Coastal flood analysis and visualisation for a small town

Wadey, Matthew P.; Cope, Samantha; Nicholls, Robert J.; McHugh, Karen; Grewcock, Gareth; Mason, Travis

doi:10.1016/j.ocecoaman.2015.07.028

Cited by 32 publications

(19 citation statements)

References 37 publications

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“…During the event, uncharacteristically large non-tidal residuals were observed by the tide gauges across the Solent (Wadey et al, 2015a), including the presence of high-energy sea-level oscillations at periods of <6 hours. Our study has two main objectives: (i) to identify and characterize highfrequency sea level variations in the Solent and evaluate their contribution to coastal floods, and (ii) to provide a detailed assessment of the event of 28 th October 2013 within this broader context.…”

Section: Introductionmentioning

confidence: 99%

High-frequency sea level variations and implications for coastal flooding: A case study of the Solent, UK

Ozsoy

Haigh

Wadey

et al. 2016

Continental Shelf Research

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This study examines the occurrence and characteristics of high-frequency (<6 hour) sea level variations in the Solent, UK -a mesotidal estuarine strait located in the central English Channel. A 14-year time series (2000-2013) of sea level observations sampled at 15-minute intervals from the Southampton tide gauge was analyzed. The 8 highest-energy events have a mean amplitude of approximately 0.6 m and a dominant period of around 4 hours. These events correspond with periods of enhanced meteorological activity, namely a marked reduction in air pressure and onset of strong southwesterly-southeasterly winds. Sea level observations from tide gauges around the Solent and the wider English Channel region (23 in total) were used to assess the spatial characteristics of these events. Analysis of time series and phase information indicates the occurrence of standing waves oscillating across the English Channel between southern England and northern France. This study provides a unique example of standing waves generated by extra-tropical cyclones over a large basin (the English Channel) with implications for flood inundation. The event of 28 th October 2013 -the highest-amplitude (1.16 m) event in the record -was associated with minor coastal flooding atYarmouth, Isle of Wight. This flood occurred during a neap tide, when such events are widely thought to be impossible. Hence, our findings emphasize the relevance of high-frequency sea level variability for regional sea level forecasting and flood risk management.

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Section: Introductionmentioning

confidence: 99%

High-frequency sea level variations and implications for coastal flooding: A case study of the Solent, UK

Ozsoy

Haigh

Wadey

et al. 2016

Continental Shelf Research

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“…On 10 March 2008 a storm surge, high tide and waves in the English channel led to significant coastal flooding in the Solent area (Wadey et al, 2013). The storms and high tides of the 2013-2014 winter caused a number of coastal flood events (Wadey et al, 2015). The study area has been zoned for flood "risk" by the UK Environment Agency for a 1 : 200 year extreme event assuming that no flood defences are present (Fig.…”

Section: Case Study Sitementioning

confidence: 99%

Estimating the long-term historic evolution of exposure to flooding of coastal populations

Stevens

Clarke

Nicholls

et al. 2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Coastal managers face the task of assessing and managing flood risk. This requires knowledge of the area of land, the number of people, properties and other infrastructure potentially affected by floods. Such analyses are usually static; i.e. they only consider a snapshot of the current situation. This misses the opportunity to learn about the role of key drivers of historical changes in flood risk, such as development and population rise in the coastal flood plain, as well as sea-level rise.In this paper, we develop and apply a method to analyse the temporal evolution of residential population exposure to coastal flooding. It uses readily available data in a GIS environment. We examine how population and sea-level change have modified exposure over two centuries in two neighbouring coastal sites: Portsea and Hayling Islands on the UK south coast. The analysis shows that flood exposure changes as a result of increases in population, changes in coastal population density and sea level rise. The results indicate that to date, population change is the dominant driver of the increase in exposure to flooding in the study sites, but climate change may outweigh this in the future. A full analysis of changing flood risk is not possible as data on historic defences and wider vulnerability are not available. Hence, the historic evolution of flood exposure is as close as we can get to a historic evolution of flood risk.The method is applicable anywhere that suitable floodplain geometry, sea level and population data sets are available and could be widely applied, and will help inform coastal managers of the time evolution in coastal flood drivers.

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“…Banjir merupakan salah satu jenis bencana alam yang tidak dapat diprediksi kedatangannya dan menjadi permasalahan umum di banyak Negara. Sejauh ini banjir diakibatkan oleh proses yang berhubungan dengan tinggi permukaan laut dan arus air (Meesuk, 2012, Wadey, 2015. Pemerintah Kota Surabaya mulai melakukan analisis terhadap data curah hujan serta tinggi permukaan air setiap periodenya (Saud, 2007).…”

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Prediksi Tinggi Muka Air (TMA) Untuk Deteksi Dini Bencana Banjir Menggunakan SVR-TVIWPSO

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Cholissodin²,

Wihandika³

et al. 2015

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Coastal flood analysis and visualisation for a small town

Cited by 32 publications

References 37 publications

High-frequency sea level variations and implications for coastal flooding: A case study of the Solent, UK

High-frequency sea level variations and implications for coastal flooding: A case study of the Solent, UK

Estimating the long-term historic evolution of exposure to flooding of coastal populations

Prediksi Tinggi Muka Air (TMA) Untuk Deteksi Dini Bencana Banjir Menggunakan SVR-TVIWPSO

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