Zakwaszenie osadów dennych jeziora Nowowarpieńskiego

The studies of properties the muddy bottom sediments from Nowowarpieńskie Lake (10,9 - 26,2% of organic matter), carried out before putting the ferry line Nowe Warpno - Altwarp into service showed on their very strong acidification (pHKCl below 2), especially on the depth 40 - 50 cm below of the lake bottom. In 1996 - 1997 years the ferry navigation service disturbed the previously existing sequences of bottom sediments and changed their properties among others also their reaction from very strong acid to weakly acid or neutral.