Extreme water level fluctuations along the Polish coast

Wiśniewski, B.; Wolski, Tomasz; Kowalewska-Kalkowska, Halina; Cyberski, J.

doi:10.7163/gpol.2009.1.9

Cited by 8 publications

(5 citation statements)

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“…1.5–2.0 m above the average level. The historically noted maxima are 1.96 m above the mean sea-level at Świnoujście and 2.16 m at Kołobrzeg (Wiśniewski et al, 2009; Wolski et al, 2014).…”

Section: Study Areamentioning

confidence: 99%

Holocene relative sea-level changes in the eastern part of Pomeranian Bay and the Szczecin Lagoon, Southern Baltic Sea

Sydor

Uścinowicz

2022

The Holocene

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Sea-level changes of the Baltic Sea have been in the focus since the beginning of Baltic history studies. The main goal of the study is to reconstruct Holocene sea-level changes in the eastern part of Pomeranian Bay and the Szczecin Lagoon. For this purpose, 171 radiocarbon dates were used for the eastern part of Pomeranian Bay and 131 radiocarbon dates for the Szczecin Lagoon. The data allow reconstructing sea-level changes in the last 8500 years in the eastern part of Pomeranian Bay and 7500 years in the Szczecin Lagoon. The sea level 8500 yr b2k was ca. 16 m in Pomeranian Bay, while 7500 yr b2k in the Szczecin Lagoon, it was ca. 8 m below the present sea level. Initially, the fast sea-level rise (up to 9.0 mm/yr) slowed down about 6000 yr b2k to ca. 1.0 mm/yr. In the last 5000 years, the sea level rose at a rate of 0.5 mm/yr in both sites. Analysed data allow distinguishing an extreme event (or events) that disturbed a rather regular course of sea-level rise, which occurred between 7314 and 7022 yr b2k. The history of sea-level changes was similar in the eastern part of Pomeranian Bay and the Szczecin Lagoon despite differences in the geological structure of the pre-Quaternary bedrock and potential various trends in vertical crustal movements. Similarities to some other regions of the southern Baltic and the world ocean allow assuming that sea-level changes in the study area in the last 9000 years in general were eustatic in nature.

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Section: Study Areamentioning

confidence: 99%

Holocene relative sea-level changes in the eastern part of Pomeranian Bay and the Szczecin Lagoon, Southern Baltic Sea

Sydor

Uścinowicz

2022

The Holocene

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“…They were executed using the XBeach package for conditions of an event with the recurrence period of 20 years. Thus, following Boniecka et al (2013), the (peak) wave period was set at T = 8.5 s and the significant wave height at H s = 5.71 m. Next, following Wiśniewski et al (2009) the value of storm surge was set at 1.3 m, roughly corresponding to the return period of 20 years; the sea level rise effect was included by adding extra 0.7 m, jointly producing a storm lea level of 2 m above the current msl. Finally, following British Standard Code of practice for Maritime structures (2000) and Dnv-Os-J101 (2011), the duration of event was set at 3 h, i.e., the effects of storm peak were investigated.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, the highest surge of 216 cm above msl in the entire history of mareographic records on the Polish coast was reported at Kołobrzeg, located between km 330 and 335 Figure 1A in 1874. Statistical analysis of this long series revealed that surges of 150 cm above msl can occur roughly every 10 years (Wiśniewski et al, 2009). As Kołobrzeg is located some 20 km west of Lake Jamno, it demonstrates that the barriers experience the impacts of high surges once per decade on average and this rate is expected to rise under climate change.…”

Section: Site Descriptionmentioning

confidence: 88%

“…In the local context of the three studied barriers past observations revealed high susceptibility to inundations driven by mild but long lasting storm surges; for example, a surge of 0.7 m above msl may almost produce a temporary merger of the lakes Jamno and Bukowo (Majewski et al, 1983). More insight into storm surge characteristics was given in Wiśniewski et al (2009). The highest surge of 159 cm above the msl was reported at Darłowo in 1914-it coincided with the breaching of Lake Bukowo barrier.…”

Section: Site Descriptionmentioning

confidence: 99%

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Resilience of Coastal Lake Barriers in Poland in Light of Geological and Bathymetric Data and Hydrodynamic Simulations

Różyński

Cerkowniak

2022

Front. Mar. Sci.

