Modeling the effects of aerial temperature and exposure period on intertidal mudflat profiles

Nguyen, Hieu M.; Bryan, Karin R.; Zhou, Zeng; Pilditch, Conrad A.

doi:10.1016/j.csr.2022.104802

Cited by 2 publications

(4 citation statements)

References 19 publications

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“…The complexity of determining bed stability is illustrated by a comparison between imposed

τ_{cr}

and measured soil shear strength (Figure 4b), which only could partly be explained with a linear fit ( p = 0.06, r 2 = 0.37). This complexity stems from the spatial and temporal variability in surface sediment stability (Nguyen et al, 2022). Moreover, soil shear strength measurements in the field are not only taken at a specific point in time, they are also highly variable depending on the exact location in relation to the presence of e.g., trees, bed runnels and ponding water.…”

Section: Discussionmentioning

confidence: 99%

“…This approach has been adopted in recent numerical modelling studies in vegetated intertidal environments (e.g., Willemsen, Smits, et al, 2022;Xie et al, 2020Xie et al, , 2022. The present study included variability in the sediment bed stability of the intertidal flat due to aerial exposure (e.g., drying and/or biofilm presence) following Nguyen et al (2020), who found that longer periods of aerial exposure lead to sustained increases in sediment bed stability (Fagherazzi et al, 2017;Nguyen et al, 2022). The present study also included the effects of mangrove trees on tides, waves and sediment dynamics.…”

Section: Model Setupmentioning

confidence: 99%

“…The model accurately simulates the long-term profile development with realistic accretion rates. However, temporal variability due to variations in e.g., temperature, radiation, rainfall, biofilm presence or mangrove root development are not considered (Harris et al, 2016;Lelieveld et al, 2003;Nguyen et al, 2020;Nguyen et al, 2022;Pilditch et al, 2008;Stokes & Harris, 2015;Swales et al, 2019), nor is the time required for the stabilisation of freshly accreted sediment (Colosimo et al, 2023). The latter may yield an overestimated bed stability, particularly in the area where sediment accretion is largest (station G).…”

Section: Model Performance and Limitations For Intertidal Flat Morpho...mentioning

confidence: 99%

“…The complexity of determining bed stability is illustrated by a comparison between imposed τ cr and measured soil shear strength (Figure 4b), which only could partly be explained with a linear fit (p = 0.06, r 2 = 0.37). This complexity stems from the spatial and temporal variability in surface sediment stability (Nguyen et al, 2022).…”

Section: Model Performance and Limitations For Intertidal Flat Morpho...mentioning

confidence: 99%

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Mangrove forest drag and bed stabilisation effects on intertidal flat morphology

Gijsman,

Horstman,

Swales

et al. 2023

Earth Surf Processes Landf

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Mangrove trees influence their physical environment by exerting drag on tidal flows and waves while also stabilising the sediment bed of intertidal flats. These processes influence sediment accretion, the mangrove habitat and their resilience to sea level rise. However, little is known about the magnitude and spatial extent of the effects of mangrove forests on sediment transport and the morphology of the intertidal flat. We use manipulated simulations with an extended process‐based numerical model, to study the influence of mangrove forests on intertidal flat morphology on a yearly timescale. The model includes the influence of mangrove trees on tidal flows, waves and sediment dynamics. The model is calibrated and validated with a comprehensive set of measurement data including hydrodynamics, sediment transport and morphological processes from an expanding mangrove forest in the sediment‐rich Firth of Thames estuary in Aotearoa New Zealand.Sediment accretion on the upper intertidal flat is predominantly influenced by the characteristic morphology of the established mangrove forest, with increased bed stability at higher mudflat elevations related to prolonged aerial exposure and drying of the bed. Our results show that, in comparison to the situation without mangroves, sediment accretion increases in the most seaward fringe area of the forest. The unvegetated intertidal flat fronting the mangrove forest captures less sediment compared to the situation without mangroves. The mangrove forest drag triggers the development of a steeper, convex‐up‐shaped, upper intertidal flat profile, especially during periods with higher water levels and waves. These effects are expected to influence the development and storm‐recovery of natural and restored mangrove forests and may contribute to the resilience and persistence of mangrove‐vegetated intertidal flats for coastal flood risk reduction.

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“…The complexity of determining bed stability is illustrated by a comparison between imposed

τ_{cr}

Section: Discussionmentioning

confidence: 99%

Section: Model Setupmentioning

confidence: 99%

Section: Model Performance and Limitations For Intertidal Flat Morpho...mentioning

confidence: 99%

Section: Model Performance and Limitations For Intertidal Flat Morpho...mentioning

confidence: 99%

See 2 more Smart Citations

Mangrove forest drag and bed stabilisation effects on intertidal flat morphology

Gijsman,

Horstman,

Swales

et al. 2023

Earth Surf Processes Landf

View full text Add to dashboard Cite

show abstract

Winds of opportunity: The effects of wind on intertidal flat accretion

et al. 2023

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Modeling the effects of aerial temperature and exposure period on intertidal mudflat profiles

Cited by 2 publications

References 19 publications

Mangrove forest drag and bed stabilisation effects on intertidal flat morphology

Mangrove forest drag and bed stabilisation effects on intertidal flat morphology

Winds of opportunity: The effects of wind on intertidal flat accretion

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