EVALUATION OF NITRATE AND NITRITE CONTENTS IN WATER OF CHILIKA LAGOON, ODISHA, INDIA.

Environmental Sciences

Wetland science is emerging as an unique discipline encompassing the terrestrial and aquatic ecology i.e. hydrology, limnology and engineering. Wetlands are receiving much international attention during past few decades with the better understanding of their values and functions. The quality of surface water of Chilika lagoon with respect to physico- chemical parameters was investigated. The present investigation on evaluation of water quality such as Nitrate and Nitrite content of Chilika Lagoon will primarily address the changing characteristics and will be a step for formulating an action plan for integrating ecological, social and economical dimensions to promote sustainable development of the lagoon. The variables that are related to pollution sources showed differences. For the study of physico-chemical properties of water, the samples were collected monthly for a period of 2 years from July 2011 to June 2013 from six different sampling stations which spread over all the ecological sectors. Collection of samples was made from the predetermined stations of the water body by holding the polythene bottle (5 L. capacities). The samples were brought to the laboratory for analysis. At the spot of the sampling sites, the temperature of water was recorded. The water samples were analyzed in the laboratory by standard methods (APHA, 2004). The water samples were then filtered and were used for the measurement. Among the stations, Palur Canal shows the highest value of nitrate content i.e. 4.565 ±1.941 mgl-1 in winter season and Kalupada Ghat shows the lowest value of nitrate content i.e. 0.247 ±0.098 mgl-1 in winter season. Among the stations, Barakul shows the highest value of nitrite content i.e. 0.638 ± 0.402 mgl-1 in rainy season and Barakul shows the lowest value of nitrite content i.e. 0.003± 0.001 mgl-1 in winter season.

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