Water quality assessment of the ecologically stressed Hooghly River Estuary, India: A multivariate approach
| Autor: | Pravakar Mishra, Swayambhu Ghosh, Santosh Kumar Sarkar, Kamala Kanta Satpathy, Soumita Mitra, Bhaskar Deb Bhattacharya, P. Raja |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
India 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Phosphates chemistry.chemical_compound Enterobacteriaceae Rivers Nitrate Water Quality Cluster Analysis Water Pollutants Turbidity Nitrites 0105 earth and related environmental sciences Hydrology Principal Component Analysis geography Nitrates geography.geographical_feature_category Silicates Estuary Biota Total dissolved solids Pollution Water level Fecal coliform chemistry Environmental science Seasons Water quality Estuaries Environmental Monitoring |
| Zdroj: | Marine Pollution Bulletin. 126:592-599 |
| ISSN: | 0025-326X |
| DOI: | 10.1016/j.marpolbul.2017.09.053 |
| Popis: | Spatio-temporal and seasonal variation of the water quality characteristics of the Hooghly River Estuary, India were studied considering eight stations of diverse eco-hydrological characteristics. Wide variations in turbidity, total dissolved solids and fecal coliform exceeded the permissible BIS drinking water level limit. The estuary is observed to be relatively low-oxygenated, mesotropic and phosphate limiting. Spatial heterogeneity and impact of the southwest monsoon were remarkably pronounced in the distribution of the inorganic nutrients revealing the following values (expressed in μgatml-1): nitrate+nitrite (2.42-37.19), phosphate (0.41-1.52) and silicate (38.5-187.75). Water Quality Index (WQI) values confirmed the prevailing 'bad' condition, detrimental for sustenance of aquatic biota. Results of Principal Component Analysis identified the major factors liable for water quality deterioration while cluster analysis categorized the stations on the basis of similar water quality status. The authors recommend adopting preventive measures for water quality improvement linked to biodiversity conservation. |
| Databáze: | OpenAIRE |
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