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Contemporary Dynamics of the Sea Shore of Kaliningrad Oblast

Karmanov K., Burnashov E., Chubarenko B.

Archives of Hydro-Engineering and Environmental Mechanics

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2018

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Vol. 65, nr 2

143--159

EN

The article presents estimations of coastline retreat and advance in Kaliningrad Oblast at 85 monitoring points for a ten-year period of 2007–2017, based on monitoring data supplemented with satellite image analysis. The mean annual rate of coastline retreat and advance was estimated in general for each of the four major morpholithodynamic segments of the coastline: the Vistula (􀀀0:2 m/year) and Curonian (􀀀0:4 m/year) spits, as well as the western (􀀀0:5 m/year) and northern (􀀀0:2 m/year) shores of the Sambia Peninsula. The analysis of the shore protection measures implemented in Kaliningrad Oblast from 2007 to 2017 showed that the length of protected shore segments increased by 30% to 14.5 km, which is 10% of the total coastline. The obtained scheme of long-term mean annual rates of coastline retreat and advance clearly demonstrates an uneven distribution of eroded segments along the shores of Kaliningrad Oblast, however the sea shore of Kaliningrad Oblast is mainly susceptible to erosion (44%). Accumulative segments of the shore make up only 17% of the total coastline, and the remaining 39% of the shore is relatively stable. The results obtained demonstrate that the long-term mean annual rate of coastline retreat has decreased to 􀀀0:3 m/year from 􀀀1 m/year in the earlier period of 2000–2010. The general condition of the entire coastline of Kaliningrad Oblast can therefore be described as relatively sustainable]. The changes are related to several factors, such as an increase in the length of protected shore segments, the resumption of sand pulp dumping in the beach area by the Amber Mining Plant, and an increase in the amount of analytical data from an expanded local monitoring network.

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Metody badań terenowych w analizie zmian ukształtowania akumulacyjnych odcinków wydm nadmorskich polskiego wybrzeża

Łabuz T. A.

Landform Analysis

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2015

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Vol. 28

45--60

PL

W pracy przedstawiono metody badań zastosowanych do analizy zmian rzeźby wydm nadmorskich na akumulacyjnych odcinków polskiego wybrzeża. Badania realizowane były przy użyciu różnych technik geodezyjnych, m.in. z zastosowaniem stabilizowanych w podłożu reperów, niwelatora, teodolitu. W ostatnich latach korzystano z nowoczesnych urządzeń, działających w oparciu o satelitarną lokalizację badanych miejsc, takich jak dGPS RTK oraz RTK GPS. Prace realizowane były w różnych skalach przestrzennych: od pomiarów punktowych, liniowych do powierzchniowych. Celem podjętych badań morfometrycznych było przetestowanie różnych technik i urządzeń badawczych pod kątem ich użyteczności w określaniu dynamiki współczesnej rzeźby najmłodszych wydm nadmorskich. Przedstawiono ustalenia potrzebne do klasyfikacji form i wskazania kierunku rozwoju wybrzeży mierzejewo-wydmowych w warunkach zmian klimatu i presji człowieka. Praca prezentuje możliwości wykorzystania dostępnych technik do określania parametrów zmian niestabilnej rzeźby wydm nadmorskich w różnych skalach czasowo-przestrzennych. W pracy zawarto przykładowe wyniki dynamiki rzeźby wydm i charakterystycznych wskaźników ich zmian oraz wybrane możliwości prezentacji graficznej. Badania prowadzono w wybranych miejscach obejmując 20% długości całego polskiego wybrzeża.

EN

The paper presents field research methods used to analyse relief changes of coastal dunes on the accumulative sections of the Polish coast. The research were carried out using a variety of surveying techniques, among others, using stabilized in the ground rods, leveler, theodolite. In recent years, the use of modern equipment, operating on the basis of satellite location, such as dGPS RTK and GPS RTK were used too. The work was carried out at different spatial scales, from the measurement point to line and the surface. The aim of this study was to test various morphometric techniques and research devices for their usefulness in determining the dynamics of contemporary relief of the youngest coastal dunes – foredunes. Paper also presents the findings needed to classify the relief forms and to indicate the direction of sand barrier and dunes development in conditions of climate change and human pressure. Work presents the possibilities of available techniques use, to characterise changes of unstable sand dunes in different time and space scales. This paper contains examples of the results on dune relief research dynamics and selected graphical presentation possibilities. Data from the realised studies are useful for different time scale comparison as vectors, volumes or 3D pictures. Those methods are clearly showing accumulation tendencies of some sections of the coast in different time and surface scale. The presented studies are covering almost 20% of dunes on the Polish coast.

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Comparing different post-IR IRSL approaches for the dating of Holocene coastal foredunes from Ruhnu Island, Estonia

Preusser F., Muru M., Rosentau A.

Geochronometria

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2014

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Vol. 41, no. 4

342--351

EN

Different post-IR Infrared Stimulated Luminescence (IRSL) approaches are applied to sediments from a Holocene coastal foredune sequence on Ruhnu Island in the eastern Baltic Sea. The comparison of D e-values and ages determined by the different approaches is complimented by fading and bleaching experiments. The fading experiments imply strong fading of IRSL (50°C) signals and no fading of any of the post-IR IRSL signals, but this is not confirmed by the determined D e-values. In fact, post-IR IRSL (150°C) D e-values agree within errors with those calculated for IRSL (50°C). From the bleaching experiments it is inferred that the higher values observed for post-IR IRSL at more elevated stimulation temperatures (225°C/290°C) are likely related to either thermal transfer and/or slow-to-bleach components within the signal. For the dating of the Holocene foredune sequence of Ruhnu Island, the post-IR IRSL (150°C) approach is preferred and these agree with the limited independent age control available from radiocarbon dating. Accordingly, the sequence formed between ca. 7.0 ka and 2.5 ka ago.

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Development of the Holocene foredune plain in the Narva-Jõesuu area, eastern Gulf of Finland

Rosentau A., Jõeleht A., Plado J., Aunap R., Muru M., Eskola K. O.

Geological Quarterly

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2013

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Vol. 57, No. 1

89--100

EN

The morphogenesis and inner structure of the Holocene foredune plain in the Narva-Joesuu area, eastern Gulf of Finland, were studied using optically stimulated luminescence (OSL) dating, ground-penetrating radar (GPR) study and interpretation of airborne LIDAR elevation data. The results show that the Narva-Joesuu foredune plain consists of ca. 100 parallel coastal foredune ridges built of well-sorted fine sand underlain by gently (~7°) seaward-dipping sandy beach deposits. The distal part of the plain, which consists of at least 15 ridges, formed during the regressive phase of the Ancylus Lake/Early Litorina Sea, serving as a barrier for the lagoon behind it. A larger portion of ridges, with an average progradation rate of 0.26 m a-1, formed under conditions of falling relative sea level during the Litorina regression and was separated from the older foredune succession by a hiatus related to the Litorina transgression at 8.5-7.3 cal. ka BP. In the highest central part of the plain the foredune growth was interrupted by foredune instability and a re-blowing episode dated to 5.4 ± 0.9 ka BP which may correlate with a larger regional cooling at 5.8-5.1 cal. ka BP in the North Atlantic and central Europe. During the last 3000 years, the foredune progradation rate decreased to 0.19 m a-1, most probably because of decelerated land-uplift and increased human impact due to coastal protection.