Abstract
The analysis of water losses should precede the decisions on repairing or modernizing a water network. Water balance and water losses indicators established by the International Water Association (IWA) standards can constitute the basis for the analysis. The methods recommended by IWA are gaining increasing popularity in many countries, including Poland. The aim of the paper is the analysis and comparison of water losses in two middle-sized water distribution systems during the period of 10 years. The compared networks are similar in respect to many parameters, including water intensity indicator value (circa 48 m3 /d/km). Analyses were conducted on the basis of water losses indices recommended by IWA, such as Real Losses Level per connection per day (RLL ), Non-Revenue Water Level (NRWL ) and Infrastructure Leakage Index (ILI ). The results indicated that water losses in both systems are lower than in the literature data for other similar networks.
Highlights
The problem of water losses in distribution systems is one of the main concerns of the water systems managers both in Poland and around the world
The results indicate an improvement in the managing the system of town B after 2007, which was confirmed by the system operator and involved, i.a., reduction of the operating pressure
Average values of the calculated performance indicators were higher in the case of town A, but both can be classified as systems which do not require a further loss reduction according to WBI Loss Target Matrix
Summary
The problem of water losses in distribution systems is one of the main concerns of the water systems managers both in Poland and around the world. It is commonly known that real losses are caused mainly by leakages as a result of water network breakages and failures. It is not surprising that many scientists use the most recent technological and scientific developments to work out efficient methods for limitation of failures and their results [e.g. 1–8]. International Water Association (IWA) proposes four methods of leakage management [9]: Active Leakage Control, Pipeline and Assets Management, Speed and Quality of Repairs and Pressure Management. An analysis of water losses in a distribution system on the basis of the IWA balance should be an integral part of the management and should precede the decisions on repairing or modernizing a water network
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
