Macro- and Microelement Water Composition of the Volga River Delta and Its Interannual Variability

Abstract

Spatial variations of the chemical composition of the Volga River delta waters and its interannual variability were estimated on the basis of long-term data on the content of macro components, biogenic ele-ments, and trace elements. It was shown that the significant transformation inside the delta is peculiar only to the biogenic element runoff, which is influenced by production–destruction processes, whereas the migra-tion of the major ions and dissolved trace elements in the delta watersheds occurs without any essential vari-ations.