Analysis Of Water Leakage In Shenyang Water Supply Pipe Network And Study On Countermeasures To Reduce Water Leakage

Water supply system is an important basis for the development of urban construction and people’s normal life.Now the water supply enterprises have controlled the calculation method of the water production and marketing difference,which is the difference value between the total water supply that the water supply enterprises provide to urban water supply system and the total consumption value of users’usage.Water production and marketing difference is an important indicator to measure water supply system.However,the water supply enterprises still don’t control the reasons for the water production and marketing difference and the relationship of these reasons.Therefore,the study on this field has already become an important project for the water supply enterprises.The paper is based on the research of the historical documentations as well as the basis of the testing data,through the leakage testing measure on the two typical urban water supply networks and water consumption testing in resident community,divide the water production and marketing difference into:Water leakage rate in urban water supply network and its infrastructures;Water leakage rate in the secondary water supply network system;Water consumption of the water supply network system;Firefighting water;Lost water in the marketing filed and public water;Free water.This paper consists six sections and 18 subsections and is calculated according to the formulation and compares the results of the water production and marketing differences by decomposition and calculation,the final comparison is approximate which means the composition of the water production and marketing difference is reasonable.In the reasons,the leakage loss of the urban water supply and the secondary water supply network is 82.79 percentage of the water production and marketing difference,which is a very critical.Once the there’s leakage in urban water supply network,the leakage is obvious and easy to find out,however,the leakage in the secondary water supply network,due to the loss water volume is small,is not easy to find out,therefore,changing the internal network pipeline is urgent.Shenyang water supply enterprise set up the Shenyang resident communities’water supply network and pump station reconstruction project in the year of 2017.The enterprise plans to reconstructure approximate 400 resident communities,6700buildings and the whole project stared from April 1^stt and will end at the end of the year.Before the reconstruction,the pipeline of the Pinganxi resident community,HP district is cast iron and its water production and marketing difference is 72.65%,after the reconstruction,the pipeline is PPR and its water production and marketing difference is 25.76%,decline 46.89%.The old cast iron pipelines are aging and the leakage of the internal network is serious,so it’s not worth repairing.The overall change of internal network pipelines,which change the 2^ndfactor,can decline the water production and marketing difference by 46.89%,that means the 2^ndfactor takes crucial role,and it also provides a useful reference for water supply enterprises to reduce the water production and marketing difference,improve the social and economic benefits and the quality of the water supply service.