Analysis of flow conditions and possibilities of protection against erosion of right bank of Vistula river (section: 599–600 km)

The analysis of flow and river bed conditions of the Vistula River on section km 599-600 km are presented in the paper. That section of the river has not been regulated yet. River bed is irregular with numerous islands and rich vegetation. Due to nature value of the river section the nature reserve “Kępa Antonińska” was established there. The river causes a risk of erosion of flood protection embankments. However, technical solutions for improving of river bed stability can not be applied there due to requirements of environmental protection. The analysis of solutions suggested by naturalists indicated that are not considering in satisfactorily degree the specific of fluvial processes. Application of those solutions will lead to deterioration of morphological condition in river bed on the nature reserve area. ...

CHANGES OF WATER POLLUTION DYNAMICS IN VISTULA RIVER ON WARSAW CITY AREA

The paper presents change of water quality within Vistula River in the city of Warsaw. Water samples for analysis were taken from four different measurement points in the period from February to June 2016. Based on the results of laboratory studies it was demonstrated that the Vistula River in Warsaw is exposed to the input of pollutants contributing to increase the salinity, especially in winter and early spring. The concentration of both chlorides and sulphates were highest in February and was decreasing in subsequent months of the year. At the same time it has been shown that during the entire study period the concentration of Cl- ion exceeded the limit values for water quality II class in Poland. While the SO42- concentrations in water samples taken in the winter months (February-March) exceeded the limit values for the second quality class, in April, it was within the acceptable range for II class water quality, and in May and June does not exceed the value referred to as standard for I class of water quality. Based on the analysis of indicators of nutrients (N-NH4, N-NO3, Ptot.) it was found that the Vistula is not exposed to eutrophication due to their low ...