Overview : International Guidelines on Natural and Nature-Based Features for Flood Risk Management

Bridges, Todd S.; King, James J.; Simm, Jonathan; Beck, M.B.; Collins, Georganna.; Lodder, Quirjin; Mohan, Ram K.

doi:10.21079/11681/41945

Cited by 3 publications

(1 citation statement)

References 16 publications

(16 reference statements)

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“…Salt marshes are natural and nature‐based features (NNBFs) that can provide flood defenses to reduce the impact of sea‐level rise, storms, and hurricanes on coastal communities (Bridges et al, 2021; Moller et al, 2014; Zhu et al, 2020). They additionally provide a unique habitat for many floral and faunal species, filter nutrients and sediments from the water column, enhance carbon sequestration over decennial and millennial timescales, and increase fishery production in the areas that surround them (Cheong et al, 2013; Zedler & Kercher, 2005).…”

Section: Introductionmentioning

confidence: 99%

Near‐continuous monitoring of a coastal salt marsh margin: Implications for predicting marsh edge erosion

Cadigan

Jafari

Wang

et al. 2023

Earth Surf Processes Landf

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Mechanisms that control marsh edge erosion include wind‐generated waves, vegetation productivity, land use and land change, and geotechnical properties of sediments. However, existing models for predicting marsh edge evolution focus primarily on edge retreat rates as a function of wave energy while accounting for other controlling factors as empirical constants. This simplification arises from a lack of high‐frequency monitoring of marsh evolutions. In particular, marsh erosion is timescale dependent, and conducting field observations on short temporal and spatial scales could elucidate the progression of erosion, which may improve marsh erosion predictive models. This study developed and validated a near‐continuous camera and erosion pin monitoring system to document marsh edge erosion at a high frequency (i.e., daily) in Terrebonne Bay, Louisiana. This was supplemented with daily wave power to explore the relationships between daily erosion and wave power. Long‐term average erosion rates derived from satellite and aerial imagery from 1989 through 2019 compare similarly to rates derived from longer‐term site visits (i.e., monthly) at approximately 2.2 m/yr. High‐magnitude erosion events (>20 cm/day) are driven by a buildup in wave energy over a 7‐day time period coupled with a strong 1‐day wave event, indicating a gradual reduction in marsh edge resistance with continued wave attack. Long‐term erosion monitoring methods, including monthly field visits, provide results that align well with previously reported relationships between wave power and erosion. High‐frequency measurements, however, illustrate that the previously published trends smooth over the large‐magnitude short‐term erosion events, potentially obscuring the physical processes of marsh edge erosion. For example, satellite and aerial imagery provide a long period of record, but they may underestimate the average annual erosion rate in the region, the effect of which may become exasperated over the varying temporal scales considered in coastal planning efforts across the USA and worldwide.

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Section: Introductionmentioning

confidence: 99%

Near‐continuous monitoring of a coastal salt marsh margin: Implications for predicting marsh edge erosion

Cadigan

Jafari

Wang

et al. 2023

Earth Surf Processes Landf

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Legal and Management Classifications for Estuaries and Coasts

Stojanovic,

Boyes

2024

Treatise on Estuarine and Coastal Science (Second Edition)

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Resistance, resilience, and recovery of salt marshes in the Florida Panhandle following Hurricane Michael

Castagno

Tomiczek

Shepard

et al. 2021

Sci Rep

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Characterizing the fragility, resistance, and resilience of marshes is critical for understanding their role in reducing storm damages and for helping to manage the recovery of these natural defenses. This study uses high-resolution aerial imagery to quantify the impacts of Hurricane Michael, a category 5 hurricane, on coastal salt marshes in the Florida Panhandle, USA. Marsh damage was classified into several categories, including deposition of sediment or wrack, fallen trees, vegetation loss, and conversion to open water. The marshes were highly resistant to storm damages even under extreme conditions; only 2% of the 173,259 km2 of marshes in the study area were damaged—a failure rate much lower than that of artificial defenses. Marshes may be more resistant than resilient to storm impacts; damaged marshes were slow to recover, and only 16% of damaged marshes had recovered 6 months after landfall. Marsh management mattered for resistance and resilience; marshes on publicly-managed lands were less likely to be damaged and more likely to recover quickly from storm impacts than marshes on private land, emphasizing the need to incentivize marsh management on private lands. These results directly inform policy and practice for hazard mitigation, disaster recovery, adaptation, and conservation, particularly given the potential for more intense hurricane landfalls as the climate changes.

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Overview : International Guidelines on Natural and Nature-Based Features for Flood Risk Management

Cited by 3 publications

References 16 publications

Near‐continuous monitoring of a coastal salt marsh margin: Implications for predicting marsh edge erosion

Near‐continuous monitoring of a coastal salt marsh margin: Implications for predicting marsh edge erosion

Legal and Management Classifications for Estuaries and Coasts

Resistance, resilience, and recovery of salt marshes in the Florida Panhandle following Hurricane Michael

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