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对结构复杂、规模庞大的城市给水系统来说，保证其可靠性对于提高给水服务水平至关重要。长期以来，人们对给水系统可靠性进行的研究多局限在可靠度概念上，仍以结构可靠度思想来把握包括水力可靠性在内的给水系统服务可靠性问题，致使这一领域研究徘徊不前。本文对此进行了研究，提出可靠度概念不适应于开放的复杂系统可靠性的把握问题，应该突破可靠度概念来理解给水系统可靠性问题。
For a complex and large-scale urban water supply system, ensuring its reliability is crucial to improving water service levels. For a long time, the research on the reliability of water supply system has been mostly confined to the concept of reliability, and the problem of service reliability of water supply system including hydraulic reliability is still grasped based on the structural reliability theory. As a result, the research in this field has been stagnant . In this paper, we study that the concept of reliability is not suitable for grasping the reliability of open and complex systems, and we should break through the concept of reliability to understand the problem of water supply system reliability.