Space-time variations of river water chemistry in RF southern Far East

Concentrations and seasonal variations of water chemistry, including dissolved and particulate forms of Fe, Mn, Zn, Cu, Pb, Cd, and Ni in rivers of Primorskii Krai are determined. It is shown that, unlike the macrocomposition, the effect of hydrological regime on the concentration of dissolved metal forms is controversial and depends on anthropogenic load, watershed landscapes, and pH variations. Elevated concentrations of dissolved metal forms are recorded in the beginning of spring flood and during low-water period. Beyond the limits of local impact of wastewater, the concentrations of dissolved forms of Cu, Zn, Ni, Pb, and Cd in river waters of the region insignificantly differ from the clearest rivers of the World.