Can flood resilience of green-grey-blue system cope with future uncertainty?

Yin, Dingkun; Zhang, Xiaoyue; Cheng, Yihua; Jia, Haifeng; Jia, Qimeng; Yang, Yongchun

doi:10.1016/j.watres.2023.120315

Cited by 17 publications

(3 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) The integrated green-grey-blue (IGGB) system has gained interest worldwide in mitigating flood issues [73,74]. The IGGB urban infrastructure system for flood management should be strengthened to construct different "watershed, city, drainage zone levels".…”

Section: Strategies For Qinghai Province To Improve Urban Flood Resil...mentioning

confidence: 99%

Resilience-Vulnerability Balance and Obstacle Factor Analysis in Urban Flooding: A Case Study in the Qinghai–Tibetan Plateau

Wang,

Xu,

et al. 2024

Buildings

View full text Add to dashboard Cite

Under the combined influence of climate change and urban development, the risk of urban flooding caused by extreme weather events has increased significantly, making assessing flood vulnerability and resilience increasingly crucial for urban flood management. With the 45 counties in Qinghai Province as the research objects, the hazard risk of flood and exposure are combined to study their vulnerability. At the same time, resilience is evaluated by the indicators selected from four dimensions (society, economy, environment, and infrastructure). Through Z-scoring, the vulnerability and resilience of each county are clustered into four groups to explore their associations from a spatial balance perspective. Obstacle factor analysis is introduced to summarize the key factors affecting the improvement of urban resilience in Qinghai Provence. The results show that the eastern areas of Qinghai experience high vulnerability to flooding because of high levels of hazard and exposure. What is more, Xining, Haidong, and Haixi experience a high level of resilience. A strong spatial mismatch between vulnerability and resilience exists in Qinghai, with 24 counties (58%) being self-adapted, 8 counties (18%) over-abundant, and 11 counties deficient in terms of nature–nurture. The length of levee and number of beds in medical institutions are the main obstacles to resilience in Qinghai. The research results can provide a theoretical and scientific basis for future urban flood management and resilience development in the Qinghai–Tibetan Plateau.

show abstract

Section: Strategies For Qinghai Province To Improve Urban Flood Resil...mentioning

confidence: 99%

Resilience-Vulnerability Balance and Obstacle Factor Analysis in Urban Flooding: A Case Study in the Qinghai–Tibetan Plateau

Wang,

Xu,

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Although the redundant intervention measures of specific solutions for the urban drainage system (UDS) offer significant reductions in flood risk, the expedited discharge of runoff may engender downstream flood hazards and the translocation of water accumulation sites [33]. Furthermore, within the context of future climate change uncertainties, purely structural mitigation interventions may exhibit limitations, and the integration with green stormwater infrastructure (GSI) has demonstrated efficacy [38,39]. Considering the flexibility of GSI [24]-characterized by the intrinsic capacity of the system to reconfigure and adjust under diverse (fluctuating) load conditions to sustain an acceptable performance level-coupled with the two types of redundant intervention schemes executed in this research, it is anticipated that the disparity in flood resilience between centralized and decentralized UDS layouts will be made up.…”

Section: B the Edges Of Hybrid Modementioning

confidence: 99%

A Structural Optimization of Urban Drainage Systems: An Optimization Approach for Mitigating Urban Floods

Zhang,

Wang,

Gong

2024

Water

View full text Add to dashboard Cite

Urbanization and climate change increasingly challenge urban water management. In this context, the design of stormwater drainage systems, which traditionally relies on historical rainfall records, is being questioned. Although significant efforts have been dedicated to optimizing drainage networks, the upgrading of existing systems remains understudied. This research devised a set of viable stormwater drainage networks, referencing the road network of the Sino-Singapore Tianjin Eco-City (data from Google Maps). On this basis, utilizing design rainfall data (sourced from the local meteorological center), an extensive array of scenario analyses was conducted. The investigation assessed the performance of implementing two redundancy-based interventions—introducing loops and enlarging pipe diameters—as well as the patterns of flood risk response, and by integrating a multi-objective optimization algorithm, this study proposes a framework for the optimization of grey infrastructure upgrades based on component replacement. The findings suggest that a precise deployment strategy for grey infrastructure is essential. The former improves the effective flow distribution of the drainage system, while the latter enhances its flow capacity, making each intervention suitable for drainage systems with a different degree of centralization. Further research shows that an integrated hybrid scheme brings significant flood risk improvement with strong applicability for most urban drainage systems. The upgrade model proposed in this study could be a valuable initiative, offering theoretical insights for the construction and development of resilient cities.

show abstract

“…The intensity and frequency of urban pluvial flooding is also increasing, and cities are often forced to rely on temporary solutions, ignoring long-term solutions [1]. Some researchers estimated that climate change can reduce flood resilience by around 3.2% to 4.28% [2]. Urban pluvial flooding is an "invisible hazard," as described by [3].…”

Section: Introductionmentioning

confidence: 99%

Low Impact Development-An effective tool towards urban flood resilience

Ambily,

Reddy,

Ganesh

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The uncertainties created by climate change and the pressure of urbanisation create unparalleled challenges to urban disaster management. Conventional solutions to urban infrastructure management are no longer sufficient to combat emerging challenges. Among all the disasters, floods require special attention because of the destruction it is causing to the economy and their frequency of occurrence. Managing urban pluvial floods is causing a real challenge due to the uncertainties about the source and direction of flow and the insufficiency of grey infrastructure. Low Impact Development (LID) technologies are recognised by many researchers as an effective method to support the existing grey infrastructure. In this paper, the authors analyse and understand the effectiveness of LID techniques in creating urban flood resilience. A frequently flooded region in the south-Indian, coastal city of Kochi is selected as the study region. The results indicate that, among the three experimented options of porous pavements, bio-retention cells and rain barrels, permeable pavements created the highest reduction in the run-off if used in isolation. However, a combination of various technologies is found to be more efficient than localised attempts in a micro-scale. The study also found that the efficacy of LID technologies depends on the local characteristics, including topography, soil type and spatial availability. The research can be further carried out using more LID technologies and linking it with the existing drainage network.

show abstract

Can flood resilience of green-grey-blue system cope with future uncertainty?

Cited by 17 publications

References 45 publications

Resilience-Vulnerability Balance and Obstacle Factor Analysis in Urban Flooding: A Case Study in the Qinghai–Tibetan Plateau

Resilience-Vulnerability Balance and Obstacle Factor Analysis in Urban Flooding: A Case Study in the Qinghai–Tibetan Plateau

A Structural Optimization of Urban Drainage Systems: An Optimization Approach for Mitigating Urban Floods

Low Impact Development-An effective tool towards urban flood resilience

Contact Info

Product

Resources

About