Run-up parameterization and beach vulnerability assessment on a barrier island: a downscaling approach

Medellín, Gabriela; Brinkkemper, Joost; Torres-Freyermuth, Alec; Appendini, Christian M.; Mendoza, Edgar; Salles, Paulo

doi:10.5194/nhess-16-167-2016

Cited by 30 publications

(38 citation statements)

References 42 publications

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“…The 600 selected sea states were found to adequately represent the whole sample, and were well distributed throughout the time series of sea level and wave parameters (Fig 4a-c). This is consistent with prior studies (Guanche et al, 2013;Medellín et al, 2016). …”

Section: Simulated Casessupporting

confidence: 94%

“…This numerical model solves the nonlinear shallow water equations, including the terms for non-hydrostatic pressure, which make it suitable for simulating wave transformation as a result of nonlinear wave-wave interactions in the surf and swash regions. The model is also capable of simulating wave-current interaction, wave breaking (Smit et al, 2013;de Bakker et al, 2015), wave 20 transformation on reefs (Torres-Freyermuth et al, 2012;Zijlema et al, 2012), and wave-runup (e.g., Brinkkemper et al, 2013;Ruju et al, 2014;Guimarao et al, 2015;Medellín et al, 2016). For further details, including model equations see (Zijlema et al, 2011).…”

Section: Numerical Model Validation 15mentioning

confidence: 99%

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The role of the reef-dune system in coastal protection in Puerto Morelos (Mexico)

Franklin

Torres-Freyermuth

Medellín

et al. 2017

Preprint

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Abstract. Reefs and sand dunes are critical morphological features providing natural coastal protection. Reefs dissipate around 90% of the incident wave energy through wave breaking, whereas sand dunes provide the final natural barrier against coastal flooding. The storm impact on coastal areas with these features depends on the relative elevation of the extreme water levels with respect to the sand dune morphology. However, despite the importance of the barrier reefs and dunes in 15 coastal protection, poor management practices have degraded these ecosystems, increasing their vulnerability to coastal flooding. The present study aims to investigate the role of the reef-dune system in coastal protection under current climatic conditions at Puerto Morelos, located in the Mexican Caribbean Sea. Firstly, a nonlinear non-hydrostatic numerical model (SWASH) is validated with experimental data from a physical model of a fringing reef. The numerical model predicts both energy transformation and runup statistics as compared with experimental results for two different reef crest geometries 20 conducted in a physical model. Thus, the numerical model is further used to investigate the role of the reef-dune degradation in coastal vulnerability. Wave hindcast information, tidal level, and a measured beach profile of the reef-dune system in Puerto Morelos are employed to predict extreme runup and estimate the storm impact scale for different scenarios. The numerical results show that ecosystem degradation has important implications for coastal protection against storms with return periods of less than 10 years. This highlights the importance of conservation of the system as a mitigation measure to 25 decrease coastal vulnerability and infrastructure losses in coastal areas in the short to medium term.

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Section: Simulated Casessupporting

confidence: 94%

Section: Numerical Model Validation 15mentioning

confidence: 99%

The role of the reef-dune system in coastal protection in Puerto Morelos (Mexico)

Franklin

Torres-Freyermuth

Medellín

et al. 2017

Preprint

Self Cite

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“…Others have addressed the impact of waves, including extreme events, erosion rates, morphological changes, flooding, and vulnerability of infrastructures but sometimes without including changes in sea level (see e.g. Ruju et al, 2012;Vera Guimarães et al, 2015;Medellin et al, 2016). Here we combine both, regional sea level and wave projections in the Western Mediterranean under two different climate scenarios for 2100, in line with works as Villatoro et al (2014).…”

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confidence: 74%

Changes in beach shoreline due to sea level rise and waves under climate change scenarios: application to the Balearic Islands (Western Mediterranean)

