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

Genesis of Narew river valley and of neighborhood area in the geology and geomorphological research of Ne Poland

Przeprowadzone analizy porównawcze służą powiększeniu aktualnego stanu wiedzy z zakresu dynamiki systemu fluwialnego w krajobrazie nizinnym. Dolina Narwi z terenami bezpośrednio przyległymi rozwinęła się w czwartorzędowych osadach i jest efektem zaniku plejstoceńskich pokryw lodowcowych i zmian w czasie holocenu.The performed comparative analyses aimed at increasing the actual knowledge on the fluvial system dynamics in a lowland landscape. The Narew River Valley with neighborhood area developed in Quaternary sediments and is an effect of the deglaciation course of the Pleistocene glaciers and the changes during the Holocene

CHANGES IN THE MIDDLE SECTION OF THE NAREW RIVER (BETWEEN OSTROŁĘKA AND ŁOMŻA) IN VIEW OF NATURAL FACTORS AND ANTHROPOGENIC PRESSURES

Contemporary and archive cartographic materials illustrating horizontal profile of the middle channel of the Narew River (between Ostrołęka and Łomża) were compared in the GeoMedia application. The results of the analysis revealed that natural and anthropogenic factors had not significantly contributed to changes in the channel profile over a period of two centuries. Narew is a meandering river, and its activity is associated with intensified erosion of right-bank bends and lateral movement along its flat-bed channel. The most noticeable changes include reduced area of oxbow lakes, mainly due to succession, and suburban settlement in floodplains that had been regarded as unfit for development in the 20th century