Assessment of wetlands by the methods of waterchemistry and bioindication

Wetlands across Europe suffered the greatest damages of all habitats. The state of surface waters is determined by their ecological and chemical conditions. The ecological state is defined by the physico-chemical, hydromorphological and biological characteristics of the water, while the chemical state depends on the measured concentration of contaminants. The flora and fauna of stagnant water bodies and rivers respond sensitively and specifically to such impacts [1]. The Water Framework Directive (WFD) of the European Union (2000/60/EK) aims to provide solutions for this situation. In Hungary, the National Water Catchment Management Plans (NWCMPs) mean the tools for the implementation of the WFD. The pilot project was the assessment of Lake Riha which is a protected oxbow lake on the Mohács Island.