In this step different alternatives for dealing with flood risk will be modelled and the output will be presented in the form of hazard and risk maps, which will be presented in the sub-tab Risk Assessment. The alternatives will be evaluated according to the objectives defined in Step 1. The results will be presented in the sub-tab Evaluation of Alternatives.

The contents of this subtabs are not available yet; they will be available for the second workshop.

Some individual flood management and mitigation measures are initially proposed and summarised in the table below. However, participants are encouraged to suggest new individual measures and combinations of measures (if you wish to provide comments about flood management measures, click here to access the Feedback section of the platform).

 

 

Proposed Alternatives for Managing Flood Risk in Redbridge

Click on each measure to access the explanation:

Proposed Management Measures
Type of Measure
Description
Baseline measure
This will be used as base point for comparing and assessing the performance of the proposed measures
  • Mitigation measure at source level

  • Structural measure
It will reduce runoff or flow entering the system. Rainwater harvesting has been selected as one of the few SUDS that can be retrofitted to the existing residential built‑up area.
  • Mitigation measure at pathway level

  • Non-structural measure
After identifying locations which are at greatest risk of flooding, targeted maintenance at the critical points can be carried out.
  • Mitigation measure at receptor level

  • Non-structural measure
Resistance measures prevent water from entering the property. It is useful for managing residual risk. In this case, the effect of sandbags or flodsax will be modelled and analysed.
  • Mitigation measure at receptor level

  • Non-structural measure
With the technology we are currently developing, it will be possible to provide site specific real time rainfall and surface water flood forecast. This could be integrated with the Environment Agency warning system, so that improved warnings for surface flooding can be timely issued.