Regime of dissolved oxygen in small rivers by varied human impact

The paper concerns seasonal dynamics of dissolved oxygen content in two small rivers; first river - Peschanka - belongs to industrial site of Voronezh city and second river - Tavrovka - flows through suburban area that mostly occupied by gardens and fields. First stream is characterized by lower content and higher extent of oxygen than second stream. One of the reasons is higher concentrations of pollutants that require more oxygen to oxidation. Human impact to second stream is lower but oxygen content in this river sometimes falls to critically low values. To reveal more factors and mechanisms of human impact to regime of dissolved oxygen in small rivers it is necessary to continue this investigation.