Stability of a Tidal Marsh Under Very High Flow Velocities and Implications for Nature-Based Flood Defense DOI Creative Commons
Ken Schoutens, Marte Stoorvogel, Mario van den Berg

et al.

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: July 28, 2022

Nature-based strategies, such as wave attenuation by tidal marshes, are increasingly proposed a complement to mitigate the risks of failure engineered flood defense structures levees. However, recent analysis historic coastal storms revealed smaller dike breach dimensions if there were natural, high marshes in front dikes. Since naturally only experience weak flow velocities (~0-0.3 ms -1 during normal spring tides), we lack direct observations on stability marsh sediments and vegetation under extreme (order several ) may occur when behind breaches. As first approximation, sediment bed winter-state tested flume. Marsh monoliths excavated from Phragmites australis along Scheldt estuary (Dutch-Belgian border area) installed 10 m long flume test section. Both responses quantified over 6 experimental runs up 1.75 water depth 0.35 for 2 hours. These tests showed that even after cumulative 12 hours exposure velocities, erosion was limited little few millimeters. Manual removal aboveground did not enhance either. Present findings be related strongly consolidated, clay- silt-rich P. root system this experiment. During exposure, stems bent flow, but majority all shoots recovered rapidly had stopped. Although present results blindly extrapolated other types, they do provide strong indication can remain stable conditions, confirm potential well-developed valuable extra natural barrier reducing discharges towards hinterland, following breach. outcomes promote consideration implement part overall rethink strengthening future.

Language: Английский

Sea Level Rise and Implications for Low-Lying Islands, Coasts and Communities DOI Open Access
Michael Oppenheimer, Jochen Hinkel, Alexandre Magnan

et al.

Cambridge University Press eBooks, Journal Year: 2022, Volume and Issue: unknown, P. 321 - 446

Published: Feb. 2, 2022

A summary is not available for this content so a preview has been provided. As you have access to content, full PDF via the 'Save PDF' action button.

Language: Английский

Citations

632
Sea Level Rise and Implications for Low-Lying Islands, Coasts and Communities DOI Open Access
Michael Oppenheimer, Jochen Hinkel, Alexandre Magnan

et al.

Cambridge University Press eBooks, Journal Year: 2022, Volume and Issue: unknown, P. 321 - 446

Published: Feb. 2, 2022

A summary is not available for this content so a preview has been provided. As you have access to content, full PDF via the ‘Save PDF’ action button.

Language: Английский

Citations

244
Surface Water and Groundwater Interactions in Salt Marshes and Their Impact on Plant Ecology and Coastal Biogeochemistry DOI Creative Commons
Pei Xin, Alicia M. Wilson, Chengji Shen

et al.

Reviews of Geophysics, Journal Year: 2022, Volume and Issue: 60(1)

Published: Feb. 2, 2022

Abstract Salt marshes are highly productive intertidal wetlands providing important ecological services for maintaining coastal biodiversity, buffering against oceanic storms, and acting as efficient carbon sinks. However, about half of these have been lost globally due to human activities climate change. Inundated periodically by tidal water, salt subjected strong surface water groundwater interactions, which affect marsh plant growth biogeochemical exchange with water. This paper reviews the state knowledge current approaches quantifying interactions a focus on porewater flow associated soil conditions in connection zonation well carbon, nutrients, greenhouse gas fluxes. Porewater solute transport primarily driven tides moderate regulation rainfall, evapotranspiration sea level rise. Tidal fluctuations play key role through alteration aeration transport, drive export significant fluxes nutrients Despite recent progress, major gaps remain. Previous studies focused flows creek‐perpendicular sections overlooked multi‐scale 3D behaviors. Understanding ecological‐hydrological links under combined influences different forcing factors boundary disturbances is lacking. Variations temperatures flow, exchanges, but extent underlying mechanisms remain unknown. We need fill advance understanding thus enhance our ability protect restore them.

Language: Английский

Citations

141
Marshes and Mangroves as Nature-Based Coastal Storm Buffers DOI Creative Commons
Stijn Temmerman, Erik Horstman, Ken W. Krauss

et al.

Annual Review of Marine Science, Journal Year: 2022, Volume and Issue: 15(1), P. 95 - 118

Published: July 18, 2022

Tidal marshes and mangroves are increasingly valued for nature-based mitigation of coastal storm impacts, such as flooding shoreline erosion hazards, which growing due to global change. As this review highlights, however, hazard by tidal wetlands is limited certain conditions, not all hazards equally reduced. effective in attenuating short-period storm-induced waves, but long-period surges, elevate sea levels up several meters more than a day, attenuated less effectively, or some cases at all, depending on wetland properties, larger-scale landscape geometry. Wetlands often limit erosion, damage vegetation (especially mangrove trees) can be substantial, recovery may take years. Longer-term persistence compromised when combined with other stressors, climate change human disturbances. Due these uncertainties, defense projects need adopt adaptive management strategies.

