Evaluation of 10 cross-shore sediment transport/ morphological models

Schoonees, J.S.; Theron, A.K.

doi:10.1016/0378-3839(94)00040-5

Cited by 54 publications

(21 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thornton [54]; Gallagher et al [55]) have been able to predict observed morphological change with a reasonable degree of accuracy. However, under calm conditions, these same models perform poorly and generally cannot predict onshore sediment movement [55][56][57]. Exploring wave characteristics and the sediment transporting relationship is a basic approach to improve the accuracy for modeling.…”

Section: Discussionmentioning

confidence: 99%

Relationship between high-frequency sediment-level oscillations in the swash zone and inner surf zone wave characteristics under calm wave conditions

Liu

2016

Open Geosciences

View full text Add to dashboard Cite

Swash zone topography rapidly responds to the surf zone waves. Understanding how sandy beaches respond to wave action is critical for beach erosion research, and plays a critical role in the design and maintenance of shore protection structures. The main objectives of this study were to detect the relationship between high-frequency beachface oscillations and surf zone wave characteristics under plunging breakers by using Canonical Correlation Analysis (CCA). The study site is located in Houjiangwan Bay, eastern Guangdong. Topography data were sampled at 6 min intervals. The wave characteristic parameters were calculated by spectrum method. During the eld work, the beach showed a re ective state and plunging breakers controlled the surf zone. The beach cusp topography was destructed gradually. The analysis provides 4 canonical correlation processes between the beachface variations and surf zone waves, which explained 95.28% of the overall variation in the data. The result shows wave steepness, the irregularity factor and spectral broadness factor had strong impacts on the topography. The wave steepness was the most important factor for beach pro le variations. The results of the present study indicate that data-driven statistical analysis, such as CCA, is useful for analyzing pro le response to waves if there is strong correlation between the two variables (beach pro les and wave).

show abstract

Section: Discussionmentioning

confidence: 99%

Relationship between high-frequency sediment-level oscillations in the swash zone and inner surf zone wave characteristics under calm wave conditions

Liu

2016

Open Geosciences

View full text Add to dashboard Cite

show abstract

“…Each homogenous littoral cell was divided into two parts in order to It was evaluated, by comparing few methods [72], that the cross-shore sediment transport Q CR was heading offshore and approximately equal to 1 m 3 /km/year, except where the cell boundary element is a river mouth, where an additional contribution is assessed to simulate the sediment plume losses.…”

Section: Description Of the Area And Assessment Of Sediment Budgetmentioning

confidence: 99%

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Ruol

Martinelli

Favaretto

2018

Water

View full text Add to dashboard Cite

This paper discusses the key aspects of the recent Coastal Plan of the Veneto Region (IT). Its aim is to propose a single mitigation strategy for coastal erosion that is valid for the whole Veneto Region, and possibly elsewhere, as well as a method to assign a priority level to any action. The suggested mitigation action against erosion depends on urbanization level, beach width, as well as cross-shore and long-shore sediment transport. The criterion used to give a priority level to mitigation actions is based on a vulnerability index that takes into account erosive tendency, existing coastal flooding hazards, coast value, environmental relevance, tourist pressure, urbanization level, the presence of production activities, and cultural heritage. A sample case featuring the littoral of Rosolina is also provided and includes a site description, the sediment budget, critical issues and possible mitigation measures.

show abstract

“…For different study areas, three types of models have been classified (Roelvink and Reniers, 2012): coastal profile models, where the focus is on the cross-shore processed and the long-shore variability is neglected (Roelvink and Brøker, 1993;Schoonees and Theron, 1995), coastline models, where the cross-shore profiles are assumed to retain their shape even when the coast advances or retreats (Szmytkiewicz et al, 2000) and coastal area models, where variations in both horizontal dimensions are resolved (Nicholson et al, 1997).…”

Section: Coastal Area Models: 2dh and 3d Modelsmentioning

confidence: 99%

Modelling and Analysis of Fine Sediment Transport in Wave-Current Bottom Boundary Layer

Zuo¹

2018

View full text Add to dashboard Cite

Although all care is taken to ensure integrity and the quality of this publication and the information herein, no responsibility is assumed by the publishers, the author nor IHE Delft for any damage to the property or persons as a result of operation or use of this publication and/or the information contained herein. A pdf version of this work will be made available as Open Access via http://repository.tudelft.nl/ihe. This version is licensed under the Creative Commons To my family AbstractThe evolution and utilization of estuarine and coastal regions are greatly restricted by sediment problems. Inspired by the Caofeidian sea area in Bohai Bay, China, this study aims to better understand silty sediment transport under combined action of waves and currents, especially in the wave-current bottom boundary layer (BBL), and to improve our modelling approaches in predicting estuarine and coastal sediment transport.Field observations were carried out in northwestern Caofeidian sea area of Bohai Bay and field data were collected on several other silt-dominated coasts. Analysis shows that silt-dominated sediments are sensitive to flow dynamics: the suspended sediment concentrations (SSCs) increase rapidly under strong flow dynamics (i.e., waves or strong tidal currents which can stir up sediments), and high concentrations cause heavy sudden back siltation in navigation channels. In the following, details of silty sediment transport are studied, focusing on the BBL and high concentration layer (HCL).From laboratory experiments and theoretical analysis, an expression for sediment incipient motion is proposed for silt-sand sediment under combined wave and current conditions. The Shields number was revised by adding the cohesive force and additional static pressure, leading to an extended Shields curve.To study the HCL, a process based 1DV model was developed for flow-sediment dynamics near the bed in combined wave-current conditions. Based on the physical processes, special approaches for sediment movement were introduced, including approaches for different bed forms (rippled bed and 'flat-bed'), hindered settling, stratification effects, mobile bed effects, reference concentration and critical shear stress. The HCL was simulated and sensitivity analysis was carried out by the 1DV model on factors that impact the sediment concentration in the HCL. The results show that the HCL is affected by both flow dynamics and bed forms; the thickness of the HCL is about twice the height of the wave boundary layer; bed forms determine the shape of the concentration profile near the bottom, and flow dynamics determine the magnitude. For finer sediment, stratification effects and mobile bed effects impact the sediment concentration greatly.Finally, based on the 1DV model, the formulations of the mean sediment concentration profile of silty sediments were studied. By solving the time-averaged diffusion equation for SSC and considering the effects of bed forms, stratification and hindered settling, expressions for time-averaged SSC profile...

show abstract

Evaluation of 10 cross-shore sediment transport/ morphological models

Cited by 54 publications

References 25 publications

Relationship between high-frequency sediment-level oscillations in the swash zone and inner surf zone wave characteristics under calm wave conditions

Relationship between high-frequency sediment-level oscillations in the swash zone and inner surf zone wave characteristics under calm wave conditions

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Modelling and Analysis of Fine Sediment Transport in Wave-Current Bottom Boundary Layer

Contact Info

Product

Resources

About