Identification of critical pipes in a drinking water distribution system
Date
Authors
Type
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Model builders
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The aim of this master thesis is to identify the most critical pipes in a drinking water
distribution system through hydraulic modelling. The criticality of a pipe will be
based on the consequences of pipe breakage including the affect on the supply of
valuable users.
Reliability will be seen as the ability to supply the quantitative demand
to the households and valuable users at any time and to identify the criticality of
a pipe, the pipe´s contribution to the system reliability has been evaluated. The
contribution are estimated by evaluating the results from hydraulic simulation of
the drinking water system, without the investigated pipe. Four indices, demand,
affected users, time and valuable user index as well as a gathered criticality index
are used to estimate the reliability of a drinking water system.
To give more substance of the identification of critical pipes the reliability
requirements of a drinking water distribution system could be further evolved. When
determining the criticality of the pipes in the system, one key aspect is how pipes
with different patterns should be compared between each other. Pressure driven and
demand driven approach gave the same results for the majority of the pipes and a
risk-based approach including probabilities would give a more in depth analysis of
the criticality.
Description
Keywords
Drinking water, Distribution system, Reliability, Critical pipes, Valuable users