Small midfield ponds play in agricultural landscape important functions: natural, hydrological and economical. However, they are exposed to very strong anthropogenic impact. Valorization research of water ponds enables to point out the most valuable objects, which should be protected by law, for example as ecological sites. Active protection of water ponds in agricultural landscape is possible by using them to drainage water retention. The methods of ecological and land reclamation valorization of small ponds are presented in this paper. An ecological valorization of small ponds was based on: pond area, hydrography, pond flora, coastal zone, pond shelterbelts, land use around pond, and anthropogenic impact. Land reclamation usefulness was evaluated on the basis of: pond area, morphology, hydrography, dam building and periodic occurrence of small ponds.
The paper presents a list of flora taxa of the cultivated fields of General D. Chłapowski Landscape Park as well as their general characterisation. The segetal flora of the researched area consists of 215 species. 22 of them are on the list of threatened segetal plants.
The removal of the nutrients: different forms of nitrogen, phosphorus and carbon, by two constructed wetland systems with reed (Phragmites australis) was investigated between the spring 2000 and the summer 2001. Two systems: reed pond with surface flow and sand reed bed with subsurface flow, have been compared Both the systems show high performance wastewater purification during whole vegetation season. Higher removal of nitrogen forms and organic carbon was observed in the reed bed with subsurface flows. This can be caused by higher biomass and density of plants than that, in reed pond with surface flow. The content of phosphorus in both systems significantly increased.