Assessment of swmm approaches to simulate dynamic conditions in stormwater systems
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Data
2019-06-26Primeiro coorientador
Vasconcelos Neto, José Goes
Primeiro membro da banca
Hodges, Ben R.
Segundo membro da banca
Pinto, Leandro Conceição
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Mostrar registro completoResumo
The representation of physical phenomena by mathematical and computational models
have evolved in recent years due to technological and computational advances.
Hydraulic modeling has been used for engineers and decision-makers to provide
reliable solutions for many engineering problems. The Storm Water Management
Model (SWMM) is one of the most used and established models worldwide. This
model has been used extensively since the mid-1970 for many engineering applications
such as the representation of the hydrology and hydraulics of urban stormwater
systems. However, modeling complex hydraulic processes such as rapid inflow in
collection systems, mixed flows or transients can produce many types of instabilities
that SWMM does not properly simulate. These instabilities can be reduced by
selecting a proper routing time-step and shortening the conduits length. Also, the
last SWMM version released (5.1.013) implemented the Preismann Slot (SLOT) as
pressurization algorithm and this new feature introduced new possibilities of modeling
such phenomena. Therefore, this work aims to improve SWMM hydraulic modeling
by adopting artificial spatial discretization and verifying the best surcharge method
and routing time-step to simulate dynamic situations. The results showed that the
SWMM hydraulic modeling capacity was significantly improved and able to simulate
extreme hydraulic phenomena such as rapid inflows and slow and fast transients when
artificial spatial discretization is adopted along proper selection of routing time-step
and surcharge method. As a result of this work, a software called ReSWMM that reads
SWMM input files, adds the artificial discretization and estimates appropriate routing
time-steps was developed.
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