Volume-duration growth curves for flood estimation in permeable catchments

Bradford, R. B.

doi:10.5194/hess-6-939-2002

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Hence, the water can be distributed through the sewerage into areas outside of the inundation. Due to these complex processes it is difficult to forecast the dynamics of groundwater rise during flood situations (Bradford, 2002).…”

Section: Introductionmentioning

confidence: 99%

Extent, perception and mitigation of damage due to high groundwater levels in the city of Dresden, Germany

Kreibich

Thieken

Grunenberg

et al. 2009

Nat. Hazards Earth Syst. Sci.

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Abstract. Flood risk analysis and management plans mostly neglect groundwater flooding, i.e. high groundwater levels. However, rising groundwater may cause considerable damage to buildings and infrastructure. To improve the knowledge about groundwater flooding and support risk management, a survey was undertaken in the city of Dresden (Saxony, Germany), resulting in 605 completed interviews with private households endangered by high groundwater levels. The reported relatively low flood impact and damage of groundwater floods in comparison with mixed floods was reflected by its scarce perception: Hardly anybody thinks about the risk of groundwater flooding. The interviewees thought that public authorities and not themselves, should be mainly responsible for preparedness and emergency response. Up to now, people do not include groundwater risk in their decision processes on self protection. The implementation of precautionary measures does not differ between households with groundwater or with mixed flood experience. However, less households undertake emergency measures when expecting a groundwater flood only. The state of preparedness should be further improved via an intensified risk communication about groundwater flooding by the authorities. Conditions to reach the endangered population are good, since 70% of the interviewed people are willing to inform themselves about groundwater floods. Recommendations for an improved risk communication are given.

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Section: Introductionmentioning

confidence: 99%

Extent, perception and mitigation of damage due to high groundwater levels in the city of Dresden, Germany

Kreibich

Thieken

Grunenberg

et al. 2009

Nat. Hazards Earth Syst. Sci.

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“…High soil infiltration rates mean that runoff generation is generally limited in these landscapes (Martínez-Mena et al, 1998), although there are settings where runoff can be significant, for example, where small outcrops of low permeability bedrock or superficial deposits occur (Jencso & McGlynn, 2011). Although direct runoff is one of the forms of flooding in permeable catchments (Bradford, 2002), flood events are typically groundwater driven. Flooding is most commonly the result of groundwater-fed fluvial flooding and abnormally high groundwater levels (gwls) away from the perennial river channel that cause inundation of subsurface infrastructure or the discharge of groundwater at surface (Collins et al, 2020;Gotkowitz et al, 2014;Hughes et al, 2011;Macdonald et al, 2008Macdonald et al, , 2012Naughton et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Modelling the effectiveness of land‐based natural flood management in a large, permeable catchment

Collins

Verhoef

Mansour

et al. 2023

J Flood Risk Management

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In the United Kingdom, woodland planting and soil and crop management are being promoted as approaches to tackling flooding. Although evidence is limited, it is thought tree planting and regenerative agriculture practices such as crop-herbal ley pasture rotations increase infiltration, soil water storage and evapotranspiration, potentially reducing flooding. A process-based soil-watervegetation model was coupled with a semi-distributed groundwater model to explore the impact of these interventions on peak and low flows in a large, groundwater-dominated catchment. Land use change and management were found to have limited potential to reduce flooding in this setting. Herbal leycrop rotations produced a <1% reduction in flow for return periods >2 years, and levels of woodland planting judged to be the realistic maximum produced reductions of 0.2%-2.6%, depending on tree species. Broadscale spruce planting was the only scenario to produce significant reductions in peak flow (16.0%-24.7% at return periods 1-15 years); however, the level of spruce planting required to achieve these reductions was estimated to reduce Q95 flow by $39%, which would likely have negative implications for water security and ecological river flows. The impact of land-based natural flood management interventions for flood prevention in large, permeable catchments should not be overstated.

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“…Groundwater floods are events limited to prolonged rainfall in low-elevation karst watersheds characterized by unconfined aquifers that experience sudden increases in already high water table levels above normal conditions (Finch et al, 2004). Although there has been a substantial increase in groundwater flooding literature since the 2000s, as well as advances in understanding surface-water-groundwater interactions (Brunner et al, 2017;Sophocleous, 2002), relevant knowledge gaps and lack of understanding of this phenomenon persist from the complex relationship between topography and hydrogeology (Bradford, 2002;Hughes et al, 2011;Ó Dochartaigh et al, 2019). The water table response time to hydrological events is controlled by the soil, vegetation and aquifer properties, which influence the infiltration capacity, recharge rate and response time (Nalesso, 2009).…”

Section: Introductionmentioning

confidence: 99%

Compound flood modeling framework for surface–subsurface water interactions

Peña

Nardi

Melesse

et al. 2022

Nat. Hazards Earth Syst. Sci.

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Abstract. Compound floods are an active area of research in which the complex interaction between pluvial, fluvial, coastal and 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 lower severity with respect to other types of flooding. This paper presents a physics-based, loosely coupled modeling framework using FLO-2D and MODFLOW-2005 that is capable of simulating surface–subsurface water interactions. FLO-2D, responsible for 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 returns exchange flow to the surface when the groundwater heads are higher than the surface depth. Three events characterized by short-duration intense precipitation, average tide levels and unusually high water table levels are used to assess the relevance of groundwater flooding in the Arch Creek Basin, a locality in North Miami particularly prone to flooding conditions. Due to limitations in water level observations, the model was calibrated based on properties that have experienced repetitive flooding losses and validated using image-based volunteer geographic information (VGI). Results suggest that groundwater-induced flooding is localized, and high groundwater heads influence pluvial flooding as the shallow water table undermines the soil infiltration capacity. 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 to infrastructure. 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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Volume-duration growth curves for flood estimation in permeable catchments

Cited by 5 publications

References 2 publications

Extent, perception and mitigation of damage due to high groundwater levels in the city of Dresden, Germany

Extent, perception and mitigation of damage due to high groundwater levels in the city of Dresden, Germany

Modelling the effectiveness of land‐based natural flood management in a large, permeable catchment

Compound flood modeling framework for surface–subsurface water interactions

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