Urban Flood Risk Mitigation model - Green infrastructures implementation

Hello everyone,

In relation to the Urban Flood Risk Mitigation model, since I work with different scenarios, I would like to know how you think to implement a green solution and include this in the model. I mean, if I imagine implementing a bio-swale, what I will have to change in the data input? I thought to the Hydrological curve numbers, but I would like to have your feedback on that because you have developed this model and of course you know the best way to do it.

Thank you.

Best regards,

A scenario using bioswales would be represented by changing the Land Use/Land Cover map. Make sure that your LULC input resolution is high enough to capture differences between scenarios: if you add a 5 meter wide bioswale, that will not be represented accurately in a 30 meter resolution raster. All other inputs are resampled to the LULC pixel size.

  • LULC: Make an edited version of the baseline LULC to represent your scenario. Mark the proposed bioswales as a new (or existing) LULC class.
  • Biophysical table: If bioswales are a new LULC class, add a row to the biophysical table for that class.
  • Built infrastructure vector: If the bioswales are replacing any building infrastructure, update the built infrastructure vector accordingly.
  • Watershed vector: does not change, unless your bioswale significantly modifies where water will flow
  • Rainfall depth: does not change
  • Soil hydrologic groups: does not change
  • Damage loss table: does not change