Print Email Facebook Twitter Exploring trade-offs among the multiple benefits of green-blue-grey infrastructure for urban flood mitigation Title Exploring trade-offs among the multiple benefits of green-blue-grey infrastructure for urban flood mitigation Author Alves, Alida (TU Delft BT/Environmental Biotechnology; IHE Delft Institute for Water Education) Vojinovic, Zoran (IHE Delft Institute for Water Education) Kapelan, Z. (TU Delft Sanitary Engineering; University of Exeter) Sanchez, Arlex (IHE Delft Institute for Water Education) Gersonius, Berry (ResilienServices) Date 2020 Abstract Climate change is presenting one of the main challenges to our planet. In parallel, all regions of the world are projected to urbanise further. Consequently, sustainable development challenges will be increasingly concentrated in cities. A resulting impact is the increment of expected urban flood risk in many areas around the globe. Adaptation to climate change is an opportunity to improve urban conditions through the implementation of green-blue infrastructures, which provide multiple benefits besides flood mitigation. However, this is not an easy task since urban drainage systems are complex structures. This work focuses on a method to analyse the trade-offs when different benefits are pursued in stormwater infrastructure planning. A hydrodynamic model was coupled with an evolutionary optimisation algorithm to evaluate different green-blue-grey measures combinations. This evaluation includes flood mitigation as well as the enhancement of co-benefits. We confirmed optimisation as a helpful decision-making tool to visualise trade-offs among flood management strategies. Our results show that considering co-benefits enhancement as an objective boosts the selection of green-blue infrastructure. However, flood mitigation effectiveness can be diminished when extra benefits are pursued. Finally, we proved that combining green-blue-grey measures is particularly important in urban spaces when several benefits are considered simultaneously. Subject Flood damage reductionHybrid drainage infrastructureMulti-objective optimisationMultiple benefitsNature based solutions To reference this document use: http://resolver.tudelft.nl/uuid:44a827dc-85b3-43a2-84c4-274e016913bb DOI https://doi.org/10.1016/j.scitotenv.2019.134980 ISSN 0048-9697 Source Science of the Total Environment, 703 Part of collection Institutional Repository Document type journal article Rights © 2020 Alida Alves, Zoran Vojinovic, Z. Kapelan, Arlex Sanchez, Berry Gersonius Files PDF 1_s2.0_S0048969719349721_main.pdf 2.76 MB Close viewer /islandora/object/uuid:44a827dc-85b3-43a2-84c4-274e016913bb/datastream/OBJ/view