作者比较了两种数值方法， 一个是基于欧拉的，另一个是基于拉格朗日的 水分配中的水力瞬变模拟 系统。考虑了特征线法（MOC） 是欧拉方法中最精确的 在其对控制方程的表示中， 需要许多步骤或计算来解决问题 典型的瞬态管流问题。波浪特性 方法（WCM），一种拉格朗日方法， 跟踪压力的移动和转换 波动并计算新的条件 间隔或仅在实际发生变化时 发生。WCM需要的数量级更少 压力和流量计算，允许大型系统 以迅速的方式解决。此外 因为该方法在时间和时间上都是连续的 空间，它对网络的结构不那么敏感 并根据模拟过程的长度，得出 提高了计算效率。 结果表明，MOC和WCM 为小型管道系统提供快速准确的结果 短暂的瞬变。然而，WCM是 适用于大型配电网的暂态分析 系统，因为它可以在很小的范围内产生准确的结果 MOC所需的计算时间。 压力瞬变会对质量产生不利影响 由于潜在的污染 与短暂事件相关的病原体。精确的 建模研究可以帮助公用事业管理者确定 充分的浪涌保护，加强了系统的完整性 并最大限度地减少对服务造成的成本高昂的中断。包括24个参考文献、表格和图表。

The authors compared two numerical methods, one Eulerian-based, the other Lagrangian-based, for modeling hydraulic transients in water distribution systems. The method of characteristics (MOC), considered to be the most accurate of the Eulerian methods in its representation of the governing equations, requires a number of steps or calculations to solve a typical transient pipe flow problem. The wave characteristic method (WCM), a Lagrangian approach, tracks movement and transformation of pressure waves and computes new conditions either at fixed intervals or only at times when a change actually occurs. The WCM requires orders of magnitude fewer pressure and flow calculations, allowing large systems to be solved in an expeditious manner. Furthermore, because the method is continuous in both time and space, it is less sensitive to the structure of the network and to the length of the simulation process, resulting in improved computational efficiency. Results indicated that both the MOC and WCM provide fast and accurate results for small pipe systems of short duration transients. However, WCM was superior for transient analysis of large distribution systems because it yields accurate results in a fraction of the computational time required for MOC. Pressure transients can adversely affect the quality of treated water because of potential intrusion by pathogens associated with transient events. Accurate modeling studies can help utility managers determine adequate surge protection, strengthen the integrity of their systems, and minimize costly disruptions to service. Includes 24 references, tables, figures.