Published June 1, 2019 | Version v1
Journal article Open

Assessing the Co-Benefits of green-blue-grey infrastructure for sustainable urban flood risk management

  • 1. Department of Environmental Engineering and Water Technology, IHE-Delft, the Netherlands
  • 2. Department of Water Engineering, IHE-Delft, the Netherlands
  • 3. Centre for Water Systems, College of Engineering, University of Exeter, United Kingdom

Description

Green-blue infrastructures in urban spaces offer several co-benefits besides flood risk reduction, such as water savings, energy savings due to less cooling usage, air quality improvement and carbon sequestration. Traditionally, these co-benefits were not included in decision making processes for flood risk management. In this work we present a method to include the monetary analysis of these co-benefits into a cost-benefits analysis of flood risk mitigation measures. This approach was applied to a case study, comparing costs and benefits with and without coJournals & Books Create account Sign in a b c, d a a Get Access Share Export Previous Next benefits. Different intervention strategies were considered, using green, blue and grey measures and combinations of them. The results obtained illustrate the importance of assessing cobenefits when identifying best adaptation strategies to improve urban flood risk management. Otherwise green infrastructure is likely to appear less efficient than more conventional grey infrastructure. Moreover, a mix of green, blue and grey infrastructures is likely to result in the best adaptation strategy as these three alternatives tend to complement each other. Grey infrastructure has good performance at reducing the risk of flooding, whilst green infrastructure brings in multiple additional benefits that grey infrastructure cannot offer.

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Assessing the Co-Benefits of green-blue-grey infrastructure for sustainable urban flood risk management - ScienceDirect (1).pdf

Additional details

Funding

RECONECT – RECONECT- Regenarating ECOsystems with Nature-based solutions for hydro-meteorological risk rEduCTion 776866
European Commission