13 Quantitative assessment of driver impacts on future flood risk in England and Wales

Sayers, Paul; Panzeri, M.; Deakin, R. E.

doi:10.1680/ffacer.34495.0013

Cited by 2 publications

(4 citation statements)

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“…and coastal property may be very valuable (Hinton et al, 2007). Driven by projected increases of sea levels, more intense rainfall, and stronger wind speeds, flood risks are anticipated to increase in the future (Hall et al, 2007). Coastal flood defences have been built in some areas to protect housing, businesses or infrastructure and emphasis is increasingly being focussed on their sustainability in the light of future sea level rise (SLR) e.g.…”

Section: Introductionmentioning

confidence: 99%

Coastal flooding: impacts of coupled wave–surge–tide models

Wolf

2008

Nat Hazards

148

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Wind waves and elevated water levels together can cause flooding in low-lying coastal areas, where the water level may be a combination of mean sea level, tides and surges generated by storm events. In areas with a wide continental shelf a travelling external surge may combine with the locally generated surge and waves and there can be significant interaction between the propagation of the tide and surge. Wave height at the coast is controlled largely by water depth so the effect of tides and surges on waves must be also be considered, while waves contribute to the total water level by means of wave setup through radiation stress. These processes are well understood and accurately predicted by models, assuming good bathymetry and wind forcing is available. Other interactions between surges and waves include the processes of surface wind-stress and bottom friction as well as depth and current refraction of waves by surge water levels and currents, and some of the details of these processes are still not well understood. The recent coastal flooding in Myanmar (May 2008) in the Irrawaddy River Delta is an example of the severity of such events, with a surge of over 3m exacerbated by heavy precipitation. Here we review the existing capability for combined modelling of tides, surges and waves, their interactions and the development of coupled models.Keywords: tides, storm surges, wind waves, coastal flooding, wave-current interaction, numerical modelling 1 Coastal Flooding -Impacts of coupled wave-surge-tide models Judith Wolf AbstractWind waves and elevated water levels together can cause flooding in low-lying coastal areas, where the water level may be a combination of mean sea level, tides and surges with storm surges and waves often being generated by the same storm event. In areas with a wide continental shelf a travelling external surge may combine with the locally generated surge and waves and there can be significant interaction between the propagation of the tide and surge. Wave height at the coast is controlled largely by water depth so the effect of tides and surges on waves must be also be considered, while waves contribute to the total water level by means of wave setup through radiation stress. These processes are well understood and accurately predicted by models, assuming good bathymetry and wind forcing is available. Other interactions between surges and waves include the processes of surface wind-stress and bottom friction as well as depth and current refraction of waves by surge water levels and currents, and some of the details of these processes are still not well understood. The recent coastal flooding in Myanmar (May 2008) in the Irrawaddy River Delta is an example of the severity of such events, with a surge of over 3m exacerbated by heavy precipitation. Here we review the existing capability for combined modelling of tides, surges and waves, their interactions and the development of coupled models.

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Section: Introductionmentioning

confidence: 99%

Coastal flooding: impacts of coupled wave–surge–tide models

Wolf

2008

Nat Hazards

148

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“…There is a concern that, due to global warming, mean sea level will rise and the intensity of storms may increase and hence the incidence of coastal flooding may also increase. There is also an increased risk due to socio-economic factors leading to more people to live in flood risk areas (coastal and flood plains), see e.g Hall et al (2007). The UK, in common with many other countries, has assets worth billions of pounds at risk from coastal floods, river floods, and coastal erosion.…”

Section: Introductionmentioning

confidence: 99%

“…The UK government Department of Food and Rural Affairs (DE-FRA) sets the policy on coastal flooding with the Environment Agency (EA) as its operational agency. The EA introduced a national flood and coastal defence database in 2003 (Hall et al, 2007). The UK storm tide forecasting service (STFS) runs operational forecasts of sea level due to tides and surges twice daily at the UK Met Office which may lead to evacuation of low-lying coastal areas if necessary e.g.…”

Section: Introductionmentioning

confidence: 99%

“…on 9 November 2007 (http://www.metoffice.gov.uk/corporate/ pressoffice/2007/pr20071109.html). Hall et al (2007) also address the quantification of future flood risk for England and Wales. Previously it was assumed that flood statistics were stationary; now it is recognized that there is a trend in sea level and possibly in wind forcing and flood management rather than flood prevention is the priority.…”

Section: Introductionmentioning

confidence: 99%

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Coupled wave and surge modelling and implications for coastal flooding

Wolf

2008

Adv. Geosci.

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Abstract. The physical causes of coastal flooding due to marine storms are discussed. We examine the costs and impacts of storm surges and waves with reference to the UK. The mechanisms of interaction between waves and the mean circulation due to tides and wind are reviewed. A case study to illustrate the magnitude of surges, waves and their interactions is presented for Liverpool Bay in the eastern Irish Sea. Applications of surge and wave models to the Mediterranean, especially the Adriatic Sea, are considered.

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13 Quantitative assessment of driver impacts on future flood risk in England and Wales

Cited by 2 publications

References 0 publications

Coastal flooding: impacts of coupled wave–surge–tide models

Coastal flooding: impacts of coupled wave–surge–tide models

Coupled wave and surge modelling and implications for coastal flooding

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