Results of statistical processing of simultaneous hydrological and hydrochemical characteristics of runoff from small rivers in Northwestern Russia (case study of the Upper Erga river)

Statistical processing of simultaneous multiyear field observations of biogenic pollutants and water discharges in a small river is carried out for the northwestern region of Russia. Stress (in terms of water pollution) periods are found. Estimates of the distribution parameters are considered, results of autocorrelation and correlation analyses are presented, and the results obtained are discussed.