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Analysis of the width of protection zone near a water supply network

Iwanek Małgorzata, Suchorab Paweł, Sidorowicz Łukasz

Architecture Civil Engineering Environment

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2019

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Vol. 12, no. 1

123--128

EN

A protection zone near the water supply network belongs to the proposals of limiting negative results of potential breakages of buried water pipes. Water leaking from a damaged pipe can create swallow holes or hollows, dangerous especially in the urban areas. The proposed zone is an area on the soil surface along a buried water network, where the outflow of water could be expected after a potential failure of the pipe. The infrastructure in this zone should be carefully planned to limit the social, economic and environmental costs in the case of leakage. The investigations included laboratory tests of a buried water pipe breakage for different cases of leak areas and values of hydraulic pressure head in a pipe as well as analysis of the obtained results and determination of a protection zone for the investigated cases on the basis of tolerance limits. The calculated values of the zone width (5 m if operating pressure is lower than 0.4 MPa, and 7 m otherwise) occurred high, mainly because of the high dispersion of the laboratory tests results. Moreover, we recommended the values of tolerance level to be assumed in calculations.

2

An integrated searching algorithm for the water network structure with minimal water consumption and wastewater generation

Gabriel U., Szaniawska D.

Polish Journal of Chemical Technology

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2006

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Vol. 8, nr 3

135-137

EN

The paper presents an integrated algorithm for water management analysis enabling the retrofit of existing water network structures both within the feeding subsystem and the treatment subsystem including water regeneration of selected streams. The aim of the developed algorithm is to minimise the fresh water use and wastewater generation. The algorithm worked out by authors consists of three stages. The first and the second stage concerns the water streams allocation within the feeding subsystem and the third one is related to water allocation within the treatment subsystem. The first stage determines possibilities of direct reuse and the second stage defines possibilities of mixed streams reuse applying the ,,nearest source concept". Within the treatment subsystem possibilities of water regeneration of the streams selected according to the pinch point determined analytically are analysed. The third stage includes the selection of suitable treatment options for the specified streams. An advantage of the algorithm is the possibility of applying it to both contaminant-transfer and non contaminant-transfer processes. It also includes mixing options giving the minimal water use. By expanding analysis into the treatment subsystem and including water regeneration possibilities derives benefit in additional water savings can be obtained.

3

Zastosowanie procedury algorytmicznej do modyfikacji struktury sieci wodnej w celu minimalizacji zużycia wody i zrzutu ścieków

Gabriel U., Szaniawska D.

Inżynieria Chemiczna i Procesowa

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2004

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T. 25, z. 3/1

871-876

PL

W publikacji opisano opracowany algorytm oraz wyniki uzyskane przy jego zastosowaniu do analizy wybranej struktury sieci wodnej. Algorytm ten eliminuje ograniczenia metod opartych na modelu wymiany masy i umożliwia analizę obu podsystemów: zasilania i oczyszczania.

EN

The paper describes developed algorithm and the results obtained with its use for analysis of chosen water network optimised for the purpose of freshwater conservation and wastewater minimisation. The algorithm eliminates limitations of methods based on mass-transfer model and enables to analyse both supply and treatment subsystems.