Floodplains are highly valuable, but highly endangered ecosystems. Restoration programs need to carefully consider their multifunctionality, ecological value and the provision of ecosystem services. The example of the Danube River illustrates the impacts of various restoration measures.

The quality and quantity of crustacea groups the hydrochemistry of water and bottom sediments conditions, in the six selected anthropogenic hollow ponds in the central part of Silesian vojcvodship are presented taking into consideration. On strongly deformed area of the Silesian region one can find water reservoirs acljojning each other but differing the hydrochernical components. The nearness of spoil banks and slag damps affects hydrochemistry of water. In the inspected hollow ponds 20 taksons of Cladocera and 14 taksons of Copepoda were indentified. In the benthos zone these were determined 18 taksons of Cladocera and 14 taksons of Copepoda. In the pelagial zone 19 tak sons of Cladocera and I O tak sons of Copeopda. Were identified the number of taksons in the investigated hollow ponds does not depended on dissolved mineral mailer concentrations.

From March to October 1998 carried out hydrochemical and hydrobiological researches on retentional water reservoir Przeczyce on the Czarna Przemsza river were. Surface area of this reservoir is 570 ha. Maximal depth is 10 m, total volume 20 mln m3• In results self-purification processes water in the ecosystem is in I and II quality class. In the saprobity clasassification it is in betamezosaprobic class. Low number of macrobenthos organisms is the result of the Czarna Przemsza river pollution. In the I Part of this paper results of hydrochemical investigation was given.