Ewolucja systemu hydrograficznego i szaty roślinnej dorzecza górnej Piławy i górnej Drawy (Pomorze Środkowe)

TL;DRAbstract

Evolution of the hydrographic system and vegetation in the drainage basin of the upper Pilawa and the upper Drawa Rivers (Middle Pomerania). A b s t r a c t. Highly varied hydrographic system occurs in the drainage basins of the upper Pilawa, Plytnica and Drawa Rivers (Middle Pomerania). Numerous radiometric dating carried out by the methods of 14 C, OSL and U/Th, as well as pollen analyses and geomorphological analysis enable to study evolution of the system in the period of the last twelve thousand years. Glaciolacustrine deposits, accompanying most of the lakes, represent accumulation, which took place at the initial stage of the lacustrine basin formation. The level of lacustrine waters fell by several to more than a twelve meters in that time and was controlled by melt water runoff channeled through valleys in the southern direction. The final stage of the lake development was connected with complete melting of buried dead-ice masses and formation — bottoms of lake. Evolution from

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