Title: ASSESSMENT OF WATER QUALITY OF THE LOWER MEGHNA RIVER ESTUARY USING MULTIVARIATE ANALYSES AND RPI
Author(s): Sharif A. S. M, Bakar M. A and Bhuyan M. S
The present study was conducted to evaluate the surface water quality of the lower Meghna River Estuary using chemical parameters of water. Water Temperature, Secchi Depth, Total Suspended Solid (TSS), Total Organic Matter (TOM), pH, Dissolve Oxygen (DO), Biological Oxygen Demand (BOD5), CO2, Alkalinity, HCO3– and Salinity concentrations in water samples were found to be ranged from 21-31ºC, 4-65 cm, 0.317-10.83 mg/l, 0.483-0.86 mg/l, 6.4-7.0, 1.9-5.5 mg/l, 0-38 mg/l, 0.33-0.99 mg/l, 0.7-2.1 mg/l, 0.000-0.0004 mg/l and 0-15 ‰ respectively. River Pollution Index (RPI) indicated that the water of river at Sandwip, Hatiya, Bhola, Barishal and Chandpur was less to highly polluted. Correlation Matrix (CM) and Multivariate statistical analyses namely Cluster Analysis (CA), Principal Component Analysis (PCA) and Factors Analysis (FA) indicated that river water was polluted and the principal causes were due to unplanned and haphazard industrialization, domestic and municipal wastes and agricultural inputs. Furthermore, the results advocate that PCA and CA techniques are useful tools for valuation of water quality. River water uses without treatment may generate serious problems to human health by biological food web. This study suggest to proper management of the river with eco-friendly mechanization for the sustainable and long lasting economic growth of the country.
Keywords: Water Quality, Multivariate Analyses, River Pollution Index, Industrialization, Meghna River Estuary.