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Alternative Drainage Techniques : Infiltration. Team 3 Ariel Marcelo Ravelli (Argentina) Lina Mabel (Chile) Vinícius de Mello Moutinho (Brasil). Theme Presentation Case of Study Rain and Modeling Adopted Solution Results. Theme Presentation. Drainage Alternative Forms Trenches

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Alternative Drainage Techniques : Infiltration

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Alternative Drainage Techniques : Infiltration

Team 3

Ariel Marcelo Ravelli (Argentina)

Lina Mabel (Chile)

Vinícius de Mello Moutinho (Brasil)


  • Theme Presentation

  • Case of Study

  • Rain and Modeling

  • Adopted Solution

  • Results


Theme Presentation

  • Drainage Alternative Forms

  • Trenches

  • Storage Rooftops

  • Permeable Pavement

  • Infiltration Basins


Case of Study

La Riereta basin, Saint Boi Llobregat

Basin 100% impermeable

1% to 7% average slopes

Area of 18 ha

Unitary Drainage System


[1] These subcatchments had it´s width calculated as symmetrical, W= 2*L, while the others were calculated as asymmetrical, W=(2 - Sk) x L, Sk= (A2 – A1)/ A

Subcatchments Features


Rain and Modeling


Rain and Modeling

3 Rains: Jordi, Fidel and Martina


Rain and Modeling

Calibration : Fidel

First Round

Last Round


Rain and Modeling

Validation : Jordi

Error: peak: 0.4% volume: 34%


Project Rain


Project Rain

Full Rain

Reduced Rain


Local Problem


Solutions

  • Reduce Impermeable Area

  • Combined Solution


Solutions

  • Reduce Impermeable Area from 100% to 0%


Solutions

  • Combined Solution

  • Imper. Area – 60%

  • CN – 60

  • Infiltration Basin

  • Shallow Trenches


Solutions


Solutions

Total Volume Reduction : 88%


Conclusions

100% to 0% we still had a flood, an amount of 0.46% of the inicial flood.

Combined solution, we were able to reduce the soil impermeability from 100% to 60%, and using the infiltration basin and the trenches, we reduced the total flood from 1.896 x 106 to only 0.230 x 106 ltrs, a total reduce of 88%


Problems

Good Management Required


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