Enríquez¹,

Marcos²,

Álvarez-Ellacuría³

et al. 2016

Preprint

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Abstract. In this work we assess the impacts in reshaping coastlines as a result of sea level rise and changes in wave climate. The methodology proposed combines the SWAN and SWASH wave models to resolve the wave processes from deep waters up to the swash zone in two micro-tidal sandy beaches in Mallorca Island, Western Mediterranean. In a first step, the modelling approach is validated with observations from wave gauges and from the shoreline inferred from video monitoring stations, showing a good agreement between them. Afterwards, the modelling setup is applied to the 21st century sea level and wave projections under two different climate scenarios, RCP45 and RCP85. Sea level projections were retrieved from state of the art regional estimates, while wave projections were obtained from regional climate models. Changes in the coastline are explored under mean and extreme wave conditions. Our results indicate that the studied beaches would suffer a coastal retreat between 7 and up to 50 m, equivalent to half of the present-day aerial beach surface, under the climate scenarios considered.

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“…Given the wide (245 km) continental shelf and its mild slope (1/1000) [41], on the one hand, the wind-wave energy is dissipated far offshore [42], while on the other hand, the area is highly prone to being flooded by hurricane storm surges [1]. A detailed description of the characteristics of the study zone can be found in [3,43]. The study zone is boarded by city blocks, which are the smallest part of a town enclosed by streets (Figure 1, panel c).…”

Section: Study Areamentioning

confidence: 99%

Assessing Different Flood Risk and Damage Approaches: A Case of Study in Progreso, Yucatan, Mexico

Rey

Martínez-Amador

Salles

et al. 2020

JMSE

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This study applies three different methods to assess the flood risk and damage from the strongest high-pressure cold front (locally known as ‘Norte’) event in terms of the residual tide from 30 years (1979–2008) of data for Progreso, Yucatan. The most important difference between the three methods is the estimation of flood vulnerability for Progreso. The first method, proposed by Mexico’s National Center for the Prevention of Disasters (CENAPRED) and used by the Mexican government is based mostly on economic asset (household goods) values and flood impacts. The second (CENAPREDv2) and third (FRI) methods are proposals for assessing risk that include 17 socioeconomic indicators. The former includes economic asset values, as is the case for CENAPRED, while the latter does not. The main results of this study show that the modeled ‘Norte’ event flooded 25% of Progreso’s city blocks, with an estimated economic flood risk of $USD 16,266 (CENAPRED) and $USD 223,779 (CENAPREDv2), and flood damage of $USD 48,848 and $USD 671,918, respectively. When calculating flood risk (FRI) and flood damage (FRI_FD) without monetary terms, the risk categories along the back-barrier behind Progreso varied spatially from ‘very low’ to ‘high’, while areas along the coastal side presented a ‘low’ and ‘very low’ risk. These categories increased for the flood damage because the exceedance probability of the flood was not considered as it was for flood risk in the three methodologies. Therefore, flood damage provides the losses caused by a given flood event without considering how probable that loss may be. In conclusion, this study proposes that the selection of the applied method depends on the main objectives and specific interests when assessing flood risk. For instance, if economic damage is the main concern, then the CENAPRED method should be used as it identifies where the larger economic impacts could occur; when a socioeconomic approach is needed then the FRI should be applied, but if both economic damage and socioeconomic aspects are needed, the CENAPREDv2 is recommended. Besides considering economic aspects, the FRI method also includes social variables that can help to map the most vulnerable population in terms of mobility, education, communication access and others. Therefore, the proposed FRI method is very relevant for disaster risk managers and other stakeholders interested in disaster risk reduction.

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Run-up parameterization and beach vulnerability assessment on a barrier island: a downscaling approach

Cited by 30 publications

References 42 publications

The role of the reef-dune system in coastal protection in Puerto Morelos (Mexico)

The role of the reef-dune system in coastal protection in Puerto Morelos (Mexico)

Changes in beach shoreline due to sea level rise and waves under climate change scenarios: application to the Balearic Islands (Western Mediterranean)

Assessing Different Flood Risk and Damage Approaches: A Case of Study in Progreso, Yucatan, Mexico

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