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Development and modelling of realistic retrofitted Nature-based Solution scenarios to reduce flood occurrence at the catchment scale

Chen, Valerie ; Bonilla Brenes, Jose Ricardo ; Chapa, Fernando ; Hack, Jochen (2021):
Development and modelling of realistic retrofitted Nature-based Solution scenarios to reduce flood occurrence at the catchment scale. (Publisher's Version)
In: Ambio, 50 (8), Springer, ISSN 0044-7447, e-ISSN 1654-7209,
DOI: 10.26083/tuprints-00018922,
[Article]

Abstract

Decentralized Nature-based Solutions such as Urban Green Infrastructures (UGI) are increasingly promoted to reduce flooding in urban areas. Many studies have shown the effectiveness of flood control of UGI at a plot or neighbourhood level. Modelling approaches that extrapolate their flood reducing impact to larger catchment scales are often based on a simplistic assumption of different percentages of UGI implementation. Additionally, such approaches typically do not consider the suitable space for UGI and potential implementation constraints. This study proposes a scenario development and modelling approach for a more realistic upscaling of UGI based on empirical insights from a representative neighbourhood. The results from this study, conducted in the metropolitan area of Costa Rica, show that upscaling the full potential for UGI could significantly reduce surface runoff, peak flows, and flood volumes. In particular, the permeable pavement has the highest potential for flood reducing in public space while cisterns perform best at the property level. These results can guide the formation of policies that promote UGI.

Item Type: Article
Erschienen: 2021
Creators: Chen, Valerie ; Bonilla Brenes, Jose Ricardo ; Chapa, Fernando ; Hack, Jochen
Origin: Secondary publication service
Status: Publisher's Version
Title: Development and modelling of realistic retrofitted Nature-based Solution scenarios to reduce flood occurrence at the catchment scale
Language: English
Abstract:

Decentralized Nature-based Solutions such as Urban Green Infrastructures (UGI) are increasingly promoted to reduce flooding in urban areas. Many studies have shown the effectiveness of flood control of UGI at a plot or neighbourhood level. Modelling approaches that extrapolate their flood reducing impact to larger catchment scales are often based on a simplistic assumption of different percentages of UGI implementation. Additionally, such approaches typically do not consider the suitable space for UGI and potential implementation constraints. This study proposes a scenario development and modelling approach for a more realistic upscaling of UGI based on empirical insights from a representative neighbourhood. The results from this study, conducted in the metropolitan area of Costa Rica, show that upscaling the full potential for UGI could significantly reduce surface runoff, peak flows, and flood volumes. In particular, the permeable pavement has the highest potential for flood reducing in public space while cisterns perform best at the property level. These results can guide the formation of policies that promote UGI.

Journal or Publication Title: Ambio
Journal volume: 50
Number: 8
Publisher: Springer
Collation: 15 ungezählte Seiten
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Ecological Engineering
TU-Projects: Bund/BMBF|01UU1704|SEE-URBAN-WATER
Date Deposited: 28 Jul 2021 08:07
DOI: 10.26083/tuprints-00018922
Official URL: https://tuprints.ulb.tu-darmstadt.de/18922
URN: urn:nbn:de:tuda-tuprints-189222
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