In the bed of the Rudnaja River( Primorye, Russia) the influents of the polymetallic mine tailings and processing factories affected the river water chemistry, especially heavy metal concentrations. Decreasing of production in the last 10–15 years was re In the bed of the Rudnaja River (Primorye, Russia) the influents of the polymetallic mine tailings and processing factories affected the river water chemistry, especially heavy metal concentrations. Decreasing of production in the last 10-15 years was re