Algimantas Česnulevičius

Changes in Blowout Segments of the Main Ridge in the Curonian Spit in 1999–2003

The article describes changes of relief characteristics of the Main Dune Ridge of the Curonian Spit. Investigations were carried out on the basis of repeated levelling in dynamic segments of the Main Ridge. The article also characterises relief forms of deflationary origin in accumulation of eolian formations. Investigations enabled to determine different accumulation-deflation areas in the unstable Juodkrantė–Pervalka section. Investigation results allowed the forecast of dynamic stability and development tendencies of the Main Dune Ridge. The dynamics of the dunes preconditions the distribution of plant communities in eolian formation.

Coastal Dunes of the Baltic Sea Shores: A Review

Abstract The article summarises results of studies conducted along the Baltic Sea sandy coasts by scientists involved in coastal dune research, and presents an attempt to describe the types and distribution of dune coasts. The Baltic Sea coasts feature lower and higher foredunes. The lowland behind the coastal dune belt is covered by wandering or stabilised inland dunes – transgressive forms, mainly parabolic or barchans. The source of sediment for dune development includes fluvioglacial sands from eroded coasts, river-discharged sand, and older eroded dunes. Due to the ongoing erosion and coastal retreat, many dunes have been eroded, and some are withdrawing onto the adjacent land. There are visible differences between the south-eastern, western, and northern parts of the Baltic Sea coast with respect to dune development. The entire southern and eastern coast abounds in sand, so the coastal dunes are large, formerly or currently wandering formations. The only shifting dunes are found at the Polish and the Russian–Lithuanian coasts on the Łebsko Lake Sandbar as well as on the Vistula and Curonian Spits. The very diverse shoreline of the south-western coast experiences a scarcity of larger sandy formations. Substantial parts of the Baltic Sea sandy coasts have been eroded or transformed by humans. The northern part of the Baltic Sea coast features mainly narrow and low sandy coasts (e.g. in Estonia). Further north, sandy dunes are virtually absent.

Correction to: Applicability of Unmanned Aerial Vehicles in Research on Aeolian Processes

Due to an unfortunate error during the typesetting process, the authors and co-authors names and given names were interchanged.

GAMTINIŲ TEMINIŲ ŽEMĖLAPIŲ KLASIFIKACIJOS PRINCIPAI BEI JŲ SĄSAJOS SU TAIKOMOMIS KOMPIUTERINĖMIS PROGRAMOMIS

Santrauka Atlikus 1900–2001 m. Lietuvoje poligrafiniu būdu isleistų geografinių žemėlapių ir atlasų analize paaiskėjo, kad gamtos reiskinių kartografiniai kūriniai sudaro apie 67 % visos kartografinės poligrafinės produkcijos. Tolydaus pobūdžio reiskiniams kartografuoti placiausiai taikyti kokybinio bei kiekybinio fonų, arealų izolinijų ir kartogramų metodai bei papildomi vaizdumo teikiantys būdai, o diskretiesiems—ženklų, linijinių ženklų, judėjimo ženklų, kartodiagramų, taskų ir lokaliųjų diagramų metodai. Atsižvelgiant į kartografuojamų reiskinių apibendrinimo laipsnį, isskirtos dvi teminių žemėlapių kategorijos: sintetiniai ir specializuotieji. Pastarieji grupuojami pagal geosferini principą Isskirti sie klasifikaciniai požymiai: kartografuojamų reiskinių klasė, makrorango teritorinis darinys, žemėlapio temos mokslinis kryptingumas, žemėlapio temos mokslo saka, elementarioji ar kompleksinė žemėlapio tema. Teminė žemėlapių klasifikacija susieta su taikomomis kartografavimo kompiuterinėmis programomis. ...