Nature Environment and Pollution Technology

Prabhat Kumar Behera ¹, S. N. Padhy ²

Affiliations
1 Department of Chemistry, Draupadi Junior College, Gumuda-765 024, Distt. Rayagada, Odisha, IN
2 Department of Marine Sciences, Berhampur University, Berhampur, Odisha, IN

Abstract

The study relates to the observation of various physico-chemical characteristics of the Bahuda estuary. The annual variation recorded was for temperature (22.84°C-30.48°C), salinity (14.42 -30.8 ppt), BOD (0.84-2.15 mg/L), DO (4.88-6.99 mg/L), pH (7.48 -8.44), nitrate (1.866-3.991 mg/L), ammonium (1.295-3.816 μg/L), phosphate (0.245-0.773 μg/L) and silicate (20.005-37.180 μg/L). The water temperature and salinity influence the hydro-chemical processes, which control the other parameters like pH, DO, BOD and nutrient levels in estuarine water. Temperature is positively correlated with salinity and negatively correlated with other water quality parameters of the estuarine water. The limits of water quality parameters were very less than the tolerance limits of fish growth. The BOD values in the estuarine water were relatively higher than other similar studies of the coast, which indicate the high productivity of the coastal water.

Keywords

Bahuda Estuary, Water Quality, Productivity, Anthropogenic Influence.

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T. Padmavati ¹, S. N. Padhy ¹, K. C. Sahu ¹

Affiliations
1 Department of Marine Sciences, Berhampur University, Berhampur-760 007, Orissa, IN

Abstract

The seasonal variability in the concentration of calcium and magnesium in coastal waters of Gopalpur, Bay of Bengal has been studied from March 2007 to February 2008. Salinity ranged between 19.48 and 34.44 ppt with an average value of 30.13 ppt. The calcium concentration varied from 0.313-0.451 g/kg with an average of 0.386 g/kg, and magnesium from 0.673-1.423 g/kg with an average 1.132 g/kg. The Ca/Cl ratio and Mg/Cl ratio ranged from 0.019-0.038 and 0.057-0.078 respectively. The concentration of calcium and magnesium was found to be higher in bottom water than the surface water. The ratio of Ca and Mg with chlorinity is proximity to the oceanic range. They were found to be lower in bottom water than the surface due to low saline surface water. The low range of variability of these in coastal waters indicates the insignificant inputs from extraneous sources. The average concentration of calcium and magnesium does not show much variability which reflects on the water quality parameters of Gopalpur coast.

Keywords

Chlorinity, Salinity, Calcium, Magnesium, Coastal Waters of Gopalpur, Bay of Bengal.

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