Distribution of the Silicon, Iron and Oxidizability in the Water Bodies of the Pavlodar Еrtis Region

The materials of our own research on the distribution of silicon, iron and the value of permanganate oxidability in the Irtysh River basin in the summer of 2023 presented. It has been established that the content of these components and their ratios are not the same in the water of rivers and lakes. The values of permanganate oxidizability (PO) for the water of the Irtysh River in most cases did not exceed the average values for natural waters of arid zones (5…10 mgO/dm3), as well as the maximum permissible concentrations for fishery waters. The water of floodplain lakes and storage lakes is more enriched with easily oxidizing organic substances (8.62…31.51 mgO/dm3). The maximum concentrations of silicon did not always correspond to the minimum values of total mineralization. The distribution of dissolved total iron is uneven and varies between 0.072...1.740 mg/dm3, with a maximum concentration in oz. Kurkol and the Balkyldak storage lake. From the upper to the lower sections of the Ertis, there was a slight increase in the concentration of iron and silicon, as a result, of the influence of an anthropogenic factor. The assessment of the quality of the water bodies of the Pavlodar Irtysh region was carried out on the basis of a Unified water quality classification system. The relationship of the average strength between silicon, iron and the value of PO is revealed. The data on the distribution of these components can be used for a more complete assessment of the water quality of the Yertis basin.