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Alar Rosentau, University of Tartu (Estonia)
Jüri Vassiljev, Tallinn University of Technology (Estonia)
Leili Saarse, Tallinn University of Technology (Estonia)
Aivar Kriiska, University of Tartu (Estonia)
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During the past decade the reconstruction of palaeo-coastlines in formerly glaciated areas is based on GIS analysis by which glacioisostatically deformed water level surfaces were subtracted from the modern digital terrain model (DTM). There are two different techniques available for water level surface interpolation in order to reconstruct palaeo-coastlines. First technique uses geostatistical correlation of coastal landforms of the same age and the second technique utilises the interpolated shore displacement curve data.
This study examines the possibilities to combine these two techniques in order to create a continuous time-space water-level change model of the West-Estonian coast of the Baltic Sea. Baltic Sea shoreline database for the Estonia contains about 1200 sites from Baltic Ice Lake, Ancylus Lake and Littorina Sea stages. For the modelling the database was combined with a shore displacement curve from Pärnu area (West-Estonia) to create a continuous water-level change model for the region for the last 13 300 calendar years.
Timing of the model was derived from the ages of the ice marginal positions, varvochronology and radiocarbon dating. This model was applied together with DTM to reconstruct the coastline change in western Estonia and to examine the relationships between coastline change and migration of pre-historical man who moved together with transgressions and regressions on the shifting coastline of the Baltic Sea.
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