Abstract
Hydrochemical data collected in field studies in the near-mouth area and delta of the Don R. (Aksay T.—the mouths of Don delta branches) in 2006–2015 are analyzed. The seasonal dynamics is demonstrated, and the average annual concentrations were evaluated for mineral, total dissolved, and total forms of nitrogen, phosphorus, silica; dissolved and particulate organic carbon; and total suspended solids in river water. The export of dissolved and particulate organic carbon and nutrients by the Don River into the Sea of Azov in the low-water period of 2007–2015 is evaluated. Retrospective analysis of nutrient export into the Sea of Azov with river runoff in the XX–early XXI century is given.
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