Modelling coastal erosion: A case study of Yarada beach near Visakhapatnam, east coast of India

Ramakrishnan, R.; Remya, P. G.; Nagakumar, K.Ch.V.; Demudu, G.; Rajawat, A. S.; Nair, Balakrishnan; Rao, K. Nageswara

doi:10.1016/j.ocecoaman.2017.08.013

Cited by 28 publications

(6 citation statements)

References 18 publications

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“…XBeach has been used in numerous studies investigating wave transformation [57,58], swash processes [46,54,59], and morphology change [55,56,[60][61][62]. Originally developed for assessing impacts from discrete storm events, the model has more recently been applied to simulate marine-driven morphologic changes on time scales of weeks to years [53,63,64]. An overview of relevant processes and model parameters for XBeach are described below, while a full description of the model and its formulations can be found in Roelvink et al [52] and Roelvink et al [65].…”

Section: Xbeachmentioning

confidence: 99%

Exploring Marine and Aeolian Controls on Coastal Foredune Growth Using a Coupled Numerical Model

Cohn

Hoonhout

Goldstein

et al. 2019

JMSE

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Coastal landscape change represents aggregated sediment transport gradients from spatially and temporally variable marine and aeolian forces. Numerous tools exist that independently simulate subaqueous and subaerial coastal profile change in response to these physical forces on a range of time scales. In this capacity, coastal foredunes have been treated primarily as wind-driven features. However, there are several marine controls on coastal foredune growth, such as sediment supply and moisture effects on aeolian processes. To improve understanding of interactions across the land-sea interface, here the development of the new Windsurf-coupled numerical modeling framework is presented. Windsurf couples standalone subaqueous and subaerial coastal change models to simulate the co-evolution of the coastal zone in response to both marine and aeolian processes. Windsurf is applied to a progradational, dissipative coastal system in Washington, USA, demonstrating the ability of the model framework to simulate sediment exchanges between the nearshore, beach, and dune for a one-year period. Windsurf simulations generally reproduce observed cycles of seasonal beach progradation and retreat, as well as dune growth, with reasonable skill. Exploratory model simulations are used to further explore the implications of environmental forcing variability on annual-scale coastal profile evolution. The findings of this work support the hypothesis that there are both direct and indirect oceanographic and meteorological controls on coastal foredune progradation, with this new modeling tool providing a new means of exploring complex morphodynamic feedback mechanisms.

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Section: Xbeachmentioning

confidence: 99%

Exploring Marine and Aeolian Controls on Coastal Foredune Growth Using a Coupled Numerical Model

Cohn

Hoonhout

Goldstein

et al. 2019

JMSE

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“…Despite this procedure offers a feasible approach to coastal flooding and erosion, it must be taken into account that there are still some uncertainties that limit its applicability. In general, simulations reproduce qualitatively the observed erosion and accretion patterns, but post-storm bathymetry has associated a high degree of uncertainty [32,33].…”

Section: (Iii)mentioning

confidence: 85%

“…In these cases and for a local scale of analysis (hundreds of meters to few km), it might be convenient to implement a two-dimensional numerical model such as XBeach 2DH [29]. This model has already been used in several worldwide locations to assess the storm impact (flooding and erosion) on sandy beaches [31][32][33][34].Storm-induced risk assessment can be assessed with different tools ranging from the regional to the hotspot scale [35]. For instance, a fast scanning method based on simple formulations (CRAFT1) may identify hotspots at the regional scale (10-100 km).…”

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confidence: 99%

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Coastal Flooding and Erosion under a Changing Climate: Implications at a Low-Lying Coast (Ebro Delta)

