How does increasing impervious surfaces affect urban flooding in response to climate variability?

Sohn, Won; Kim, Jun‐Hyun; Li, Ming-Han; Brown, Robert D.; Jaber, Fouad

doi:10.1016/j.ecolind.2020.106774

Cited by 62 publications

(31 citation statements)

References 48 publications

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“…Smith et al [27] found that the five largest floods in past 74 years in Charlotte, North Carolina occurred after 1995 suggesting that the drainage density (EIA) created this response. Such conclusions are corroborated throughout the literature [33] generating concerns that urban watersheds fundamentally changed by EIA are ill equipped to protect streams and rivers from impending climate change.…”

Section: Flooding and Impervious Surfacessupporting

confidence: 55%

Degradation and Improvement of Urban River Water Quality

Shahady¹

2022

Water Quality - Factors and Impacts

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The need to understand urban water quality has become a very important area of research and management in the aquatic sciences. Decades of urban development generating high rates of impervious surface, complex networks of stormwater control mechanisms and declining river water quality has created a demand for greater study. In this chapter, issues such as stream bank erosion, flooding, sediment pollution, bacteria and channelization are presented as drivers of the urban water environment. Methodologies and study designs to document these impacts are discussed. Ideas to improve the urban condition such as retrofitting previous development, infiltration of surface runoff, stream restoration, dredging and rehabilitation of lakes and compartmentalization of future development are explained and detailed as ways of integrating the natural landscape features into improvement of our urban centers. Finally, the incorporation of citizen science into adaptive policy is suggested as a solution to regulatory and esthetic/recreational need for improvement.

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Section: Flooding and Impervious Surfacessupporting

confidence: 55%

Degradation and Improvement of Urban River Water Quality

Shahady¹

2022

Water Quality - Factors and Impacts

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“…The cause is that the infilling growth area contributes to flooding vulnerability that is not apparent in a short period. When the infilling patch area increases to a certain threshold, it will affect the surface runoff's infiltration rate, thereby changing the socio-hydrological cycle system [45,46]. Thus, the increase in infilling BLF patches on the long-term scale will cause flood vulnerability dynamics.…”

Section: Impact Of Expansion Type On Flood Vulnerability and Adaptation Strategymentioning

confidence: 99%

“…The plan Based on the analysis above, the impact of infilling patches on flood vulnerability is not evident in a short period (Table 5). On a long-term scale, infilling patches influence the socio-hydrological cycle and ultimately lead to dynamics in flood vulnerability by altering surface runoff [45][46][47]. Therefore, designing urban open space within BLF patches can slow down the rapid convergence of surface runoff to mitigate flood vulnerability (Figure 16f).…”

Section: Impact Of Expansion Type On Flood Vulnerability and Adaptation Strategymentioning

confidence: 99%

“…However, we found a significant correlation (R = 0.27, p < 0.05) between the growth of infilling patches and flood vulnerability in 1975-2014, although this correlation was weaker than the growth of outlying and infilling patches (Table 5). Many studies have also shown that the growth of infilling patches increases impervious surfaces and thus affects surface runoff [45,46,50]. This effect may not be apparent for short periods.…”

Section: Comparison With Previous Studiesmentioning

confidence: 99%

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Impact of Expansion Pattern of Built-Up Land in Floodplains on Flood Vulnerability: A Case Study in the North China Plain Area

Wang

Liu

et al. 2020

Remote Sensing

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Built-up land in floodplains (BLF) is a driver and a disaster-bearing body of flood risk from a socio-hydrological perspective. The relationship between BLF growth and flood vulnerability is the key to understanding and managing flood risk. However, previous studies have focused more on the relationship between BLF growth and flood exposure, ignoring flood vulnerability. We examined the BLF expansion pattern (patch size and expansion type) in the North China Plain Area from 1975 to 2014 (1975–1990–2000–2014) using GIS (geographic information system)-based landscape analysis and revealed its relationship with flood vulnerability. The results show that the BLF area experienced rapid growth (288.26%) from dispersion to coalescence. Small patches dominated the number and area of BLF growth, and edge-expansion patches were the expansion type with the most area growth. We discovered that flood vulnerability was significantly correlated with the growth in small (R = 0.36, p < 0.01), edge-expansion (R = 0.53, p < 0.01), and outlying patches (R = 0.51, p < 0.01). Large patches were not significantly correlated with flood vulnerability (R = 0.18, p > 0.1), but there was a negative trend. Infilling patch growth was significantly associated with flood vulnerability over a long period (R = 0.27, p < 0.05). In addition, we suggest nature-based soft adaptations or village merging for small patches and outlying patches. Our findings have important scientific significance for adequately understanding the interplay between BLF growth and flood risk. It has practical implications for the formulation of integrated flood risk management strategy and the sustainable development of floodplains.

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“…Soil types, infiltration capacity, slopes and antecedent conditions all play important roles in determining the runoff from pervious areas [24][25][26][27][28]. The effect is very much dependent on local conditions [26,27] and is largest for larger rainfall events [24,28]. Hydraulic dimensioning criteria for SCMs for well-defined small catchments are mainstreamed through guidelines around the world [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Principles for Distributing Infiltration-Based Stormwater Control Measures in Series

Sørup

Lerer

2021

Water

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Infiltration-based stormwater control measures are often implemented in a dispersed manner across catchments, making it difficult to assess their combined effect. This study proposes a set of principles that can guide planners in distributing stormwater control measure volumes within a catchment while maintaining the same performance as that of a single large measure at the catchment outlet. The principles are tested by setting up seven different cases, which respect and violate the principles in different ways, and by simulating their performance using continuous simulations with 41 years of data. The results show that when the principles are followed, the system performance is maintained; on the contrary, when the principles are violated, the system performance deteriorates. The principles can be very useful for green field developers who want to implement distributed stormwater control measures in series and need to document their expected effect at an early screening level. Furthermore, the principles can be used to make better simplifications of stormwater control measures in sewer system models at the catchment level.

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How does increasing impervious surfaces affect urban flooding in response to climate variability?

Cited by 62 publications

References 48 publications

Degradation and Improvement of Urban River Water Quality

Degradation and Improvement of Urban River Water Quality

Impact of Expansion Pattern of Built-Up Land in Floodplains on Flood Vulnerability: A Case Study in the North China Plain Area

Principles for Distributing Infiltration-Based Stormwater Control Measures in Series

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