Title Influence of hydrotechnical structures on the dynamics of sandy shores: the case of Palanga on the Baltic coast
Authors Vytautas Dubra
Publication date 2006
Abstract [eng] Abstract. The aim of the present paper is to survey new tendencies in coastal erosion using the example of the processes observed on the coastal area near Palanga, located on the eastern shore of the Baltic Sea. Due to the groyne that was put into action in the period 1888-1910, the shoreline moved seawards by 500 steps (each 0.7 metres long), and by 1947 it had additionally moved 100 metres. As a consequence of it, a new cape-shaped formation appeared near Palanga. In 1997-1998, after the removal of the under-pier groyne in Palanga, aggressive coastal erosion occurred there. First removed, later the groyne was brought back into the system. Even though the reconstructed groyne is smaller in its dimensions than the previous one, its influence on the coastal zone is evident. An average beach area in the dynamically most active zone of the Lithuanian coast from Birutė Hill up to the mouth of the River Rąžė (Ronžė) widened approximately by forty percent. The final dynamical equilibrium of the shoreline in the investigated zone has not formed yet. The scale of extreme cyclonic atmospheric structures and their recurrence in this region will determine the character of this process.
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