Grases

Gràcia

Garcı́a-León

et al. 2020

Water

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Episodic coastal hazards associated to sea storms are responsible for sudden and intense changes in coastal morphology. Climate change and local anthropogenic activities such as river regulation and urban growth are raising risk levels in coastal hotspots, like low-lying areas of river deltas. This urges to revise present management strategies to guarantee their future sustainability, demanding a detailed diagnostic of the hazard evolution. In this paper, flooding and erosion under current and future conditions have been assessed at local scale at the urban area of Riumar, a touristic enclave placed at the Ebro Delta (Spain). Process-based models have been used to address the interaction between beach morphology and storm waves, as well as the influence of coastal environment complexity. Storm waves have been propagated with SWAN wave model and have provided the forcings for XBeach, a 2DH hydro-morphodynamic model. Results show that future trends in sea level rise and wave forcing produce non-linear variations of the flooded area and the volume of mobilized sediment resulting from marine storms. In particular, the balance between flooding and sediment transport will shift depending on the relative sea level. Wave induced flooding and long-shore sand transport seem to be diminished in the future, whereas static sea level flooding and cross-shore sediment transport are exacerbated. Therefore, the characterization of tipping points in the coastal response can help to develop robust and adaptive plans to manage climate change impact in sandy wave dominated coasts with a low-lying hinterland and a complex shoreline morphology.

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“…A maior parte dos modelos de predição da erosão por ondas foi desenvolvida para aplicação em águas oceânicas, poucos tratam de erosão em lagos e quase nenhum da erosão de margens de reservatórios. No caso da erosão por ondas em praias e encostas oceânicas, os modelos precisam ser capazes de representar dois diferentes tipos de processos (Rajawat et al, 2015;Bracs et al, 2016;Ramakrishnan et al, 2018): os processos episódicos, que são rápidos, mas causam grandes perdas (tempestades, tsunamis), e os lentos, mas contínuos (ondas, correntes). Destes, os primeiros têm pouca ou nenhuma importância para reservatórios (Nicolodi, 2007).…”

Section: Introductionunclassified

Influência de projetos de reflorestamento de matas ciliares no controle/mitigação da erosão por ondas em reservatórios

Silva

Leite

Costa

et al. 2021

Geol. USP. Sér. Cient.

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A erosão por ondas em reservatórios está entre os processos que mais remodelam suas margens e promovem seu assoreamento. A continuidade destes processos causa inúmeros problemas não só ambientais, mas também econômicos. Infelizmente, poucos são os trabalhos e modelos que tratam do assunto e a maioria deles usa um número restrito de parâmetros em suas análises. Uma das variáveis menos utilizada é a presença/tipo de vegetação, provavelmente pela dificuldade em se estimar seu impacto direto. Para se avaliar a influência da existência de matas ciliares em diferentes estágios sucessionais sobre a erosão por ondas em reservatórios, quatro áreas com diferentes usos e idades de reflorestamento tiveram ventos e ondas monitorados durante um ano e meio, incluindo feições erosivas e recuos de margens medidos, além de solos e sedimentos caracterizados. Os dados obtidos apontaram para um processo complexo, com muitas variáveis correlacionadas. Os resultados mostraram que a área com projeto de revegetação mais antigo (29 anos), cuja mata ciliar já se encontra bem estabelecida, apresenta características de solo e erosão semelhantes à área com vegetação nativa preservada, o que ajudou a preservar suas margens da ação erosiva das ondas. Já a área com projeto de revegetação recente (19 anos), ainda sem uma mata ciliar plenamente desenvolvida, se assemelha às áreas de pastagem, apenas com gramíneas, com intensa perda de material das margens para o reservatório. Esforços devem ser feitos no sentido de modificar legislações e ampliar o número de projetos de reflorestamento no intuito de reduzir os problemas causados pela erosão por ondas em reservatórios e, desta forma, melhorar a qualidade de suas águas e aumentar seu tempo de vida útil.

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Modelling coastal erosion: A case study of Yarada beach near Visakhapatnam, east coast of India

Cited by 28 publications

References 18 publications

Exploring Marine and Aeolian Controls on Coastal Foredune Growth Using a Coupled Numerical Model

Exploring Marine and Aeolian Controls on Coastal Foredune Growth Using a Coupled Numerical Model

Coastal Flooding and Erosion under a Changing Climate: Implications at a Low-Lying Coast (Ebro Delta)

Influência de projetos de reflorestamento de matas ciliares no controle/mitigação da erosão por ondas em reservatórios

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