Catastrophic collapse of water supply reservoirs in urban areas
Christopher Zoppou and Stephen Roberts
Abstract:
A model based on the finite volume method combined with a first-order
approximate Riemann solver is used to solve the two-dimensional shallow
water wave equation on an unstructured triangular grid. Verification of
the
model is achieved by comparing the model results with analytical
solutions
as well as documented published results with very good agreement. The
model
is applied to a case study involving the sudden collapse of a water
supply
reservoir. These reservoirs are generally located in elevated positions
in
residential areas and represent a potential risk to life and property.
The
model is used to predict the progress of the flood ensuing from the
instantaneous collapse of a water supply reservoir. The model is
conservative, robust, efficient, capable of simulating the wetting and
drying processes, resolves shocks, simulates flow around complex
geometry
and obstacles and includes the influence of steep bed slopes and
friction.
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