Groundwater flooding in a river‐connected alluvial aquifer

Abboud, Jason; Ryan, M. Cathryn; Osborn, Gerald

doi:10.1111/jfr3.12334

Cited by 31 publications

(34 citation statements)

References 28 publications

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“…Rising water tables can lead to the presence of groundwater near residential foundations which can increase basement flood potential and damage to the foundation (Soren, 1976). This was recently observed in the Alberta 2013 floods where increases in the river stage lead to rising groundwater levels in riverconnected aquifers, leading to occurrences of infiltration flooding into basements (Abboud et al, 2018). Changes in groundwater abstraction rates and practices have also led to documented cases of rising groundwater levels and concern regarding the impact on infrastructure (Wilkinson, 1985).…”

Section: Environmental Factorsmentioning

confidence: 97%

Reducing Urban Flood Risk Through Building- and Lot-Scale Flood Mitigation Approaches: Challenges and Opportunities

Sandink¹,

Binns²

2021

Front. Water

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Urban flooding events are a significant driver of disaster loss, resulting in insured and uninsured losses, property damage, and negative impacts on residents and communities in Canada and internationally. The risk of flooding in urban environments is affected by watershed characteristics, environmental conditions, and the presence and condition of flood management and mitigation technologies. Several building- and lot-scale (or private-side) flood mitigation options are available to better protect properties from the risk of flooding, including backwater valves and foundation drainage systems to reduce the risks of sewer surcharge and infiltration flooding into basements, respectively. The overall success of private-side approaches to reduce the risk of flooding into buildings is reliant upon consistent installation procedures, building code interpretation and enforcement, public engagement, and maintenance. Current research into private-side approaches is presenting many opportunities and solutions for improved flood protection against water-related disasters at home. A greater understanding of the performance of private-side technologies under complex site-specific conditions can help to appoint flood prevention strategies better suited to individual home characteristics. This review paper explores the inter-related factors that affect the risk of basement flooding and explores the challenges and opportunities associated with the adoption and success of private-side flood mitigation approaches. Developing a greater understanding of basement flood vulnerability at the lot-scale will assist in identifying and prioritizing private-side strategies for homeowners to adopt and reduce the risk of flooding based on site-specific conditions affecting flood vulnerability. Continued efforts to evaluate and identify flood risk factors and the performance of private-side strategies are needed to better manage urban flooding events.

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Section: Environmental Factorsmentioning

confidence: 97%

Reducing Urban Flood Risk Through Building- and Lot-Scale Flood Mitigation Approaches: Challenges and Opportunities

Sandink¹,

Binns²

2021

Front. Water

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“…While probabilistic and empirical approaches have contributed to the development of regional groundwater flood maps (Cobby et al, 2009;Jacobs, 2007), physically-based models are scarce. Abboud et al (2018) found that the June 2013 compound flood disaster in the Elbow River (Canada) was induced by steady precipitation and increased river flow discharges from upstream basins resulting in basement flooding due to the rise of the water table. The combined effects of fluvial and groundwater flooding were not considered on that study since the MODFLOW river package focused exclusively on groundwater flow.…”

Section: Introductionmentioning

confidence: 99%

Compound flood modelling framework for rainfall-groundwater interactions

Peña

Nardi

Melesse

et al. 2021

Preprint

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Abstract. Compound floods are an active area of research where the complex interaction between pluvial, fluvial, coastal or groundwater flooding are analyzed. A number of studies have simulated the compound flooding impacts of precipitation, river discharge and storm surge variables with different numerical models and linking techniques. However, groundwater flooding is often neglected in flood risk assessments due to its sporadic frequency - as most regions have water tables sufficiently low that do not exacerbate flooding conditions -, isolated impacts and considerably less severity in respect to other types of flooding. This paper presents a physically-based, loosely-coupled modelling framework using FLO-2D and MODFLOW-2005 that is capable to simulate surface-subsurface water interactions to represent compound flooding events in North Miami. FLO-2D, responsible of the surface hydrology and infiltration processes, transfers the infiltration volume as recharge to MODFLOW-2005 until the soil absorption capacity is exceeded, while MODFLOW-2005 return exchange flow to the surface when groundwater heads are higher than the surface depth. The model calibration is based on three short-lived storm events that as individual processes represent minimum flooding conditions but in combination with pre-existing high-water table levels results in widespread flooding across the study area. Understanding groundwater flood risk is of particular interest to low-elevation coastal karst environments as the sudden emergence of the water table at ground surface can result in social disruption, adverse effects to essential services and damage infrastructure. Results are validated using FEMA’s severe repetitive loss (SRL) property records and crowdsourced data. Further research should assess the exacerbated impacts of high tides and sea level rise on water tables under current and future climate projections.

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“…Moreover, uncontrolled seepage may result in a hazard both to flood protection elements and to the subsurface parts of structures like cellars, subsurface garages, and so on in the territory protected against flooding (MacDonald, Dixon, Newell, & Hallaways, 2012). The threat is posed by the pressure of subsurface water on the inundation and subsurface infrastructure (Abboud, Ryan, & Osborn, 2017; Kreibich & Thieken, 2008), namely underground parts of civil structures, and by the high hydraulic gradients along the foundations of flood protection elements and at places of groundwater leakage onto the ground surface. Seepage into the protected area is also unfavourable during a flood as it increases the amount of “internal waters” that must be pumped back into the stream.…”

Section: Introductionmentioning

confidence: 99%

Mapping of uplift hazard due to rising groundwater level during floods

Julínek

Duchan

Říha

2020

J Flood Risk Management

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European Directive 2007/60/EC only briefly mentions the problem of hazard arising due to groundwater flooding, and techniques for the mapping of hazard occuring due to rising groundwater have not yet been scientifically developed. The groundwater-related threats that occur during floods may include concentrated leakage of groundwater behind levees, heave, or potential uplift of the topsoil layer at the protected area. The hazard corresponding to rising groundwater level depends on a number of factors related to the flood course, groundwater regime, geology, and topology of the protected area. The limit state approach is applied to the assessment and mapping of hazard induced by rising groundwater level in the area behind flood protection barriers, and the contributing factors are discussed, quantified, and incorporated into the limit state condition for topsoil layer uplift (UPL). An over-design factor is expressed as a function of the spatial coordinates (x, y). Data from geological and hydrogeological surveys and groundwater flow modelling are used to evaluate individual terms in the limit state condition. Uncertainties in the input data are expressed via partial factors. Data collection and their geographic information systems analysis completed with hydraulic modelling are crucial techniques in the hazard mapping of potential UPL during floods. The article includes a case study featuring a flood protection scheme for a shopping centre in the city of Brno, Czech Republic.

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Groundwater flooding in a river‐connected alluvial aquifer

Cited by 31 publications

References 28 publications

Reducing Urban Flood Risk Through Building- and Lot-Scale Flood Mitigation Approaches: Challenges and Opportunities

Reducing Urban Flood Risk Through Building- and Lot-Scale Flood Mitigation Approaches: Challenges and Opportunities

Compound flood modelling framework for rainfall-groundwater interactions

Mapping of uplift hazard due to rising groundwater level during floods

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