中文摘要：

无负压设备直接与市政管网相连接,设备的运行和安全管理状况直接影响到整个供水管网的运行安全。一旦无负压设备超量取水、运行异常或是系统参数设置不合理,就有可能导致泵站上游、邻近用户和下游用户局部的供水不足。应用管网平差软件针对无负压泵站和管网进行建模和平差计算,并根据数值结果对管网的供水不足进行了预测分析,结果表明：管网的水力分析可实现供水不足的预测,并与实际维修记录相符。

英文摘要：

Because the direct connection of the no-negative-pressure facility with the municipal water distribution system,the safety of water supply of the whole pipe networks is influenced by the performance of the no-negative-pressure facility and the level of the management.Excess intaking water,abnormal operation and systemic parameter setting failure,and so on,will result in the water supply shortages both in the upper reaches and lower reaches of the pumping station.In this paper,the software of Flowmaster has been applied in network adjustment calculation based the GIS data for the pumping stations with no-negative-pressure facility and pipe networks to predict the water supply shortages.The results show that prediction of water supply shortages can be achieved based on hydraulic analysis,and the simulated data is accorded with the maintenance records.