Crossing the Boundaries: How Key Advancements in Understanding of Headland Sediment Bypassing Improves Definition of Littoral Cells

Review Geochemistry & Geophysics

Modeling the Morphodynamics of Coastal Responses to Extreme Events: What Shape Are We In?

Christopher R. Sherwood et al.

Summary: This review focuses on recent advancements in process-based numerical models of extreme storms' impact on sandy coasts. These models, driven by larger-scale meteorology and hydrodynamics models, simulate various processes across the Sallenger storm-impact scale.

ANNUAL REVIEW OF MARINE SCIENCE (2022)

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Article Environmental Sciences

Headland bypassing timescales: Processes and driving forces

Ana Paula da Silva et al.

Summary: This paper investigates the short-term and long-term variability of natural headland bypassing, focusing on the influence of wave conditions, climate drivers, and anthropogenic interventions. The study reveals that the headland bypassing process around Fingal Head is governed by two distinct processes, with their dominance controlled by wave and sediment availability. Results indicate that the bypassing cycles occur in different timescales, influenced by large-scale climate drivers such as El Nino-Southern Oscillation, Pacific Decadal Oscillation, and Interdecadal Pacific Oscillation.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Engineering, Civil

An XBeach derived parametric expression for headland bypassing

R. Jak McCarroll et al.

Summary: Accurate knowledge of the sediment budget of a coastal cell is essential for coastal management and predicting long-term changes. Wave-forced bypassing of isolated headlands can be estimated using a parameterisation method based on wave conditions, shoreface slope, sediment size, headland toe-depth, and cross-shore extent. The formulation accurately replicates bypass rates, generally to within a factor of two, and can provide a first-pass estimate for a wide range of headland types.

COASTAL ENGINEERING (2021)

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Article Oceanography

Wave, Tide and Topographical Controls on Headland Sand Bypassing

E. King et al.

Summary: This study focuses on the factors influencing headland bypassing on embayed coastlines and demonstrates predictability under wave-driven conditions. The bypassing rates depend mainly on headland cross-shore length, headland toe depth, and sediment coverage.

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS (2021)

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Article Geography, Physical

Quantifying thresholds of barrier geomorphic change in a cross-shore sediment-partitioning model

Daniel J. Ciarletta et al.

Summary: Barrier coasts, including barrier islands and beach-ridge plains, exhibit diverse morphologies over multi-decadal scales, with modern sea-level rise and sediment availability playing critical roles in shaping their evolution. This study explores the quantitative thresholds controlling barrier system behavior, revealing that subtle changes in sediment fluxes could significantly impact barrier morphology. The research suggests that the balance between relative sea-level rise and sediment flux largely determines the transitions between different barrier states, highlighting the importance of understanding these dynamics in the face of rising sea levels.

EARTH SURFACE DYNAMICS (2021)

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Article Geography, Physical