Novel sediment sampling method provides new insights into vertical grain size variability due to marine and aeolian beach processes

IJzendoorn, Christa van; Hallin, Caroline; Cohn, Nicholas; Reniers, Ad; Vries, Sierd de

doi:10.1002/esp.5518

Cited by 14 publications

(18 citation statements)

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“…Field measurements are often limited to a single location, which means they can show temporal patterns in grain size composition that are related to transport processes occurring upwind (Cohn et al, 2022;Field & Pelletier, 2018). Furthermore, it is difficult to observe the vertical bed composition at a relevant scale with non-invasive observation techniques (van IJzendoorn et al, 2022). Here, modeling has a major advantage as it allows the recording and investigation of the transport chain, including the source area, advective transport through the air, and bed surface grain size throughout the domain.…”

Section: Studying the Role Of Grain Size In The Sediment Transport Chainmentioning

confidence: 99%

“…Besides wind speed peaks, hydrodynamic processes and trampling can also break up and alter armor layers. Hydrodynamic processes can cause erosion, deposition and mixing that directly affect the top layers of the bed surface on a time scale of seasons (e.g., Abuodha, 2003;Prodger et al, 2017), events (e.g., Gallagher et al, 2016) and tides (e.g., van IJzendoorn et al, 2022). Future work could investigate the effect of temporally varying grain sizes due to hydrodynamic processes on the sediment flux by including temporal grain size variations in modeling simulations by making simplified assumptions (e.g.…”

Section: Simulationmentioning

confidence: 99%

“…based on findings by van IJzendoorn et al, 2022) or coupling with a numerical model (Reniers et al, 2013;Srisuwan & Work, 2015). Trampling is also expected to affect the grain size at the bed surface (Moayeri et al, 2023;Reyes-Martínez et al, 2015).…”

Section: Simulationmentioning

confidence: 99%

“…Significant vertical grain size variations at the bed surface have been measured (e.g., van IJzendoorn et al, 2022) and over larger soil depths (e.g., Gallagher et al, 2016;Gunaratna et al, 2019). The measurements of van IJzendoorn et al ( 2022) showed a maximum range of 119 μm in the D 50 of different layers in the top 5 cm of the bed surface.…”

Section: The Implementation Of Spatial Grain Size Variations In Aeoli...mentioning

confidence: 99%

“…Field measurements on beaches have shown considerable spatial variations in grain size in the alongshore (Hallin, et al, 2019a), cross-shore (Bauer, 1991;Çelikoǧlu et al, 2006;Edwards, 2001;Sonu, 1972;Stauble & Cialone, 1997;van der Wal, 2000a;van IJzendoorn et al, 2022) and vertical dimension (van IJzendoorn et al, 2022). These horizontal and vertical grain size variations are expected to have a complex, combined effect on aeolian sediment transport, especially since grain size and sediment transport continuously interact.…”

Section: Introductionmentioning

confidence: 99%

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Modeling multi-fraction coastal aeolian sediment transport with horizontal and vertical grain size variability

IJzendoorn

Hallin

Reniers

et al. 2023

Preprint

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Grain size affects the rates of aeolian sediment transport on beaches. Sediment in coastal environments typically consists of multiple grain size fractions and exhibits spatiotemporal variations. Still, conceptual and numerical aeolian transport models are simplified and often only include a single fraction that is constant over the model domain. It is unclear to what extent this simplification is valid and if the inclusion of multi-fraction transport and spatial grain size variations affects aeolian sediment transport simulations and predictions of coastal dune development. This study applies the numerical aeolian sediment transport model AeoLiS to compare single-fraction to multi-fraction approaches for a range of grain size distributions and spatial grain size scenarios. The results show that on timescales of days to years, single-fraction simulations with the median grain size, D50, often give similar results to multi-fraction simulations provided the wind is able to mobilize all fractions within that time frame. On these timescales, vertical variability in grain size has a limited effect on total transport rates, but it does influence the simulation results on minute timescales. Horizontal grain size variability influences both the total transport rates and the downwind bed grain size composition. The results provide new insights into the influence of beach sediment composition and spatial variability on total transport rates towards the dunes. The findings of this study can guide the implementation of grain size variability in numerical aeolian sediment transport models.

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Section: Studying the Role Of Grain Size In The Sediment Transport Chainmentioning

confidence: 99%

Section: Simulationmentioning

confidence: 99%

Section: Simulationmentioning

confidence: 99%

Section: The Implementation Of Spatial Grain Size Variations In Aeoli...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling multi-fraction coastal aeolian sediment transport with horizontal and vertical grain size variability

IJzendoorn

Hallin

Reniers

et al. 2023

Preprint

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Contemporary research in coastal dunes and aeolian processes

Farrell

Fernandez

Smyth

et al. 2023

Earth Surf Processes Landf

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Coastal dunes are found along the sandy coasts of oceans, seas, and large lakes all around the world. They are dynamic landforms that evolve along complex morphological and biological continua in response to a range on controls linked to climate, sea level, sediment movement, vegetation cover, and land use. By collating research across the full spectrum of processes shaping different types and sizes of dunes and smaller aeolian bedforms, special issues can aid researchers to identify new research directions and methods emerging from the discipline. This editorial summarizes the 25 contributions to the special issue Coastal dunes: links between aeolian processes and landform dynamics. We grouped the contributions into four broad themes: (1) long‐term dune evolution, (2) short‐term aeolian transport, (3) research methods, and (4) coastal dune management. Contributions to the special issue demonstrate that research interest in coastal dunes, and particularly the impacts of human interventions on dunes, continues to grow. It also shows how aeolian research on coastal dunes covers a range of temporal and spatial scales, from ripple dynamics and instantaneous airflow‐transport processes to dune field evolution with rising sea levels and large‐scale dune stage shifts. We highlight potential avenues for future research including vegetation roughness characteristics and their effect on wind flow and sediment transport, the challenges of upscaling short‐ and small‐scale results to larger and longer spatiotemporal scales, and the study of both natural and managed dune landscapes.

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Determination of Grain Sorting in an Accretion Profile Caused by Cross-Shore Sediment Transport

Uzlu

2023

Thalassas

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Novel sediment sampling method provides new insights into vertical grain size variability due to marine and aeolian beach processes

Cited by 14 publications

References 61 publications

Modeling multi-fraction coastal aeolian sediment transport with horizontal and vertical grain size variability

Modeling multi-fraction coastal aeolian sediment transport with horizontal and vertical grain size variability

Contemporary research in coastal dunes and aeolian processes

Determination of Grain Sorting in an Accretion Profile Caused by Cross-Shore Sediment Transport

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