A new framework to assess and optimize urban flood resilience with green-grey-blue system

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL Journal of Hydrology Pub Date : 2024-12-25 DOI:10.1016/j.jhydrol.2024.132614

Dingkun Yin , Xiaoyue Zhang , Haifeng Jia , Lili Xu , Qimeng Jia , Ye Yang

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Abstract

The vulnerability of cities to flood has become a global issue due to urbanization. Although various studies have been evaluated urban flood resilience using various indicators, a comprehensive flood resilience assessment method considering the entire process of stormwater runoff production and concentration remains a gap. To cope with this issue, a three-step new framework integrating index system construction, coupled model simulation and scenario optimization with green-grey-blue system (GGBS) was established. The results showed that poor flood recovery ability contributed mainly to low urban flood resilience (FR) in urbanizing areas. Optimization of GGBS preferred for blue and grey facilities, due to high marginal cost of green infrastructures (GIs). However, FR could increase by 78%-104% when incorporating GIs. Nevertheless, either few or excessive GIs would result in higher marginal costs, possibly due to the tradeoff between benefits and cost. Synergistic effects of GGBS were characterized by flood resistance and recovery enhancement, with mean recession time, mean runoff discharged into river, and storage capacity being the most sensitive indicators. Incorporation of GIs could reinforce the synergies by regulating landscape composition and hydrological connection.

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基于绿灰蓝系统的城市抗洪能力评估与优化新框架

由于城市化，城市易受洪水影响已成为一个全球性问题。虽然已有各种研究利用各种指标对城市抗洪能力进行了评价，但一种综合考虑雨水径流产生和集中全过程的抗洪能力评价方法仍然是空白的。为解决这一问题，建立了基于绿灰蓝系统（GGBS）的指标体系构建、耦合模型仿真和场景优化三步走的新框架。结果表明，城市化地区洪水恢复能力差是导致城市洪水恢复力低的主要原因。由于绿色基础设施（GIs）的高边际成本，GGBS的优化倾向于蓝色和灰色设施。然而，当纳入地理标志时，FR可增加78%-104%。然而，地理标志少或过多都会导致较高的边际成本，这可能是由于效益和成本之间的权衡。协同效应表现为抗洪增效，其中平均退耕时间、平均入河径流量和库容是最敏感的指标。地理标志的引入可以通过调节景观组成和水文联系来增强协同效应。

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.