Assessment of spatial variations in the surface water quality of the Velhas River Basin, Brazil, using multivariate statistical analysis and nonparametric statistics
| Autor: | Sílvia Corrêa Oliveira, Carolina Cristiane Pinto, Giovanna Moura Calazans |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Drainage basin Sewage 010501 environmental sciences Management Monitoring Policy and Law Structural basin 01 natural sciences Statistics Nonparametric Rivers Water Quality Surface water quality Cluster Analysis Water pollution 0105 earth and related environmental sciences General Environmental Science Hydrology geography geography.geographical_feature_category business.industry Water Pollution Nonparametric statistics General Medicine Pollution Multivariate Analysis Erosion Environmental science Water quality business Brazil Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental monitoring and assessment. 191(3) |
| ISSN: | 1573-2959 |
| Popis: | The Velhas River sub-basin, which is located in the third-largest river basin in Brazil (Sao Francisco), is in an advanced state of degradation. In this work, the surface water quality of the Velhas River Basin was studied at 65 monitoring sites; 16 water quality parameters were sampled quarterly for 11 years (2008 to 2013). Cluster analysis (CA) and a nonparametric Kruskal–Wallis test were associated with the analysis of violations to water quality standards to interpret the water quality data set from the Velhas River Basin and assess its spatial variations. The CA grouped the 65 monitoring sites into four groups. The Kruskal–Wallis test identified significant differences (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink