Assessing the effectiveness of green infrastructures on urban flooding reduction: A community scale study

Liu, Wen; Peng, Chi

doi:10.1016/j.ecolmodel.2014.07.012

Cited by 238 publications

(130 citation statements)

References 22 publications

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“…This result is similar to one where it was found that creating green spaces such as street plantings in a concave rather than in a convex form by raising the elevation higher than surrounding roadways can be advantageous for reducing flooding by rainwater infiltration. In the case of reconstructing all green spaces in a community to a depth of 5 cm, it was found that runoff could be reduced by a maximum of 16% and the peak outflow by about 25% [5]. Concave-shaped green spaces could be interpreted in the same context as Type 3 green spaces.…”

Section: Discussionmentioning

confidence: 90%

Effect of Urban Green Spaces and Flooded Area Type on Flooding Probability

2016

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Abstract:Countermeasures to urban flooding should consider long-term perspectives, because climate change impacts are unpredictable and complex. Urban green spaces have emerged as a potential option to reduce urban flood risks, and their effectiveness has been highlighted in notable urban water management studies. In this study, flooded areas in Seoul, Korea, were divided into four flooded area types by cluster analysis based on topographic and physical characteristics and verified using discriminant analysis. After division by flooded area type, logistic regression analysis was performed to determine how the flooding probability changes with variations in green space area. Type 1 included regions where flooding occurred in a drainage basin that had a flood risk management infrastructure (FRMI). In Type 2, the slope was steep; the TWI (Topographic Wetness Index) was relatively low; and soil drainage was favorable. Type 3 represented the gentlest sloping areas, and these were associated with the highest TWI values. In addition, these areas had the worst soil drainage. Type 4 had moderate slopes, imperfect soil drainage and lower than average TWI values. We found that green spaces exerted a considerable influence on urban flooding probabilities in Seoul, and flooding probabilities could be reduced by over 50% depending on the green space area and the locations where green spaces were introduced. Increasing the area of green spaces was the most effective method of decreasing flooding probability in Type 3 areas. In Type 2 areas, the maximum hourly precipitation affected the flooding probability significantly, and the flooding probability in these areas was high despite the extensive green space area. These findings can contribute towards establishing guidelines for urban spatial planning to respond to urban flooding.

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Section: Discussionmentioning

confidence: 90%

Effect of Urban Green Spaces and Flooded Area Type on Flooding Probability

2016

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“…Impacts of green infrastructures on stormwater infiltration, retention and storage capacity are accounted for in calculating runoff. Detail information on the model can be found in Liu et al (2014).…”

Section: Model Descriptionmentioning

confidence: 99%

“…Many researches have studied the hydrological performance of green infrastructure practices on a laboratory, a pilot scale and insitu full scale (Abbott and Comino-Mateos, 2003;Alfredo et al, 2010;Chapman and Horner, 2010;Dietz, 2007;Fassman and Blackbourn, 2010;Qin et al, 2013). Although the green infrastructure performance on reducing runoff volumes has been extensively investigated, few studies have attempted to compare the reduction effectiveness between integrated green infrastructure and single facilities (Liu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Influences of setting sizes and combination of green infrastructures on community’s stormwater runoff reduction

Liu

Chen

Peng

2015

Ecological Modelling

Self Cite

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Implementation of green infrastructures is an effective option for mitigating the impacts of increasing urbanization on stormwater runo ff. In this study, we evaluated the runoff reduction effectiveness under various setting sizes of green infrastructures using a process-based stormwater runoff model. The model was validated with field data from a typical community in Beijing and proved to be accurate in estimating stormwater runoff under larger rain events. The pervious area percentage and soil hydraulic properties were key parameters influencing stormwater runoff. The four types of green infrastructures, including green area expanding, concave green space, storage pond and porous brick pavement were effective in reducing stormwater runoff, but single facility except the storage pond could not fully control runoff of 5-year recurrence storm. With integrated green infrastructures, runoff of 5-year recurrence storm could be 100% reduced by expanding the pervious area percentage to over 50%, or increase storage pond volume to over 1800 m 3 , whereas a maximum runoff reduction of 95% could be achieved when the green land was reformed to concave with a depth of 4 cm, or 50% of the impervious area was replaced with porous brick pavement with a storage capacity of 8 mm. The combination of green infrastructures with proper setting sizes is necessary for optimal control of stormwater runoff management.

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“…GI plays an important role in the field of flood risk management in urban areas, and its potential for flood risk reduction has been demonstrated in numerous studies. For instance, Liu et al [32] have investigated the impact of GI on a typical neighborhood in Beijing and have found that by implementing integrated GI, runoff of a five-year return period storm has been 100% reduced. In Augustenborg and Malmo in Sweden, GI has reduced stormwater runoff by 50% [33].…”

Section: The Rise Of Green Infrastructurementioning

confidence: 99%

Rebuild by Design in Hoboken: A Design Competition as a Means for Achieving Flood Resilience of Urban Areas through the Implementation of Green Infrastructure

Trogrlić

Rijke

Dolman

et al. 2018

Water

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Abstract:The Rebuild by Design (RBD) competition was launched after the devastating impact of Hurricane Sandy, and the winning designs have put a significant emphasis on green infrastructure (GI) as a means of achieving flood resilience in urban areas. Previous research in the field of urban stormwater management indicates that wide-spread implementation of GI remains a challenge, largely due to a lack of understanding of the required governance approaches. Therefore, by using a case study of Hoboken, for which the winning design was developed, this paper explores whether RBD provides governance structures and processes needed for the uptake of GI. Semi-structured interviews and desk study provided the data for an analysis of the presence of factors for supporting the transformative governance needed to facilitate the uptake of innovative solutions. Results indicate that RBD brought a greater change in terms of governance processes when compared to governance structures. In Hoboken, RBD created a narrative for long-term change, put GI as a preferred solution for tackling multiple challenges, and strengthened the local political buy-in. However, pitfalls were observed, such as limited funding provision, lack of regulatory compliance, economic justification and large investments required from public and private parties. The absence of these factors can hinder the overall uptake of the GI solution. Even though the design competition presents a novel approach to the field of resilience development, further steps should be made in understanding how the RBD methodology can be adjusted to provide results of equal quality in different settings (e.g., less developed regions, different governance contexts).

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Assessing the effectiveness of green infrastructures on urban flooding reduction: A community scale study

Cited by 238 publications

References 22 publications

Effect of Urban Green Spaces and Flooded Area Type on Flooding Probability

Effect of Urban Green Spaces and Flooded Area Type on Flooding Probability

Influences of setting sizes and combination of green infrastructures on community’s stormwater runoff reduction

Rebuild by Design in Hoboken: A Design Competition as a Means for Achieving Flood Resilience of Urban Areas through the Implementation of Green Infrastructure

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