Suspended particulate matter for sediment accumulation on inundated anthropogenic marshland in the southern North Sea – Potential, thresholds and limitations

Hache, Ingo; Karius, Volker; Eynatten, Hilmar von

doi:10.1016/j.csr.2020.104214

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Human decision-making impacts erosion at the coast and thus has the potential to impact marsh sediment supply. For example, in the Wadden Sea, Hache et al (2020Hache et al ( , 2021 observed that less than half the available suspended sediment mobilized during storms was able to accumulate on marshes behind artificial revetments and breakwaters. As of 2013, nearly 27% of the Massachusetts coastline was armored by some form of coastal protection (Fontenault et al, 2013).…”

Section: Implications Of Coastal Armoringmentioning

confidence: 99%

Sources, Mechanisms, and Timescales of Sediment Delivery to a New England Salt Marsh

et al. 2022

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Tidal salt marshes are critical protectors of the coast; they buffer against erosion and flooding (Möller et al., 2014), sequester carbon (Chmura et al., 2003), provide habitat to juvenile species and migratory birds (Boesch & Turner, 1984;Hughes, 2004), and filter pollutants and excess nutrients (Sousa et al., 2010). Coastal wetland maintenance involves complex biophysical feedbacks between clastic (i.e., inorganic) sediment supply, nutrients, plant growth, and flooding (Deegan et al., 2012;Kirwan & Megonigal, 2013). Deposition of clastic sediment in the form of clays, silts, and sands allows marshes to accrete faster than would be possible via in-situ organic production alone; thus, the availability and delivery of clastic sediment is a key factor in determining salt marsh resilience to erosion and future sea level rise (e.g.,

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Section: Implications Of Coastal Armoringmentioning

confidence: 99%

Sources, Mechanisms, and Timescales of Sediment Delivery to a New England Salt Marsh

et al. 2022

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“…Removing sediment from estuarine systems, for example, via dredging, presents an added stressor (Chant et al., 2021; Ganju, 2019) that compounds the effects of accelerating SLR and eutrophication (Deegan et al., 2012; Turner et al., 2009; Wigand et al., 2014). Similarly, engineering of the coastline to halt erosion may have the unintended consequence of reducing sources of sediment important to marsh health (Baranes et al., 2022; Hache et al., 2020; Peteet et al., 2018). In coastal regions that lack large supplies of suspended fluvial sediment, such as the coastlines of the northeast US, Australia, and West Africa (Milliman & Farnsworth, 2013), managers must consider alternate supplies of sediment to replace the potentially reduced sediment flux from armored coastlines and dredging projects.…”

Section: Discussionmentioning

confidence: 99%

Salt Marsh Response to Inlet Switch‐Induced Increases in Tidal Inundation

et al. 2022

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Salt marshes aggrade in quasi-equilibrium with sea level rise (SLR) via the accumulation of organic matter and mineral sediment, thereby maintaining marsh platform elevation within the tidal frame (e.g., Allen, 2000;Cahoon et al., 2019). External perturbations, such as an acceleration of relative SLR, can be compensated for by increased sediment delivery to the marsh platform. Increased inundation depth tends to augment sediment delivery as the associated longer flood duration increases time to trap suspended sediment (Day et al., 1999;Reed, 1990;Temmerman et al., 2003). In some cases, increased suspended sediment concentrations associated with land clearance has allowed marshes to recover from rapid SLR (Peck et al., 2020;Watson, 2004). In addition to increased mineral sediment delivery, there is some evidence that bioproductivity of low marsh grasses may increase with moderate increases in inundation, with subsequent vegetation drowning at higher levels of inundation (Morris et al., 2002;Voss et al., 2013). However, many studies have found declining biomass with increased

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Storm surge induced sediment accumulation on marsh islands in the southeastern North Sea: Implications for coastal protection

Hache

Karius

Eynatten

2021

Estuarine, Coastal and Shelf Science

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Suspended particulate matter for sediment accumulation on inundated anthropogenic marshland in the southern North Sea – Potential, thresholds and limitations

Cited by 4 publications

References 26 publications

Sources, Mechanisms, and Timescales of Sediment Delivery to a New England Salt Marsh

Sources, Mechanisms, and Timescales of Sediment Delivery to a New England Salt Marsh

Salt Marsh Response to Inlet Switch‐Induced Increases in Tidal Inundation

Storm surge induced sediment accumulation on marsh islands in the southeastern North Sea: Implications for coastal protection

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