EWOLUCJA POWIERZCHNI I RZĘDNEJ ZWIERCIADŁA WODY JEZIORA MIEDZNO

Abstract

The changes in area size and elevation of water surface of the Miedzno lake were studied in the paper. The study was carried out on the basis of the analysis of archival cartographic materials, technical documentations and published works. From the first half of the 19th century the Miedzno lake area was about 125 - 135 ha and the lake water level elevation approx. 85.0 m a.s.l. In the period from the mid-19th century to the 1990s the Miedzno lake water table elevation decreased to about 81.0 m a.s.l. and the lake surface area decreased to approx. 8-10 ha.