Mitigation of Basement Flooding due to Sewer Backup: Overview and Experimental Investigation of Backwater Valve Performance

Irwin, Sarah; Howlett, Christopher J.; Binns, Andrew D.; Sandink, Dan

doi:10.1061/(asce)nh.1527-6996.0000298

Cited by 15 publications

(7 citation statements)

References 4 publications

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“…However, with present regulations, they must be able to cope with 10 year return period rainfalls without causing basement flooding. One could argue that if properties had backwater valves on their sewer laterals that this would affect the level of flood exposure [67]. Accordingly, there are recommendations and campaigns to encourage property owners to install backwater valves and handle rainwater locally.…”

Section: Systemic Inequity Of Flood Exposurementioning

confidence: 99%

Systemic Inequity in Urban Flood Exposure and Damage Compensation

Mobini

Becker

Larsson

et al. 2020

Water

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Urban flooding is a growing concern in Northern Europe. While all countries in this region invest substantial resources into urban flood risk management, all property owners have unequal opportunity to have their flood risk managed. This paper presents the notion of equity in the urban flood risk management, focusing on urban flood exposure and compensation after sewage surcharge on the 31 August 2014 cloudburst over Malmö in Sweden. All damage claims and the procedures assessing them were analysed based on the type of sewer system (combined or separated) that affected the properties. The results demonstrated considerable systemic inequity in both flood exposure and damage compensation. The owners of properties connected to combined systems were four times more likely to make a damage claim, while having their damage claims approved just over half as often, compared with owners of properties connected to separated sewage systems. Considering the multifaceted nature of both inequities and their possible resolution, current praxis is not sufficient for the management of future urban drainage systems; not only concerning changing climatic conditions but also concerning social conditions.

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Section: Systemic Inequity Of Flood Exposurementioning

confidence: 99%

Systemic Inequity in Urban Flood Exposure and Damage Compensation

Mobini

Becker

Larsson

et al. 2020

Water

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“…Social and racial disparities in the quality of local water infrastructure-along with historical segregation and "redlining"-increase risk for some groups while lowering risk for others (Bodenreider et al, 2019;National Academies of Sciences, Engineering, and Medicine, 2019;PR Newswire, 2021;VanDerslice, 2011). Finally, households may not be resilient to flooding: cracks in basements or uncapped sewer outlets put homes at even higher risk for groundwater infiltration or sewer backups, as was found in a previous study in Detroit (Irwin et al, 2018;Larson et al, 2021;Peirce et al, 2022). Urban areas characterized by poverty commonly have older homes and have historically lacked infrastructure to support water drainage (Green et al, 2021;Rosa & Pappalardo, 2020), and residents or landlords may lack financial resources to repair and mitigate potential problems (Larson et al, 2021).…”

Section: Introductionmentioning

confidence: 91%

Crowd‐based spatial risk assessment of urban flooding: Results from a municipal flood hotline in Detroit, MI

Larson,

Thorsby,

Liu

et al. 2024

J Flood Risk Management

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Climate change is increasing the frequency and intensity of extreme precipitation events, raising the risk of urban flood disasters. This study uses a crowd‐sourced municipal call database to characterize the spatial distribution of flood risk in Detroit, MI. Call data including dates and addresses were obtained from the City of Detroit Department of Public Works for 2021. Calls were mapped and aggregated to census tract counts and merged with neighborhood‐level data. Associations of predictors with flood calls were tested using spatial regression models. Flooding calls were located throughout the city but were concentrated in specific areas. Multivariate models of census tract level call counts indicated that increased poverty and Black, immigrant, and older residents were positively associated with flood calls, while increased elevation was associated with protective effects. Longer distances from waste water interceptors were associated with higher risk for calls. Crowd‐sourced flood hotline call data can be used for effective spatial flood risk assessment. Though flooding occurs throughout the city of Detroit, infrastructural, neighborhood, and household factors influence flooding extent. Limitations included the self‐reported nature of calls. Future modeling efforts might include input from local stakeholders to improve spatial risk assessment.

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“…Back ow is identi ed as a situation in which the free ow capacity in a downstream section of a collection system has been fully reached (Figure 5) and acts as a disruption to further ow (Irwin et al, 2018). The phenomenon of back ow in wastewater and rain water systems is mostly due to blockages in the network .…”

Section: Back Owmentioning

confidence: 99%

A Review of Sewerage and Drainage Systems Management in Sub-Saharan African Cities: Case of Abidjan, Côte d’Ivoire.

Ouattara

Kabo-bah

Dongo

et al. 2022

Preprint

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The malfunction of sewerage systems and rain water drainage networks is perceived as a very crucial problem by authorities in Côte d'Ivoire, both from an environmental point of view as well as the associated maintenance costs. This paper discusses the state of the sewerage systems, the malfunctions and environmental concepts used to categorize the problems, and the methodological options to prioritize the various management solutions. This review also presents the selection of decision support tools for sewerage asset management. The tools were classified according to their capability and functionality. The working principle of each of these tools was described and the corresponding data requirements were determined. Moreover, the paper discussed the problems associated with the use of existing tools and presents a perspective on future research needs in the field of decision support tools. This paper represents a comprehensive review of the sewage systems management challenges and can serve as a reference document for other developing countries in Sub-Saharan Africa.

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Mitigation of Basement Flooding due to Sewer Backup: Overview and Experimental Investigation of Backwater Valve Performance

Cited by 15 publications

References 4 publications

Systemic Inequity in Urban Flood Exposure and Damage Compensation

Systemic Inequity in Urban Flood Exposure and Damage Compensation

Crowd‐based spatial risk assessment of urban flooding: Results from a municipal flood hotline in Detroit, MI

A Review of Sewerage and Drainage Systems Management in Sub-Saharan African Cities: Case of Abidjan, Côte d’Ivoire.

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