Multihydro

Lesson

Introduction
Introduction
Model presentation
Input data
Green roof module
Demonstration at the basin scale
- Study at the basin scale 1
- Geographical and technical data
- Basin
- Geographical data on AsimTool platform
- Sewage network
- Multi-Hydro implementation
- Some rainfall events
- Multi-Hydro simulations
Presentation of the results
Conclusions and perspectives
Application
Source

Multi-Hydro simulations

Multi-Hydro simulations have been carried out for every rainfall event.

For each event, 4 scenarios have been tested:

One representing the current situation (industrial buildings are covered by impervious roofs)

Three taking into account the implementation of green roof with different initial state of substrate saturation:
- 10%
- 30%
- 50%

Obtained results have been assessed by two indicators representing the reduction in terms of runoff volume (ΔV) and peak discharge (ΔQp):

$\Delta Qp(\%) = \frac{Qp_{imp} - Qp_{gr}}{Qp_{imp}} \times 100 \quad \quad \Delta V(\%) = \frac{V_{imp} - V_{gr}}{V_{imp}} \times 100$

Where Qp_imp and V_imp refer to peak discharge and runoff volume computed for the impervious situation whereas Qp_gr and V_gr correspond to those computed for the different green roofing scenarios

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