Strategy Of The Technology Of Water Loss Control In Urban Water Supply System

Urban water supply pipe network leakage rate is needed to solve urgent problems of water supply enterprises,at present most of the water supply enterprise leakage rate is higher than the industry regulations of 12%.project and systematic analysis of the water supply network of non revenue water management(NRW),the International Water Association(IWA)based on non revenue water control strategy,the implementation process of non revenue water components,technical measures,management measures and performance indicators,and on the basis of the pilot application,and actively explore the comprehensive means of economic and effective,the level of leakage of water supply enterprises to meet industry standards,and establish a long-term mechanism and early warning monitoring necessary.Through the introduction,exploration,practice and summary.The first comprehensive application in domestic and International Water Association(IWA)of the water supply network of non revenue water management strategies,methods and processes,refine,integration and improvement,the formation of key technologies leakage control,and be used in practice.Compared with the leakage control strategy differences,put forward four key technologies of network key the use of non revenue water management: water balance,performance evaluation,DMA management and pressure control,through the application of the pilot water balance and performance evaluation is the premise of leakage control,driving force and the target partition;measurement technology,night minimum flow analysis,optimal scheduling pressure is an important technical means for the real conditions for the leakage control.According to the evaluation standard of the domestic leakage,only based on the current situation of poor sales and the leakage rate of the two indicators,this project is to clarify the relationship of poor sales and the leakage rate(the leakage rate is less than the difference of poor sales,is not legitimate,water charges category)put forward evaluation index system of leakage(covering basic,intermediate and senior index).The first recommendation of non revenue water leakage assessment,and not just the leakage rate the percentage(percentage of interference calculation model is vulnerable to changes in water);senior indicators need to consider the network situation,pressure and factors such as the number of users connected;under certain conditions,the recommended calculation and international standards of water supply network leakage index(ILI),and the control index,the world bank organization providing objective matrix to determine the water supply system leakage classification categories,so as to formulate the corresponding leakage control measures,the final shape A performance evaluation system of urban water supply system leakage based on the actual situation of our country.