加拿大国家研究委员会（NRC）最近完成了一个项目，以协助魁北克省蒙特利尔市确定其供水和下水道系统的状况。NRC工作人员审查了这两个系统的可用和未来诊断技术；进行了腐蚀监测、闭路电视检测和机械检测方法的实验；并在项目过程中提供一般科学建议。本文介绍了金属和预应力混凝土管道诊断技术的回顾结果。 讨论了水审计和泄漏检测等老技术，以及声发射监测和远程场效应检测等新方法。列出了每种技术的优缺点，并提出了将这些技术结合起来对水系统进行全面诊断的方法。包括40个参考文献、表格和图表。

The National Research Council Canada (NRC) recently completed a project to assist the city of Montreal, Quebec, in determining the condition of its water and sewer system. NRC staff members reviewed available and future diagnostic techniques for both systems; conducted experiments on corrosion monitoring, closed circuit television inspection, and mechancial inspection methods; and provided general scientific advice during the course of the project. This article describes the results of the review of diagnostic techniques for metallic and prestressed concrete pipes. Both older techniques such as water audits and leak detection and new approaches such as acoustic emission monitoring and remote-field-effect inspection are discussed. Advantages and disadvantages of each technique are tabulated, and approaches are suggested for combining the techniques to diagnose a water system completely. Includes 40 references, tables, figures.