Numerical modelling of hydrodynamic and morphodynamic response of a meso-tidal estuary inlet to the impacts of global climate variabilities

Yin, Yunzhu; Karunarathna, Harshinie; Reeve, Dominic E.

doi:10.1016/j.margeo.2018.11.005

Cited by 21 publications

(17 citation statements)

References 28 publications

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“…numerical model. This model has been validated by Yin et al [27], which was successfully applied previously the impacts of sea level rise on the same estuary.…”

Section: The Study Site and Its Environmentmentioning

confidence: 99%

“…The model includes coupled flow and wave modules and, sediment transport and bed updating modules for morphodynamic prediction. Nested computational domains were used to achieve computational efficiency and required accuracy [27]. Within the smallest domain (Domain C in Figure 9), a domain decomposition process is implemented to achieve a higher resolution to resolve the morphodynamic changes within the estuary.…”

Section: Model Set Upmentioning

confidence: 99%

“…In this study, we use the Deben Estuary inlet, located in the east coast of the UK, as our study site to investigate the impacts of the combined effect of future sea levels and future extreme events on estuary morphodynamics, using a process-based numerical model. This model has been validated by Yin et al [27], which was successfully applied previously the impacts of sea level rise on the same estuary.…”

Section: Introductionmentioning

confidence: 99%

“…Passeri et al [26], using a numerical modelling study, concluded that hydrodynamics and hence morphodynamics of the Mississippi-Alabama barrier island were influenced by SLR. Recently, Yin et al [27] investigated the effects of SLR on the meso-tidal, ebb-dominated Deben Estuary in the UK using a numerical model and concluded that the Deben Estuary inlet would become more dynamic as a result of SLR. Duong et al [28,29] computationally modelled sea level rise and wave impacts on small tidal inlets located in a micro-tidal environment.…”

Section: Introductionmentioning

confidence: 99%

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A Computational Investigation of Storm Impacts on Estuary Morphodynamics

Yin

Karunarathna

Reeve

2019

JMSE

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Global climate change drives sea level rise and changes to extreme weather events, which can affect morphodynamics of coastal and estuary systems around the world. In this paper, a 2D process-based numerical model is used to investigate the combined effects of future mean sea level and storm climate variabilities on morphological change of an estuary. Morphodynamically complex, meso-tidal Deben Estuary, located in the Suffolk at the east coast of the UK is selected as our case study site. This estuary has experienced very dynamic behaviors in history thus it might be sensitive to the future climate change. A statistical analysis of future storms around this area, derived from a global wave model, has shown a slight increase of storm wave heights and storm occurrences around the estuary in future as a result of global climate variations under medium emission scenario. By using a process-based model and by combining the forecast ‘end-of-century’ mean sea level with statistically derived storm conditions using projected storms over a time slice between 2075–2099, we determined hydrodynamic forcing for future morphodynamic modelling scenarios. It is found that the effect of increased sea level combined with future storms can significantly alter the current prevailing morphodynamic regime of the Deben Estuary thus driving it into a less stable system. It is also found that storm waves can be very significant to morphodynamic evolution of this tide-dominated estuary.

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“…numerical model. This model has been validated by Yin et al [27], which was successfully applied previously the impacts of sea level rise on the same estuary.…”

Section: The Study Site and Its Environmentmentioning

confidence: 99%

Section: Model Set Upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Computational Investigation of Storm Impacts on Estuary Morphodynamics

Yin

Karunarathna

Reeve

2019

JMSE

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“…Among the numerical models that have been used to simulate the hydrodynamics of coastal systems (e.g., MARS3D [5]; MIKE3 [6]; SELFE [7]; SHYFEM [8]; TELEMAC [9]; MIKE 21/3 [10]; CSIRO [11]; Delft3D [12]), MOHID Water (Portuguese acronym of MOdelação HIDrodinâmica) is one of the most widely used. The MOHID Water model was developed by MARETEC (Marine and Environmental Technology Research Center).…”

Section: Introductionmentioning

confidence: 99%

Validation of the 3D-MOHID Hydrodynamic Model for the Tagus Coastal Area

Pablo

Sobrinho

García

et al. 2019

Water

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The hydrodynamics of the TagusROFI (Regions of Freshwater Influence) is affected by the coastal upwelling, the estuarine tidal flow, the thermohaline circulation that is modulated by the Tagus freshwater discharge, and by its complex bathymetry. The use of numerical models is the best way to explain the processes that characterize this region. These models are also crucial to answer important scientific and management questions. Nevertheless, the robustness of the products derived from models depend on their accuracy and therefore models must be validated to determine the uncertainty associated. Time and space variability of the driving forces and of bathymetry enhance flow complexity increasing validation difficulties, requiring continuous high-resolution data to describe flow and thermohaline horizontal and vertical variabilities. In the present work, to increase the precision and accuracy of the coastal processes simulations, the sub-systems coastal area and the Tagus estuary were integrated into a single domain, which considers higher resolution grids in both horizontal and vertical directions. The three-dimensiosal (3D)-MOHID Water model was validated for the TagusROFI by comparing statistically modelling results with in situ and satellite L4 data. Validation with a conductivity, temperature, and depth probe (CTD), an acoustic doppler current profiler (ADCP) and satellite data was performed for the first time. Validation against tidal gauges showed that the model is able to simulate tidal propagation inside the estuary with accuracy. A very good agreement between CTD data and surface sea water temperature (SST) and salinity simulations was observed. The validation of current direction and velocity from ADCP data also indicated a high model accuracy for these variables. Comparisons between model and satellite for SST also showed that the model produces realistic SSTs and upwelling events. Overall results showed that MOHID setup and parametrisations are well implemented for the TagusROFI domain. These results are even more important when a 3D model is used in simulations due to its complexity once it considers both horizontal and vertical discretization allowing a better representation of the heat and salinity fluxes in the water column. Moreover, the results achieved indicates that 3D-MOHID is robust enough to run in operational mode, including its forecast ability, fundamental to be used as a management tool.

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