China’s ‘Sponge Cities’: The role of constructed wetlands in alleviating urban pluvial flooding

The Water Framework Directive (WFD) focuses on reduction of nutrients in individual water bodies. Innovative drainage filter technologies currently being tested in Denmark could facilitate nutrient reductions at the sub-river basins and catchment levels. The implementation strategy for these technologies, however, remains a challenge. Using both primary and secondary data, this paper presents an in-depth analysis of the role of these technologies in implementation of the WFD in Denmark. Concepts of impact assessment are used to identify the most suitable approach for incorporating these technologies into environmental measures based on a three-faceted policy instrument typology. A voluntary approach supported by investment subsidies, or incentives that could replace existing requirements, is deemed more appropriate.

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Can urban pluvial flooding be predicted by open spatial data and weather data?

Environmental Modelling & Software ◽

10.1016/j.envsoft.2016.08.007 ◽

2016 ◽

Vol 85 ◽

pp. 156-171 ◽

Cited By ~ 14

Author(s):

S. Gaitan ◽

N.C. van de Giesen ◽

J.A.E. ten Veldhuis

Keyword(s):

Spatial Data ◽

Weather Data ◽

Pluvial Flooding ◽

Urban Pluvial Flooding

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Artificial floating islands for water quality improvement

Environmental Reviews ◽

10.1139/er-2016-0038 ◽

2017 ◽

Vol 25 (3) ◽

pp. 350-357 ◽

Cited By ~ 13

Author(s):

Yueya Chang ◽

He Cui ◽

Minsheng Huang ◽

Yan He

Keyword(s):

Water Quality ◽

Quality Improvement ◽

Constructed Wetlands ◽

Oxygen Demand ◽

Key Factors ◽

Water Quality Improvement ◽

Factors Influencing ◽

Wetland Treatment ◽

Improve Water Quality

Artificial floating islands (AFIs) are a variation of wetland treatment systems for water quality improvement. This paper provides a review concerning AFIs in terms of their development, classification, and applications in the removal of nutrients, heavy metals, and chemical oxygen demand on waterways. The role of microorganisms, aquatic plants, and aquatic animals in AFIs for water decontamination and purification was also discussed. Additionally, some key factors influencing the AFIs’ performances were discussed and comparisons between AFIs and constructed wetlands were reviewed. Finally, further perspectives of artificial floating islands were identified to possibly improve their performances. The understanding of the mechanisms in AFIs that drive removal of various contaminants to improve water quality is crucial, and is also highlighted in this paper.

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Influence of urban forms on surface flow in urban pluvial flooding

Journal of Hydrology ◽

10.1016/j.jhydrol.2019.124493 ◽

2020 ◽

Vol 582 ◽

pp. 124493 ◽

Cited By ~ 2

Author(s):

Martin Bruwier ◽

Claire Maravat ◽

Ahmed Mustafa ◽

Jacques Teller ◽

Michel Pirotton ◽

...

Keyword(s):

Surface Flow ◽

Urban Forms ◽

Pluvial Flooding ◽

Urban Pluvial Flooding

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A Vulnerability Assessment of Urban Emergency in Schools of Shanghai

Sustainability ◽

10.3390/su11020349 ◽

2019 ◽

Vol 11 (2) ◽

pp. 349 ◽

Cited By ~ 2

Author(s):

Jie Yin ◽

Yameng Jing ◽

Dapeng Yu ◽

Mingwu Ye ◽

Yuhan Yang ◽

...

Keyword(s):

Emergency Services ◽

Response Times ◽

Flood Hazard ◽

Hot Spot ◽

Hazard Analysis ◽

Rescue Service ◽

Traffic Conditions ◽

Pluvial Flooding ◽

Urban Pluvial Flooding ◽

The City

Schools and students are particularly vulnerable to natural hazards, especially pluvial flooding in cities. This paper presents a scenario-based study that assesses the school vulnerability of emergency services (i.e., Emergency Medical Service and Fire & Rescue Service) to urban pluvial flooding in the city center of Shanghai, China through the combination of flood hazard analysis and GIS-based accessibility mapping. Emergency coverages and response times in various traffic conditions are quantified to generate school vulnerability under normal no-flood and 100-y pluvial flood scenarios. The findings indicate that severe pluvial flooding could lead to proportionate and linear impacts on emergency response provision to schools in the city. Only 11% of all the schools is predicted to be completely unreachable (very high vulnerability) during flood emergency but the majority of the schools would experience significant delay in the travel times of emergency responses. In this case, appropriate adaptations need to be particularly targeted for specific hot-spot areas (e.g., new urbanized zones) and crunch times (e.g., rush hours).

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Assessing the role of microbial communities in the performance of constructed wetlands used to treat combined sewer overflows

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.139519 ◽

2020 ◽

Vol 736 ◽

pp. 139519

Author(s):

Jan P. Ruppelt ◽

Katharina Tondera ◽

Sarah J. Wallace ◽

Mark Button ◽

Johannes Pinnekamp ◽

...

Keyword(s):

Microbial Communities ◽

Constructed Wetlands ◽

Combined Sewer Overflows ◽

Combined Sewer ◽

Sewer Overflows

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Role of three different plants on simultaneous salt and nutrient reduction from saline synthetic wastewater in lab-scale constructed wetlands

The Science of The Total Environment ◽

10.1016/j.scitotenv.2016.11.074 ◽

2017 ◽

Vol 579 ◽

pp. 447-455 ◽

Cited By ~ 11

Author(s):

João M. Jesus ◽

A.C. Cassoni ◽

Anthony S. Danko ◽

António Fiúza ◽

Maria-Teresa Borges

Keyword(s):

Constructed Wetlands ◽

Synthetic Wastewater ◽

Nutrient Reduction

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French vertical flow constructed wetlands: a need of a better understanding of the role of the deposit layer

Water Science & Technology ◽

10.2166/wst.2013.561 ◽

2013 ◽

Vol 69 (1) ◽

pp. 106-112 ◽

Cited By ~ 33

Author(s):

Pascal Molle

Keyword(s):

Constructed Wetlands ◽

Organic Layer ◽

Vertical Flow ◽

Biological Behaviour ◽

Positive Role ◽

Vertical Flow Constructed Wetlands ◽

Key Factor ◽

Deposit Layer ◽

Raw Wastewater

French vertical flow constructed wetlands, treating directly raw wastewater, have become the main systems implemented for communities under 2,000 population equivalent in France. Like in sludge drying reed beds, an organic deposit layer is formed over time at the top surface of the filter. This deposit layer is a key factor in the performance of the system as it impacts hydraulic, gas transfers, filtration efficiency and water retention time. The paper discusses the role of this deposit layer on the hydraulic and biological behaviour of the system. It presents results from different studies to highlight the positive role of the layer but, as well, the difficulties in modelling this organic layer. As hydraulic, oxygen transfers, and biological activity are interlinked and impacted by the deposit layer, it seems essential to focus on its role (and its quantification) to find new developments of vertical flow constructed wetlands fed with raw wastewater.

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