Language: Английский

Citations

122
Cities and Settlements by the Sea DOI Open Access

O Pörtner,

D Roberts,

M Tignor

et al.

Cambridge University Press eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 2163 - 2194

Published: June 22, 2023

A summary is not available for this content so a preview has been provided. As you have access to content, full PDF via the 'Save PDF' action button.

Language: Английский

Citations

48
Ecosystem services as a resilience descriptor in habitat risk assessment using the InVEST model DOI
Claudia Caro, João Carlos Marques, Pedro P. Cunha

et al.

Ecological Indicators, Journal Year: 2020, Volume and Issue: 115, P. 106426 - 106426

Published: May 7, 2020

Language: Английский

Citations

101
Biogeomorphic modeling to assess the resilience of tidal-marsh restoration to sea level rise and sediment supply DOI Creative Commons
Olivier Gourgue, Jim van Belzen, Christian Schwarz

et al.

Earth Surface Dynamics, Journal Year: 2022, Volume and Issue: 10(3), P. 531 - 553

Published: June 7, 2022

Abstract. There is an increasing demand for the creation and restoration of tidal marshes around world, as they provide highly valued ecosystem services. Yet restored are strongly vulnerable to factors such sea level rise declining sediment supply. How fast develops, how resilient it rise, this can be steered by design key questions that typically challenging assess due complex biogeomorphic feedback processes involved. In paper, we apply a model specific tidal-marsh project planned dike breaching. Our modeling approach integrates hydrodynamics, transport, vegetation dynamics, accounting relevant fine-scale flow–vegetation interactions (less than 1 m2) their impact on landform development at landscape scale (several km2) in long term decades). performance positively evaluated against observations geomorphic adjacent marshes. Model scenarios demonstrate marsh keep pace with realistic rates its resilience more sensitive availability suspended sediments rate rise. We further options steer resilience, affect spatial patterns development. By varying width two breaches, which serve inlets marsh, show larger difference leads higher diversity habitats. This study showcases support management choices optimize towards sustainable goals.

Language: Английский

Citations

51
The grey – green spectrum: A review of coastal protection interventions DOI Creative Commons
Ankita Singhvi, Arjen Luijendijk, Alexander P.E. van Oudenhoven

et al.

Journal of Environmental Management, Journal Year: 2022, Volume and Issue: 311, P. 114824 - 114824

Published: March 4, 2022

In the face of uncertainties around coastal management and climate change, engineering interventions need to be able adapt changing conditions. Nature-based solutions other non-traditional, integrated are gaining traction. However, system-based views not yet embedded into strategies. Moreover, differences in interventions, ranging from hard ('grey') nature-based ('green') infrastructure remain understudied. it is therefore challenging work with grey-green spectrum clarity focus, produce results that can evaluated. The objective this paper was examine whether there a common understanding of: characteristics between grey green infrastructure, where sit on spectrum, resilience versus infrastructure. We conducted an integrative literature review examined 105 protection case studies expanded double-insurance framework ensure approach, looking at both external internal factors resilience. Our showed typically used characterise spectrum. although useful, they do facilitate holistic comparison alternative interventions. additional consideration (response diversity, multifunctionality, modularity adaptive, participatory governance) bridges gap. dikes, reefs, saltmarshes, sand nourishment dunes span wider segment than generally categorised in. Furthermore, resilient for adaptation unlikely exclusively engineered or natural, but tend mix two different spatial scales (micro, meso, macro mega). suggests planners benefit more diverse range options when consider incorporation context each scale. propose should accounted comparatively This brings attention ways which grey-hybrid-green enhances value people.

Language: Английский

Citations

42
Nature-based shoreline protection by tidal marsh plants depends on trade-offs between avoidance and attenuation of hydrodynamic forces DOI
Ken Schoutens,

Maike Heuner,

Elmar Fuchs

et al.

Estuarine Coastal and Shelf Science, Journal Year: 2020, Volume and Issue: 236, P. 106645 - 106645

Published: Feb. 21, 2020

Language: Английский

Citations

56
The evolving landscape of sea-level rise science from 1990 to 2021 DOI Creative Commons
Danial Khojasteh, Milad Haghani, Robert J. Nicholls

et al.

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: July 14, 2023

Abstract As sea-level rise (SLR) accelerates due to climate change, its multidisciplinary field of science has similarly expanded, from 41 articles published in 1990 1475 2021, and nearly 15,000 the Web Science over this 32-year period. Here, big-data bibliometric techniques are adopted systematically analyse large literature set. Four main research clusters (themes) emerge: (I) geological dimensions indicators, (II) impacts, risks, adaptation, (III) physical components (IV) coastal ecosystems habitats, with 16 associated sub-themes. This analysis provides insights into evolution agendas, challenges opportunities for future assessments (e.g. next IPCC reports), growing focus on adaptation. For example, relative importance sub-themes evolves consistently a decline pure towards solution-focused topics SLR risks such as high-end rises, declining ecosystem services, flood hazards, erosion/squeeze.

Language: Английский

Citations

20