Providers of decentralized blue-green flood adaptation measures protect others, not themselves, even in flat urban terrain

IF 4.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

International journal of disaster risk reduction Pub Date : 2025-07-23 DOI:10.1016/j.ijdrr.2025.105721

Matteo Roggero , Fabio Brill , Franziska Tügel

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引用次数: 0

Abstract

We address social dilemmas in dealing with urban pluvial floods in Berlin, Germany. The city has made little progress towards its own goal of becoming a sponge city, promoting decentralized rainwater management through blue-green infrastructure. Policy instruments in place focus on stimulating citizen's voluntary, precautionary self-protection against pluvial floods, implicitly assuming that providers and beneficiaries of decentralized, blue-green flood protection are the same. Analyzing flooding areas and their subcatchments based on hydrodynamic simulations of heavy-rain events with return periods between 10 and 100 years, we show that this is not the case. Despite the city's flat topography, we observe upstream-downstream relations between providers and beneficiaries of decentralized, blue-green flood protection. Addressing pluvial floods with blue-green infrastructure implies the protection of others – a different social dilemma requiring different policy instruments.

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分散式蓝绿洪水适应措施的提供者保护的是他人，而不是自己，即使在平坦的城市地形上也是如此

我们在处理德国柏林的城市洪水时解决社会困境。通过蓝绿色基础设施促进分散的雨水管理，这座城市在实现成为海绵城市的目标方面进展甚微。现有的政策工具侧重于刺激公民对洪水的自愿、预防性自我保护，隐含地假设分散式、蓝绿色洪水保护的提供者和受益者是相同的。通过对重现期在10年至100年之间的暴雨事件的水动力学模拟分析洪涝区及其子集水区，我们发现情况并非如此。尽管城市地势平坦，但我们观察到分散的蓝绿色防洪提供者和受益者之间的上下游关系。用蓝绿色基础设施来解决洪水泛滥意味着保护他人——这是一个不同的社会困境，需要不同的政策工具。

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来源期刊

International journal of disaster risk reduction GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES

CiteScore

8.70

自引率

18.00%

发文量

688

审稿时长

79 days

期刊介绍： The International Journal of Disaster Risk Reduction (IJDRR) is the journal for researchers, policymakers and practitioners across diverse disciplines: earth sciences and their implications; environmental sciences; engineering; urban studies; geography; and the social sciences. IJDRR publishes fundamental and applied research, critical reviews, policy papers and case studies with a particular focus on multi-disciplinary research that aims to reduce the impact of natural, technological, social and intentional disasters. IJDRR stimulates exchange of ideas and knowledge transfer on disaster research, mitigation, adaptation, prevention and risk reduction at all geographical scales: local, national and international. Key topics:- -multifaceted disaster and cascading disasters -the development of disaster risk reduction strategies and techniques -discussion and development of effective warning and educational systems for risk management at all levels -disasters associated with climate change -vulnerability analysis and vulnerability trends -emerging risks -resilience against disasters. The journal particularly encourages papers that approach risk from a multi-disciplinary perspective.