Storm Surges Versus Shore Erosion: 21 Years (2000–2020) of Observations on the Świna Gate Sandbar (Southern Baltic Coast)

Quaestiones Geographicae

article

Tomasz Arkadiusz Łabuz¹ 

[1] Institute of Marine and Environmental Sciences, University of Szczecin

关键词: storm surge;    sea level;    run-up;    dune erosion;    beach erosion;    sand volume changes;    Baltic Sea;   

DOI  :  10.2478/quageo-2022-0023

学科分类：医学（综合）

来源: Walter de Gruyter GmbH

【 摘 要 】

Based on observations spanning 21 years (2000–2020), the article studies the effects of storm surges on the shore of the Świna Gate Sandbar in the southern part of the Pomeranian Bay (southern Baltic Sea). Impacts of selected maximum storm surges in each year were assessed with respect to morphological data collected on the beach and the foredune. The data included parameters of beach-dune erosion as measured along a beach transect before and after each surge. Differences and trends in the shore erosion were related to the sea level (SL), duration of a storm surge [highest storm sea level (HSL) > 1 m], wind-wave sector and wave run-up. The relationships were explored using a simple correlation analysis. The most serious erosion was observed during the heaviest surges [HSL > 1.3 m above the mean sea level (AMSL)], with a wave run-up higher than 3.2 m AMSL. Such surges occurred at about 2-year intervals. The average SL during a surge was 1.2 m AMSL, with a run-up of 2.6 m AMSL. The beach and the lower part of the shore, below that level, were eroded each year.

【 授权许可】

CC BY