Shoreline retreat and sediment release in response to accelerating sea level rise: Measuring and modelling cliffline dynamics on the Suffolk Coast, UK

Brooks, Susan; Spencer, Tom

doi:10.1016/j.gloplacha.2011.10.008

Cited by 41 publications

(21 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rosati et al, 2013;Dean and Houston, 2016] or developed new models [e.g. Brooks and Spencer, 2012;Ranasinghe et al, 2012] for the estimation of long-term shoreline change, the Bruun rule is still the viable model for the projection of future erosion due to SLR on a national scale. However, even using the Bruun rule, it can be difficult for projection on a national scale to determine the sediment size, beach slope, and/ or depth of closure at each coastal zone.…”

Section: Introductionmentioning

confidence: 99%

Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss

Udo

Takeda

2017

Coastal Engineering Journal

View full text Add to dashboard Cite

In this study, we projected the future beach loss in Japan's 77 coastal zones due to sea-level rise (SLR) based on representative concentration pathway (RCP) scenarios and 21 models of the Coupled Model Intercomparison Project Phase 5 (CMIP5). The beach-loss curve for SLR in Japan was constructed, and uncertainties associated with SLR projections and sediment sizes were evaluated. Beach-loss rates in the future (2081-2100) were projected to be 62% for the ensemble mean RCP2.6 scenario, 71% for RCP4.5, 73% for RCP6.0, and 83% for RCP8.5, and the rates projected by the CMIP5 models for RCP4.5 ranged widely from 61% to 87%. The effect of the spatial distribution of SLR in each CMIP5 model on beachloss rate in Japan is insignificant, while the effects of differences in the SLR values among RCP scenario and CMIP5 models are significant. The maximum uncertainties associated with sediment sizes (0.2--Q.6 mm) against the same SLR were assessed to be 38%. Despite significant uncertainties in the projected beach loss, results in the near future (2046--2065) reveal that the beach-loss rates between 18% and 79% differed by 60% in the near future and between 28% and 96% differed by 70% in the future. For the worst case scenario in the near future, the projected beach width is less than 10m in more than half of the 77 coastal zones, which would cause serious damage to coastal structures such as seawalls and revetments in beach areas. Thus, the development of effective measures to combat beach loss is critical for Japan's coastal management.

show abstract

Section: Introductionmentioning

confidence: 99%

Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss

Udo

Takeda

2017

Coastal Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Brooks and Spencer (2012) found that soft rock cliffs with high erosion rates along the Suffolk Coast, UK respond to sea level raise similar to the SCAPE approximation (Ashton et al 2011) where the change in retreat rate is proportional to the square root of the change in sea level. However, all predictions of shoreline response rely heavily on accurate measurements of baseline retreat (Brooks and Spencer 2012).…”

Section: Retreat Ratesmentioning

confidence: 71%

“…Causes of increase in retreat rates are unclear. Generally, long term changes in retreat rates have been linked to increasing sea level (Brooks and Spencer 2012). This effect has not yet been examined in the Minas Basin.…”

Section: Retreat Ratesmentioning

confidence: 99%

Coastal retreat rates and sediment input to the Minas Basin, Nova Scotia

et al. 2017

View full text Add to dashboard Cite

The strong tidal currents of the Minas Passage in the Bay of Fundy, Nova Scotia, have made this area an important site for testing and development of tidal power technologies. Understanding sediment processes in this area is essential for determining the impacts that large-scale tidal power extraction would have on the system. Previous estimates of sediment input to the Basin suggest that much more sediment enters the Basin than accumulates within it; therefore, the bottom sediment texture should be in hydrodynamic equilibrium with bottom currents. A recent study, however, showed that sediment texture is generally finer that what was expected based on current speeds. This paper uses geographic information systems methods to provide updated and more highly resolved measurements of the amount of sediment entering the Minas Basin from the dominant source, which is coastal erosion. Volumetric input from coastal erosion is 1.1 × 106 m3·a−1, which is more than two times smaller than previous estimates. This updated value makes input rates comparable to accumulation rates, and agrees with the hypothesis that bottom sediment texture is not in equilibrium with current speeds. Grain-size distributions also support the hypothesis that the Minas Basin acts as a sediment trap.

show abstract

“…However, it is clear from both historic maps and aerial photographs (see Fig. 6, Brooks & Spencer, 2012) that the gravel barrier crests on the Suffolk coast are broadly aligned with the cliffed sections that lie to either side of the broads. The precise processes of inland migration of the shoreline remain to be quantified and evaluated, but given that in every historic map and aerial photograph available since 1883 this alignment is evident, the migration of the cliffline reflects the migration of the barrier.…”

Section: Shoreline Response Modelsmentioning

confidence: 98%

“…For the second stage of analysis, we evaluated a range of different shoreline response models; full details are reported elsewhere (Brooks & Spencer, 2012). Clear and unambiguous definition of the exact position of broad, convex gravel barrier crests in sequences of aerial photographs is very difficult to achieve [see Moore (2000) for further discussion on shoreline definition and mapping].…”

Section: Shoreline Response Modelsmentioning

confidence: 99%

Methodologies for measuring and modelling change in coastal saline lagoons under historic and accelerated sea-level rise, Suffolk coast, eastern England

Spencer

Brooks

2012

Hydrobiologia

View full text Add to dashboard Cite

Thorough assessment of vulnerable coastal habitats, impacted by sea-level rise and anthropogenic pressures, requires both the accurate establishment of the evidence base for current status and scientifically-informed forward planning of expected future status. Coastal saline lagoons are transitional, ephemeral habitats of considerable conservation interest; under European legislation their status requires on-going maintenance of 'favourable status'. Over decadal timescales, the seaward barriers that enclose saline lagoons migrate progressively landwards. Geo-referenced and digitised historic maps and aerial photographs are used to create a detailed trajectory of barrier migration and loss of lagoon area for three saline 'broads' on the rapidly retreating coastline of Suffolk, eastern England. The SCAPE shoreline response model is then employed to extend this trajectory, under a range of sea-level rise scenarios, to 2050 and 2095 and to predict saline lagoon 'time to extinction'. Loss rates are likely to accelerate considerably after 2015 and a fundamental revision of UK saline lagoon creation targets is urgently required. The approach is generic and could be used to assess the evolutionary trajectories for other vulnerable coastal habitats, under a range of near-future environmental change scenarios.

show abstract

Shoreline retreat and sediment release in response to accelerating sea level rise: Measuring and modelling cliffline dynamics on the Suffolk Coast, UK

Cited by 41 publications

References 55 publications

Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss

Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss

Coastal retreat rates and sediment input to the Minas Basin, Nova Scotia

Methodologies for measuring and modelling change in coastal saline lagoons under historic and accelerated sea-level rise, Suffolk coast, eastern England

Contact Info

Product

Resources

About