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Open AccessArticle

Beach-Foredune Sediment Budget Response to Sea Level Fluctuation. Curonian Spit, Lithuania

Laboratory of Geoenvironmental Research, Nature Research Centre, Akademijos 2, LT-08412 Vilnius, Lithuania
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Water 2020, 12(2), 583; https://doi.org/10.3390/w12020583
Received: 14 January 2020 / Revised: 7 February 2020 / Accepted: 17 February 2020 / Published: 20 February 2020
(This article belongs to the Special Issue Relative Sea-Level Changes and their Impact on Coastal Zones)
Beach-foredune sediment exchange maintains a coastal system’s stability. Sea level fluctuation is one of the most important factors that modifies the beach and foredune sediment budget. This study aims to assess beach and foredune sand budget changes depending on sea level fluctuations. On the basis of annual measurements of cross-shore profiles on the Curonian Spit in Lithuania, the sediment volumes on the beach and foredune and their changes between 2002 and 2019 were calculated. The sea level fluctuations were examined in parallel. The obtained data revealed that in the case of a sand surplus, a relatively low sea level rise does not have a significant impact on the development of a foredune (and a minimal impact on a beach) on a decadal time-scale. Short-term sea level fluctuations are reflected in year-to-year variability in a beach sediment budget. However, no significant relationship between year-to-year variability in sea level fluctuation and the foredune sediment budget has yet been identified, nor is there a reliable year-to-year variability relationship between the foredune and beach sediment budget. The foredune sediment budget remained positive both through an increase and a reduction in the sediment volume on the beach. View Full-Text
Keywords: sea level; coastal erosion; coastal morphometry; Baltic Sea sea level; coastal erosion; coastal morphometry; Baltic Sea
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Jarmalavičius, D.; Pupienis, D.; Žilinskas, G.; Janušaitė, R.; Karaliūnas, V. Beach-Foredune Sediment Budget Response to Sea Level Fluctuation. Curonian Spit, Lithuania. Water 2020, 12, 583.

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