title: Valuation of characteristics of water purity. III. The use of numerical methods for qualitative and quantitative evaluation of the degree of pollution.
abstract: The taxonometric methods of centrifugal correlation and principal components were used to classify sites along the investigated river with respect to quantity and quality of pollution. The degree of pollution was determined with the use of a collection of microbiological, hydrobiological and chemical characteristics selected by statistical methods.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D056890:Eukaryota / Q000302:isolation & purification; D005069:Evaluation Studies as Topic; D005618:Fresh Water; D008954:Models, Biological; D011044:Poland; D014871:Water Microbiology; D014876:Water Pollution / Q000032:analysis*