International viewpoint and news |
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| Authors: | Anne Marie de Grosbois |
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| Institution: | (1) Institute of Geology and Geography, Ševčenkos 13, LT-03223 Vilnius, Lithuania;(2) Vilnius University, Čiurlionio 21, LT-03123 Vilnius, Lithuanian;(3) Geological Survey, Konarskio 35, LT-03123 Vilnius, Lithuanian;(4) Institute of Maritime and Cultural Landscapes, Klaipėda University, H. Manto 84, LT-92294 Klaipėda, Lithuania; |
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| Abstract: | The investigations were carried out in order to evaluate change of the beaches profile during the period 1993–2008 and to
elucidate main trends of the coastal dynamics. Morphometric indicators (beach width, height and inclination) were measured
every year during the period 1993–2008 in 70 measuring stations located along the coastline. It was determined that the dynamic
shoreline of the mainland during 1993–2008 receded by 10.2 m and the dynamic shoreline of the Curonian Spit advanced into
the sea by 8.3 m. The different morphometric beach indicators changed to varying extents over the period 1993–2008, but comparison
of values for 1993 and 2008 showed that those changes were small. The average beach width increased by 1.2 m on the mainland
coast and by 0.5 m on the Curonian Spit coast. The average beach height also increased negligibly: by 0.5 m on the mainland
coast and by 0.1 m on the Curonian Spit coast. The average beach slope inclination increased by 0.012 (from 0.065 to 0.077)
on the mainland coast and by 0.005 (from 0.073 to 0.078) on the Curonian Spit coast. The measurements show that, despite being
the most dynamic elements in the coastal system, these beaches managed to retain their morphometric indicators almost unchanged
during the period of observation. |
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