Urban water systems are composed of subsystems (gully pots, storm sewers
and surface water), each with its own system dynamics. Engineers balance
the functioning of the systems based on storage and discharge capacity
of the subsystems. The load on, and capacity are influenced by e.g.
ageing, urbanization, climate change. Consequently, the performance of
and demand put on subsystems varies over time, potentially resulting in
disturbances in the balance between the storage and discharge capacity
of the subsystems. The Graph Based Weakest Link Method (GBWLM) is
developed to analyse the behaviour of urban water systems to identify
potential limitations due to deterioration, and/or changes in load. The
proposed GBWLM is based on the structure of the networks. In addition,
Graph theory is applied as alternative for series of hydraulic
calculations. The GBWLM allows for an integrated performance assessments
of urban water systems using multi-decades rainfall series. The results
are sufficiently accurate to be able to determine the extent and
frequency of urban flooding in order to compare the performance of the
subsystems for various degrees of available discharge capacity. Keywords
Criticality, flow paths analysis, Graph theory, linearised
hydrodynamics, urban water systems, Weakest Link Method Highlights 1.
Method for the analysis of urban water systems based on Graph theory 2.
The use of linearised hydrodynamics in flow path analyses