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The paper presents a study on the insufficient resilience of three coastal lake barriers at the central part of the Polish Baltic Sea coast. Environmental qualities of those lakes belonging to the NATURA2000 network dictate efforts aimed at their conservation through the maintenance of the barriers. The use of recently elaborated high resolution geological surveys demonstrated previously underestimated severe sand scarcity and indicated high threats of enhanced erosion, breaching and overtopping of the barriers. Next, the investigation of alongshore variation of nearshore wave energy dissipation, basing on the available bathymetric records and the concept of ordinary and empirical equilibrium profiles, identified potential erosion hot spots along the barriers. Finally, the XBeach model was applied to simulate the effects of rare, heavy storms with the recurrence period of 20 years with and without climate change induced sea level rise. Overall, the results demonstrated high susceptibility of the barriers to frequent fragmentation and allowed for recommendations of protection measures minimizing interference into the natural landscapes. The novelty of the paper consists in the assessment of aftermaths of extreme events by combining recent advances in coastal geology and climate change effects.

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“…The an nual re sul tant (net) long shore sed i ment trans port on the up per shoreface is ~111,000-145,000 m 3 /year, mov ing from west to east (Szmytkiewicz et al, 2021). Ac cord ing to the near est mareographic sta tions in £eba and W³adys³awowo, the max i mum wa ter level dur ing the mi gra tion of low air pres sure sys tems and as so ci ated storm surges can reach 1.68 m and 1.38 m above the av er age (Wioeniewski et al, 2009). Ac cord ing to the mareographic sta tion lo cated in W³adys³awowo (~10 km west of the study area), the av er age rate of sea level rise between 1951 and 2015 was 2.04 mm/year (Kowalczyk, 2019).…”

Section: Study Areamentioning

confidence: 98%

New insights into coastal processes in the southern Baltic Sea: relevance to modelling and future scenarios

UŚCINOWICZ,

JEGLIŃSKI,

PĄCZEK

et al. 2024

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Un der stand ing the re la tion ships be tween shore line changes and morpho-geo log i cal fea tures of the sea bed and hy dro dynam ics is im por tant for pre dict ing coastal dy nam ics. The south ern Bal tic bar rier coast is dis tin guished by rhyth mic shore line fea tures of dif fer ent scales, form ing an ero sion-ac cu mu la tion sys tem. In this study we ex plore the re la tion ships be tween shoreface-con nected, obliquely ori ented sand ridges, the dis tri bu tion of wave en ergy, and the im pact of waves on shore line changes. A 28.5 km stretch of the Pol ish coast, up to 2 km off shore, was in ves ti gated us ing a multibeam echosounder, a sub-bot tom profiler, side-scan so nar, and sed i ment cor ing. Anal y ses of dig i tal ter rain mod els, ae rial pho to graphs and maps from the late 19th cen tury show that the bound aries be tween ac cre tion and ero sion zones on the coast have shifted eastwards at a rate of ~10-11 m/year. Hy dro dy namic mod el ing shows that de pres sions be tween the ridges are "en ergy windows" through which higher en ergy waves reach the shore. The asym me try of the ridges and their ori en ta tion rel a tive to the pre vail ing wave di rec tion sug gest that they have been mov ing eastwards. Mea sure ments of the 137 Cs con tent in the sed iment cores show that the thick ness of the dy namic layer ex ceeds 1.5-2.0 m. When large-scale sand ridges mi grate, the "energy win dows" also mi grate with them, as does the en tire ero sion-ac cre tion sys tem. In con clu sion, a new type of al ter nat ing shore dy nam ics has been iden ti fied in the dissipative, multibar south ern Bal tic coastal zone. It is highly likely that the av er age shore line re treat mea sured on the scales of a few cen tu ries and tens of kilo metres may be smaller than we sus pect based on ob ser va tions made in re cent de cades.

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Extreme water level fluctuations along the Polish coast

Cited by 8 publications

References 0 publications

Holocene relative sea-level changes in the eastern part of Pomeranian Bay and the Szczecin Lagoon, Southern Baltic Sea

Holocene relative sea-level changes in the eastern part of Pomeranian Bay and the Szczecin Lagoon, Southern Baltic Sea

Resilience of Coastal Lake Barriers in Poland in Light of Geological and Bathymetric Data and Hydrodynamic Simulations

New insights into coastal processes in the southern Baltic Sea: relevance to modelling and future scenarios

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