Multivariate statistical techniques, cluster analysis (CA) and principal component analysis
(PCA) were applied to the data on water quality of Manchar Lake (Pakistan), generated …

Foi utilizada a análise por componentes principais (ACP) para avaliar os principais
parâmetros físico-químicos do Alto Rio Madeira e seus tributários, Estado de Rondônia …

The differentiation between the concentration of metals associated with suspended
sediments and those in the dissolved phase is often of importance in aquatic ecosystems, for …

The conservation of large water resources is essential for the preservation of human life. The
quantification and, more importantly, the speciation of chemical substances that indicate the …

abstract The aims of this study are threefold:(1) to determine the seasonal, vertical and
lateral variations in the concentrations of physicochemical water quality parameters [pH …

Seventeen physical and chemical parameters were obtained from a hydroelectric reservoir
located in a tropical region in the south of Brazil. Multivariate Principal Component Analysis …

The concentrations of the Al, Co, Cr, Cu, Pb, Sn, Ni, and Zn trace metals were monitored in
Lake Ipê (Brazil) during two hydrological sub-periods: June-December 1999 (low water …

Surface water samples were collected at 19 sites of the Capivara reservoir, Brazil, to
characterize the natural waters of the lake and to verify the impact of the urban activities on …