THE ASSESSMENT OF WATER QUALITY OF THE RIVER OMULEW AND ROZOGA BASED ON THE MACROPHYTES

The paper presents the assessment of water quality of the rivers Omulew and Rozoga with Macrophytes Method of Assessing Rivers (Mmore). The method uses the indicating features of the aquatic plants. An inventory of the vegetation for species composition and participation in covering the surveyed positions has been carried on selected 100-meter sections of the both rivers. The obtained data, in line with the adopted method, allowed to develop the quantitative and qualitative characteristics of aquatic vegetation within the designated sections of rivers. Subsequently, they gave foundation to determining the degree of degradation, associated with the trophic pollution of the rivers, expressed in Macrophyte River Index (MIR). Based on the range of values of the trophic and ecological tolerance, waters of the surveyed rivers acquired the characteristics of the mesotrophic environment, meanwhile in the Omulew river significant (4.5%) share in covering the ground had sensitive to the pollution Ranunculus aquatilis. According to the calculated values of the MIR, the river Omulew water was classified as Class II of the water quality and good ecological status. MIR for the tested Rozoga river section was appropriate for Class III of the water quality and medium ecological status