Use of mathematical methods in the analysis and forecasting of nitrogen-phosphorus cycle indicators in the Pregolya river basin
... analyze long-term water quality monitoring data for the Pregolya River (Kaliningrad) in order to identify the main factors determining variability in the hydrochemical regime and to assess their temporal dynamics. To analyze data on indicators of the nitrogen and phosphorus cycles, methods of multivariate statistics were applied, including hierarchical cluster analysis (Ward’s method), factor analysis (minimum residual method with varimax rotation), and time-series analysis (LOESS smoothing). As ...
Spatial and seasonal distribution of nutrients in the estuarine system of the Pregolya River and the adjacent area of the Baltic Sea
... seasonal dynamics were characterized by maxima during the high-water period. Minima were observed in spring and summer during water “blooming” against the background of intense water warming. Spatial distribution was characterized by the highest nitrogen and phosphorus concentrations in the estuarine zone, where the Pregolya River inflow occurs. Episodic pollution exceeding the maximum permissible concentrations for ammonium and nitrite nitrogen was recorded in the eastern section of the ...
