Adaptation of coastal structures to mean sea level rise

Sergent, Philippe; Prevot, Guirec; Mattarolo, Giovanni; Brossard, J.; Morel, Gilles; Mar, Fatou; Benoît, Michel; Ropert, François; Kergadallan, Xavier; Trichet, Jean-Jacques; Mallet, Pascal

doi:10.1051/lhb/2014063

Cited by 10 publications

(10 citation statements)

References 3 publications

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“…Many low-lying, exposed coastal areas are currently protected by levees or other defenses designed to withstand historical storm conditions. However, these defenses provide marginal protection against SLR and even less protection against the combined effects of storms and SLR, as most were designed without allowances for future conditions 26 . Our results demonstrate that many sensitive areas may be overwhelmed during storm conditions combined with small amounts of SLR expected within just a few decades (Fig.…”

Section: Resultsmentioning

confidence: 99%

Dynamic flood modeling essential to assess the coastal impacts of climate change

Barnard

Erikson

Foxgrover

et al. 2019

Sci Rep

139

107

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Coastal inundation due to sea level rise (SLR) is projected to displace hundreds of millions of people worldwide over the next century, creating significant economic, humanitarian, and national-security challenges. However, the majority of previous efforts to characterize potential coastal impacts of climate change have focused primarily on long-term SLR with a static tide level, and have not comprehensively accounted for dynamic physical drivers such as tidal non-linearity, storms, short-term climate variability, erosion response and consequent flooding responses. Here we present a dynamic modeling approach that estimates climate-driven changes in flood-hazard exposure by integrating the effects of SLR, tides, waves, storms, and coastal change (i.e. beach erosion and cliff retreat). We show that for California, USA, the world’s 5th largest economy, over $150 billion of property equating to more than 6% of the state’s GDP and 600,000 people could be impacted by dynamic flooding by 2100; a three-fold increase in exposed population than if only SLR and a static coastline are considered. The potential for underestimating societal exposure to coastal flooding is greater for smaller SLR scenarios, up to a seven-fold increase in exposed population and economic interests when considering storm conditions in addition to SLR. These results highlight the importance of including climate-change driven dynamic coastal processes and impacts in both short-term hazard mitigation and long-term adaptation planning.

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Section: Resultsmentioning

confidence: 99%

Dynamic flood modeling essential to assess the coastal impacts of climate change

Barnard

Erikson

Foxgrover

et al. 2019

Sci Rep

139

107

View full text Add to dashboard Cite

show abstract

“…They are also used to anticipate the upgrade of defence works in coastal areas, which will be necessary to control safety levels despite sea level rise, demographic growth and land use pressure [32,36,89,90]. Moreover, other products are emerging: for example, coastal engineers not only design coastal defences that anticipate future upgrades [117], but also perform vulnerability assessments for existing infrastructure, which may have already experienced changing sea levels over a century or more [100].…”

Section: Lack Of Formalized Requirements From End-usersmentioning

confidence: 99%

Sea Level Change and Coastal Climate Services: The Way Forward

Cozannet

Nicholls

Hinkel

et al. 2017

JMSE

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For many climate change impacts such as drought and heat waves, global and national frameworks for climate services are providing ever more critical support to adaptation activities. Coastal zones are especially in need of climate services for adaptation, as they are increasingly threatened by sea level rise and its impacts, such as submergence, flooding, shoreline erosion, salinization and wetland change. In this paper, we examine how annual to multi-decadal sea level projections can be used within coastal climate services (CCS). To this end, we review the current state-of-the art of coastal climate services in the US, Australia and France, and identify lessons learned. More broadly, we also review current barriers in the development of CCS, and identify research and development efforts for overcoming barriers and facilitating their continued growth. The latter includes: (1) research in the field of sea level, coastal and adaptation science and (2) cross-cutting research in the area of user interactions, decision making, propagation of uncertainties and overall service architecture design. We suggest that standard approaches are required to translate relative sea level information into the forms required to inform the wide range of relevant decisions across coastal management, including coastal adaptation.

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“…The marine conditions that were available to us for the Deauville port area represent daily data for joint offshore waves and sea levels under high-tide conditions, for a period of 10 4 years [84,85]. The aforementioned database has been created combining the method of Hawkes et al [86] to model the relationship of simultaneous wave and surge observations with Monte Carlo simulation [84].…”

Section: Upgrading Of a Rubble Mound Breakwater In The Port Of Deauvillementioning

confidence: 99%

Optimized Reliability Based Upgrading of Rubble Mound Breakwaters in a Changing Climate

Γαλιατσάτου¹,

Makris²,

Prinos³

2018

JMSE

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The present work aims at presenting an approach on implementing appropriate mitigation measures for the upgrade of rubble mound breakwaters protecting harbors and/or marinas against increasing future marine hazards and related escalating exposure to downtime risks. This approach is based on the reliability analysis of the studied structure coupled with economic optimization techniques. It includes the construction of probability distribution functions for all the stochastic variables of the marine climate (waves, storm surges, and sea level rise) for present and future conditions, the suggestion of different mitigation options for upgrading, the construction of a fault tree providing a logical succession of all events that lead to port downtime for each alternative mitigation option, and conclusively, the testing of a large number of possible alternative geometries for each option. A single solution is selected from the total sample of acceptable geometries for each upgrading concept that satisfy a probabilistic constraint in order to minimize the total costs of protection. The upgrading options considered in the present work include the construction or enhancement of a crown wall on the breakwater crest, the addition of the third layer of rocks above the primary armor layer of the breakwater (combined with crest elements), the attachment of a berm on the primary armor layer, and the construction of a detached low-crested structure in front of the breakwater. The proposed methodology is applied to an indicative rubble mound breakwater with an existing superstructure. The construction of a berm on the existing primary armor layer of the studied breakwater (port of Deauville, France), seems to be advantageous in terms of optimized total costs compared to other mitigation options.

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Adaptation of coastal structures to mean sea level rise

Cited by 10 publications

References 3 publications

Dynamic flood modeling essential to assess the coastal impacts of climate change

Dynamic flood modeling essential to assess the coastal impacts of climate change

Sea Level Change and Coastal Climate Services: The Way Forward

Optimized Reliability Based Upgrading of Rubble Mound Breakwaters in a Changing Climate

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