Swash bar stability on a high-energy mesotidal beach

IF 3.1 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Geomorphology Pub Date : 2025-04-05 DOI:10.1016/j.geomorph.2025.109751

J.E. Cueto-Fonseca , G. Herbst , C. Winter

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引用次数: 0

Abstract

Swash bars are intertidal bar systems characterized by a single, small, low-amplitude bar and trough, often displaying a rhythmic pattern along the shore with troughs converging into shore-normal rip channels. In this study, we assess the stability of swash bars on Spiekeroog North Beach—a high-energy mesotidal beach in the German North Sea—using high-frequency fixed-camera imagery and wave and water level records collected over >100 days. Swash bar size fluctuations and migration rates were calculated and related to water level and wave heights. Three distinct states can be defined: dynamic equilibrium (migration ≤15 m/day, associated with fair-weather conditions), active migration (migration >15 m/day, occurring under moderate to high energy levels), and no-bar states, typically following high-energy events such as storms. Additionally, bar creation and destruction patterns were analysed in relation to local hydrodynamic conditions. These findings were synthesized into a stability diagram, illustrating the likely behaviour of swash bars under specific wave and water level conditions.

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来源期刊

Geomorphology 地学-地球科学综合

CiteScore

8.00

自引率

10.30%

发文量

309

审稿时长

3.4 months

期刊介绍： Our journal''s scope includes geomorphic themes of: tectonics and regional structure; glacial processes and landforms; fluvial sequences, Quaternary environmental change and dating; fluvial processes and landforms; mass movement, slopes and periglacial processes; hillslopes and soil erosion; weathering, karst and soils; aeolian processes and landforms, coastal dunes and arid environments; coastal and marine processes, estuaries and lakes; modelling, theoretical and quantitative geomorphology; DEM, GIS and remote sensing methods and applications; hazards, applied and planetary geomorphology; and volcanics.