Análise da eficiência de métodos de controle de Enchentes na atenuação de picos de cheias utilizando o modelo computacional SWMM Storm Water managemente model
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Data
2007-08-31
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Universidade Federal de Goiás
Resumo
This research presents an evaluation of the eficiency of four flood control measures applied to an
urban basin in the city of Goiânia, State of Goiás, Brazil. Goiânia shows frequent flooding
problems. The following factors have been identified as causes of the floodings: (1) significant
number of impervious areas (2) lack of green areas, (3) insuficient capacity of the pipe network
to convey the produced water volume. Small detention basins, infiltration trenches and the
increase of permeable areas (30-50%) within parcels have been evaluated as flood control
measures as well as the use of the Lago do Bosque dos Buritis as a detention basin. For this
purpose, the Stormwater Management Model SWMM has been applied for evaluating 11
hypothetic management measures in the water basin. The later control measures were evaluated
individually as combined. In determining the impervious area index of the studied area, field
visits have been carried out, which showed high imperviousness. (86.16%). A synthetic rainfall
time series, derived from the equation proposed by Costa e Brito (1999) with recurrence of 2
years, has been used in the simulations. Horton`s equation was applied to represent infiltration
with parameters presented in Moura (2005). The scenario which combines the use of infiltration
trenches and the increase of pervious areas to 50% has shown to be the best solution in reducing
peak flow with 43% eficiency. On the other hand, the scenario using detention basins presented
the smallest efficiency (3%).
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SILVA, Karla Alcione da. Analysis of the efficiency of flood control methods for the attenuation of peak flow using the SWMM - Storm water management model. 2007. 125 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiania, 2007.