城市,特别是大城市,是人口聚集、政治、经济发达的地区,对水的需求量很大。供水设施的建设,是城市基础设施建设之一。城市对供水的需求是不间断的,但供水却往往会受到自然和人为因素的影响,可能会造成中断。为确保城市供水安全,使城市始终 Cities, especially the big cities, are populated, politically and economically developed areas with great demand for water. Water supply facilities construction is one of the city’s infrastructure. Demand for water in cities is uninterrupted, but water supply is often subject to natural and human factors that could cause disruptions. To ensure the safety of urban water supply, make the city always