The article addresses the results of effective water losses prevention in public water supply systems, focusing on procedures for monitoring hidden leaks as the main part of losses and as the first step to control and...The article addresses the results of effective water losses prevention in public water supply systems, focusing on procedures for monitoring hidden leaks as the main part of losses and as the first step to control and prevent them. The described methodology has been applied based on a cross-border cooperation between twin capital cities Vienna and Bratislava in the Central Europe Region within the project deWaloP （Developing Water Loss Prevention） and adopted in Bratislava Water Company （BVS） in the Slovak Republic. The paper provides a complex of simple and easily available practices for analyses of water distribution measurements bringing essential information as to the necessity to use advanced procedures to actively reduce leakage. These practices involve minimum night flows analyses, hydrodynamic pressures analyses, pinpointing of water leakages by working with valves in the water network, the methodology of setting alarm limits for measured data, as well as use of advanced practices to obtain missing topologic data. As the water infrastructure in former socialistic countries are in bad technical condition and the lack of pertinent operational data is a significant obstacle to the application of a more sophisticated methodology based on GIS and other information systems, the procedures focus on using the most simple way to evaluate and control water losses. Finally, the introduction of described methodology in Bratislava Water Company after many years of unsuccessful effort even with expensive sophisticated leakage equipment brought positive outputs and the graph line of water losses level is finally going down. The use of expensive multi-correlating equipment together with human resources on the basis of implementing the above described leakage monitoring will subsequently become more effective, as it shall pinpoint major leakages, disclosure and removal of that shall significantly contribute to the effective reduction of water losses.展开更多
采用夜间最小流量(MNF)法对300个DMA小区的漏损管理进行综合运用,结果显示:对于DMA小区的存量漏失,可以采用MNF定额法和比例法进行综合判定;对于DMA小区的新增漏失,可以采用新增MNF值或者新增MNF比例值对比历史数据进行判定,但必须用流...采用夜间最小流量(MNF)法对300个DMA小区的漏损管理进行综合运用,结果显示:对于DMA小区的存量漏失,可以采用MNF定额法和比例法进行综合判定;对于DMA小区的新增漏失,可以采用新增MNF值或者新增MNF比例值对比历史数据进行判定,但必须用流量分布法辅助判断。应用实践表明,MNF法在DMA小区漏损管理中的综合运用非常有效,2021年7月到2022年6月近1年里共发现37个小区暗漏,每年节约水量3187728 m 3,显著节省了水费和二次供水泵房电耗。展开更多
文摘The article addresses the results of effective water losses prevention in public water supply systems, focusing on procedures for monitoring hidden leaks as the main part of losses and as the first step to control and prevent them. The described methodology has been applied based on a cross-border cooperation between twin capital cities Vienna and Bratislava in the Central Europe Region within the project deWaloP （Developing Water Loss Prevention） and adopted in Bratislava Water Company （BVS） in the Slovak Republic. The paper provides a complex of simple and easily available practices for analyses of water distribution measurements bringing essential information as to the necessity to use advanced procedures to actively reduce leakage. These practices involve minimum night flows analyses, hydrodynamic pressures analyses, pinpointing of water leakages by working with valves in the water network, the methodology of setting alarm limits for measured data, as well as use of advanced practices to obtain missing topologic data. As the water infrastructure in former socialistic countries are in bad technical condition and the lack of pertinent operational data is a significant obstacle to the application of a more sophisticated methodology based on GIS and other information systems, the procedures focus on using the most simple way to evaluate and control water losses. Finally, the introduction of described methodology in Bratislava Water Company after many years of unsuccessful effort even with expensive sophisticated leakage equipment brought positive outputs and the graph line of water losses level is finally going down. The use of expensive multi-correlating equipment together with human resources on the basis of implementing the above described leakage monitoring will subsequently become more effective, as it shall pinpoint major leakages, disclosure and removal of that shall significantly contribute to the effective reduction of water losses.
文摘采用夜间最小流量(MNF)法对300个DMA小区的漏损管理进行综合运用,结果显示:对于DMA小区的存量漏失,可以采用MNF定额法和比例法进行综合判定;对于DMA小区的新增漏失,可以采用新增MNF值或者新增MNF比例值对比历史数据进行判定,但必须用流量分布法辅助判断。应用实践表明,MNF法在DMA小区漏损管理中的综合运用非常有效,2021年7月到2022年6月近1年里共发现37个小区暗漏,每年节约水量3187728 m 3,显著节省了水费和二次供水泵房电耗。
