Decadal-scale variation in dune erosion and accretion rates: An investigation of the significance of changing storm tide frequency and magnitude on the Sefton coast, UK

Pye, Kenneth; Blott, Simon J.

doi:10.1016/j.geomorph.2008.06.011

Cited by 119 publications

(107 citation statements)

References 23 publications

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“…However, the occurrence of the 5 December 2008 storm during neap tides illustrates well that storm impacts on Rossbeigh are highly dependent on water level. Similarly, Pye and Blott (2008) and Esteves et al (2011) show that dune erosion is strongly correlated with elevated water levels and/or storm duration along the Sefton coast in northwest England.…”

Section: Part 2: 1d Xbeachmentioning

confidence: 83%

Modelling storm responses on a high-energy coastline with XBeach

Williams

Esteves

Rochford

2015

Model. Earth Syst. Environ.

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The XBeach model has been used to simulate the morphological impacts of storms on sandy and gravel beaches. Taking as a case study Rossbeigh Spit located on the high-energy coast of western Ireland, the study reported here tests the capacity of XBeach to reproduce barrier breaching during a storm in December 2008. It demonstrates that predictions of the breaching event agree reasonably well with observations. However, the main focus of the paper is to establish using the model results, sitespecific critical wave and water level conditions giving rise to dune erosion, overwashing and breaching. By deriving simple-to-use expressions to define hydrodynamic thresholds the study advances the ability to predict the impacts of infrequent and rarely observed storm events and is considered to provide useful coastal management tool for assessing the vulnerability of sandy barriers to breaching high-energy during storms.

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Section: Part 2: 1d Xbeachmentioning

confidence: 83%

Modelling storm responses on a high-energy coastline with XBeach

Williams

Esteves

Rochford

2015

Model. Earth Syst. Environ.

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“…The offshore grid resolution was 50 m while the minimum grid size in the beach/dune region was about 1 m in order to accurately represent the bed topography. In this cross section, the dune toe is located at around 4.8 m ODN (Pye and Blott, 2008). Survey data collected on 9 December 2013 suggest that an erosion of 4 m occurred at the dune frontage of this transect during the D1 storm.…”

Section: Model Domainmentioning

confidence: 87%

“…The wind climate within this region and the convex coastline geometry cause waves to focus on Formby Point, located at the coastal apex, while the net onshore tidal transport of sediment diverges into a net north and south littoral drift at this point (Pye and Neal, 1994). Formby Point therefore experiences a negative sediment supply, making it susceptible to storm-driven erosion (Pye and Blott, 2008). Dune retreat of up to 20 m has been observed along the Sefton coast and at Formby Point.…”

Section: Study Area: Formby Pointmentioning

confidence: 99%

Impacts of storm chronology on the morphological changes of the Formby beach and dune system, UK

Dissanayake

Brown

Karunarathna

2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Impacts of storm chronology within a storm cluster on beach/dune erosion are investigated by applying the state-of-the-art numerical model XBeach to the Sefton coast, northwest England. Six temporal storm clusters of different storm chronologies were formulated using three storms observed during the 2013/2014 winter. The storm power values of these three events nearly halve from the first to second event and from the second to third event. Cross-shore profile evolution was simulated in response to the tide, surge and wave forcing during these storms. The model was first calibrated against the available post-storm survey profiles. Cumulative impacts of beach/dune erosion during each storm cluster were simulated by using the post-storm profile of an event as the pre-storm profile for each subsequent event. For the largest event the water levels caused noticeable retreat of the dune toe due to the high water elevation. For the other events the greatest evolution occurs over the bar formations (erosion) and within the corresponding troughs (deposition) of the upper-beach profile. The sequence of events impacting the size of this ridge-runnel feature is important as it consequently changes the resilience of the system to the most extreme event that causes dune retreat. The highest erosion during each single storm event was always observed when that storm initialised the storm cluster. The most severe storm always resulted in the most erosion during each cluster, no matter when it occurred within the chronology, although the erosion volume due to this storm was reduced when it was not the primary event. The greatest cumulative cluster erosion occurred with increasing storm severity; however, the variability in cumulative cluster impact over a beach/dune cross section due to storm chronology is minimal. Initial storm impact can act to enhance or reduce the system resilience to subsequent impact, but overall the cumulative impact is controlled by the magnitude and number of the storms. This model application provides inter-survey information about morphological response to repeated storm impact. This will inform local managers of the potential beach response and dune vulnerability to variable storm configurations.

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“…For instance, coastal dunes are most affected by sediment loss from the beach, because wave run-up reaches higher distances on the backshore up to the base of the dunes [3]. This implies huge volume loss and dune retreat or destruction [4][5][6] and consequently severe problems for the vegetation [7][8][9]. In general terms, coastal erosion occurs in sediment-starving settings: the particles naturally feeding a specific sector of coast no longer compensate those that are wiped out by waves and currents.…”

Section: Introductionmentioning

confidence: 99%

A Wireless Sensor Network Framework for Real-Time Monitoring of Height and Volume Variations on Sandy Beaches and Dunes

Pozzebon

Andreadis

Bertoni

et al. 2018

IJGI

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Abstract:In this paper, the authors describe the realization and testing of a Wireless Sensor Network (WSN) framework aiming at measuring, remotely and in real time, the level variations of the sand layer of sandy beaches or dunes. The proposed framework is based on an innovative low cost sensing structure, able to measure the level variations with a 5-cm degree of precision and to locally transfer the acquired data through the ZigBee protocol. The described sensor is integrated in a wider ZigBee wireless sensor network architecture composed of an array of sensors that, arranged according to a grid layout, can acquire the same data at different points, allowing the definition of a dynamic map of the area under study. The WSN is connected to a local Global System for Mobile Communications (GSM) gateway that is in charge of data processing and transmission to a cloud infrastructure through a General Packet Radio Service (GPRS) connection. Data are then stored in a MySQL database and made available any time and anywhere through the Internet. The proposed architecture has been tested in a laboratory, to analyze data acquisition, processing timing and power consumption and then in situ to prove the effectiveness of the system. The described infrastructure is expected to be integrated in a wider IoT architecture including different typologies of sensors, in order to create a multi-purpose tool for the study of coastal erosive processes.

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Decadal-scale variation in dune erosion and accretion rates: An investigation of the significance of changing storm tide frequency and magnitude on the Sefton coast, UK

Cited by 119 publications

References 23 publications

Modelling storm responses on a high-energy coastline with XBeach

Modelling storm responses on a high-energy coastline with XBeach

Impacts of storm chronology on the morphological changes of the Formby beach and dune system, UK

A Wireless Sensor Network Framework for Real-Time Monitoring of Height and Volume Variations on Sandy Beaches and Dunes

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