The hydrochemical drain of the Middle Ob river basin

Abstract

Results of studying the hydrochemical drain in Middle Ob basin (Western Siberia) and conditions of its formation are shown. Average values of ejection of the main ions, microelements, organic and biogenic substances with waters of the rivers: Ob, Tom, Chulym, Ket, Тym, Vasyugan, Parabel, Chaya for years 1997-2000 are established. It is shown, that the main part of hydrochemical drain is represented by the main ions and formed under the influence of mainly natural factors. Anthropogenous transformation of hydrochemical drain shows itself in the increase of hydrocarbons ejection, compounds of nitrogen and some other substances.