title: Statistical analysis of trends in organic pollution and pollution by nutrients at selected Danube river stations.
abstract: The paper describes an application of a statistical analysis for estimating long-term trends in pollutant concentrations of selected pollutants in the Danube river. The results show the changes of concentrations of NH(4)(+)-N, NO(3)(-)-N, PO(4)(3-)-P, total P, BOD(5) and COD(Cr) in a ten year period with the aim to find how the concentrations vary in the whole stretch of this river. The study was based on the data collected in the frame of Transnational Monitoring Network of the ICPDR. To obtain plausible results we have chosen statistical methods, such as tests based on the Spearman correlation coefficient and median regression, which are not sensitive to departures from normality as high skewness or outliers.
authors.affiliation: Faculty of Civil Engineering, Czech Technical University, Thakurova 7, CZ 166 29 Praha 6, Czech Republic. jarus@mat.fsv.cvut.cz
authors.forename: Daniela
authors.initials: D
authors.lastname: Jaruskova
authors.forename: Igor
authors.initials: I
authors.lastname: Liska
mesh_terms: D001317:Austria; D057919:Biological Oxygen Demand Analysis; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data*; D014881:Water Supply / Q000032:analysis / Q000706:statistics & numerical data
chemical_list: D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen