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Alternative Drainage Techniques : Infiltration Team 3 Ariel Marcelo Ravelli (Argentina) Lina Mabel (Chile) Vinícius de Mello Moutinho (Brasil)

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Presentation on theme: "Alternative Drainage Techniques : Infiltration Team 3 Ariel Marcelo Ravelli (Argentina) Lina Mabel (Chile) Vinícius de Mello Moutinho (Brasil)"— Presentation transcript:

1 Alternative Drainage Techniques : Infiltration Team 3 Ariel Marcelo Ravelli (Argentina) Lina Mabel (Chile) Vinícius de Mello Moutinho (Brasil)

2 Theme Presentation Case of Study Rain and Modeling Adopted Solution Results

3 Theme Presentation Drainage Alternative Forms Trenches Storage Rooftops Permeable Pavement Infiltration Basins

4

5 Case of Study La Riereta basin, Saint Boi Llobregat Basin 100% impermeable 1% to 7% average slopes Area of 18 ha Unitary Drainage System

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8 SubCatchment Total Area (m²) Permeable Area (m²) L (m)Width% per.%imp%slope 19627,97308,34173,56330,933,20%96,80%1,64% 26714,73528,12149,72272,777,87%92,13%1,64% ,5462,82174,72349,440,95%99,05%3,48% ,75151,16266,13473,100,76%99,24%1,54% ,410,00223,07431,950,00%100,00%2,61% ,27690,36152, ,944,98%95,02%3,75% 79769,220,00103,39169,390,00%100,00%0,91% ,6928,19149,67237,820,25%99,75%4,19% ,38121,50154,46247,590,50%99,50%4,26% ,040,00206,32355,790,00%100,00%1,07% ,090,00183,82367,640,00%100,00%3,30% ,801155,76101,39154,6310,53%89,47%1,74% ,352960,82127,58188,3327,35%72,65%5,96% , , ,400,00%100,00%4,42% [1] [1] These subcatchments had it´s width calculated as symmetrical, W= 2*L, while the others were calculated as asymmetrical, W=(2 - S k ) x L, S k = (A 2 – A 1 )/ A Subcatchments Features

9 Rain and Modeling

10 3 Rains: Jordi, Fidel and Martina

11 Rain and Modeling Calibration : Fidel First Round Last Round

12 Rain and Modeling Validation : Jordi Error: peak: 0.4% volume: 34%

13 Project Rain

14 Full RainReduced Rain

15 Local Problem **************************Volume Flow Routing Continuityhectare-m10^6 ltr ************************** Dry Weather Inflow Wet Weather Inflow Groundwater Inflow RDII Inflow External Inflow External Outflow Internal Outflow Evaporation Loss Initial Stored Volume Final Stored Volume Continuity Error (%)

16 Solutions Reduce Impermeable Area Combined Solution

17 Solutions Reduce Impermeable Area from 100% to 0% ************************** Volume Flow Routing Continuity hectare-m10^6 ltr ************************** Dry Weather Inflow Wet Weather Inflow Groundwater Inflow RDII Inflow External Inflow External Outflow Internal Outflow Evaporation Loss Initial Stored Volume Final Stored Volume Continuity Error (%)

18 Solutions Combined Solution Imper. Area – 60% CN – 60 Infiltration Basin Shallow Trenches

19 Solutions

20 Total Volume Reduction : 88% **************************Volume Flow Routing Continuityhectare-m10^6 ltr ************************** Dry Weather Inflow Wet Weather Inflow Groundwater Inflow RDII Inflow External Inflow External Outflow Internal Outflow Evaporation Loss Initial Stored Volume Final Stored Volume Continuity Error (%)

21 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 x 106 to only x 106 ltrs, a total reduce of 88%

22 Problems Good Management Required


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