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The stream bed of alpine tarns is heterogeneous. Forms and whole character of lake basins relief depend primarily on the level of their reformation by mountain glacier during the glacial stage and development of geomorphological processes in the surrounding of postglacial stage. Bathymetric survey creates the basis for the construction of bathymetric maps and DTM of lake basins. They complete the whole picture about the local geomorphological development of valleys and variety of their bases. They have the biggest...

After the regression of mountain glaciers, the typical forms of morainic lake basins were created in morainic deposits at the bottoms of the Tatras valleys. During some period they were filled by alpine lakes. During Holocene, a lot of lake basins were deformed by geomorphological processes. Frequently the lakes in them disappeared. Nowadays, it is possible to identify them by precise DTM of relief despite long time interval. In this article, we reconstruct defunct alpine lake in Zelen? pleso valley, its hypotheti...