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Sewer System Rehabilitation Project of a Urban Basin using EPA SWMM 5.0

Sewer System Rehabilitation Project of a Urban Basin using EPA SWMM 5.0. Remediation measures on sewerage system. Methodology Presentation of the study basin Discretization and definition of model parameters Calibration & Validation Effective rain determination

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Sewer System Rehabilitation Project of a Urban Basin using EPA SWMM 5.0

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  1. Sewer System Rehabilitation Project of a Urban Basin using EPA SWMM 5.0 Remediation measures on sewerage system De Giorgis, Juan Alberto (1) Rezende, Osvaldo (2) FICH – Universidad Nacional del Litoral (1) COPPE /UFRJ – Universidade Federal do Rio de Janeiro(2)

  2. Methodology • Presentation of the study basin • Discretization and definition of model parameters • Calibration & Validation • Effective rain determination • Diagnostic of actual drainage capacity • Interventions on network drainage proposal • Conclusions and Recommendations De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  3. Principal Objective Sewer system rehabilitation measures propouses without modification of the network drainage design De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  4. La Riereta Basin – Sant Boi de Llobregat • Drainage Area: 18 Ha • High percentage of impervious areas • High averege surface slopes • Combined sewer system • Conduits with circular seccion • Material: concrete De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  5. Discretization of the basin • Discretization of the basin in 17 subcatchment De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  6. Model parameters • Sub-catchment • Nodes • Conduits • Rain De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  7. De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  8. Calibration & Validation • The model was calibrated with Santa Cecilia event and validated with Elias and Martina events. De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  9. Validation Elias Event and Martina Event De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  10. Sensitivity Analysis • Ccc Roughness ducts (nc), impermeable surface roughness of the basin (ni), and runoff width (W). De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  11. Effective rain determination • The effective rain was designed subtracting a cte rate from hietograph (i = 3.0mm/h). • It can be done because the basin has a very high percentage of impervious surface. De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  12. Project Rain • TR = 10 anos – D = 1 hour – IDF Barcelona - Fabra De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  13. Diagnostic of actual drainage capacity • Links with over-capacity • Flooding volume 2974 m3 • Peak flow = 3.792 m3/ s • vmax < 8 m3/s • vmin > 0.5 m3/s De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  14. Interventions on network drainage proposal • Alternative 1 – simple shift of conduits De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  15. Alternative 1 – Profile results De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  16. Interventions on network drainage proposal • Alternative 2 – shift of conduits - Retangular De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  17. Alternative 2 – Results Profile De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  18. Interventions on network drainage proposal • Alternative 3 – Parallel Drainage line De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  19. Alternative 3 – Profile Results De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  20. Conclusions and Recommendations • As shown above, all 3 alternative are effective in terms of hydraulics efficiency. • Alternatives 2 and 3 require a greater investment than alternative 1 • Need of further evaluation in terms of structural, operational and environmental issues to achieve an integrated rehabilitation plan. • How can this intervention affect downstream? • Qproject = 5.048 = 1.33Qactual De Giorgis, Juan Alberto Rezende, Osvaldo Moura

  21. Muchas Gracias!!! Muito Obrigado!!! Thank you all.... De Giorgis, Juan Alberto Rezende, Osvaldo Moura

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