Seasonality analysis of water losses in a selected collective water supply system

Jakub Żywiec,Barbara Tchórzewska-Cieślak,B Kaźmierczak,M Kutyłowska,P Jadwiszczak,U Miller

doi:10.1051/e3sconf/201910000094

Jakub Żywiec, Barbara Tchórzewska-Cieślak + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/201910000094

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Abstract

The aim of the study is to analyse the seasonality of water losses from a collective water-supply system (CWSS) on the example of a provincial city located in south eastern Poland. The analysis was based on exploitation data obtained from the water-supply company for the period 2012–2016. For the analysis of seasonality a method based on average homogeneous sub-periods was used, with a relative seasonality index and the absolute levels of seasonal fluctuations being determined. Water losses from the analysed CWSS are also characterised using unit water-volume indicators within the water supply network. Over the research period, the volume of water produced and sold was found to decline, even as the number of inhabitants using the network increased. On the other hand, there is a growing demand for water used for own purposes by company, as related directly to their development. Water losses and values determined for the water-loss volume indicator both show a downward trend for the analysed CWSS. It is further observed that, in January, March and May, the loss of water is above average, while the volume of water lost in the other months is below average.

Highlights

Ongoing climate change requires the management of natural resources to be both rational and economical
Such losses of water can be classed as [5]: apparent losses or real losses. 80–100% of total losses are reflected by real losses [4], in particular those relating to pipeline failures
As water losses from a water-supply network should be minimised to a level that is optimal, the phenomenon requires deep, multifaceted analysis

Summary

Introduction

Ongoing climate change requires the management of natural resources to be both rational and economical. Such losses of water can be classed as [5]: apparent losses (resulting from inaccuracies of measurement devices and measurement inconsistencies, and the theft of water) or real losses (as the sum of water lost in reservoirs, water connections and via leaks, due to failures of mains and distribution-network pipelines). The current trend is to determine an optimal level of losses, a process that entails complicated economic analysis including costs: of producing and distributing water, of active monitoring of the network, and of removing leaks, as well as the resource and environmental costs of water being wasted [5, 6, 10–12]

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