed by a front tracking approach. Both flow reversal and varying steady state demands are considered by this approach. Front tracking eliminates numerical dispersion which is inherent in other modeling approaches. A forty-one pipe system with one source, one tank, and 55 1-hour demand patterns has been solved in less than 13 seconds on an IBM 80386 computer with a math coprocessor. The equations describing the chemical reaction of chlorine to THMs are outlined along with other extensions to operation applications.