ISSN: (Online) 2321 -4155
ISSN: (Print) 2320 -7000




VOLUME : 5, ISSUE : 3, July-September, 2017 (ISSN No. : 2321-4155)

Changing Trends of Some Bio-Physico-Chemical Characteristics

of Sagardighi of Cooch Behar, West Bengal, India

Abdul Miraj & Sudip Kumar Bhattacharya

Present work was designed to study the changing trends of some important bio-physicochemical characteristics of Sagardighi of Cooch Behar, West Bengal, India. To evaluate the water quality of the lake, bio-physico-chemical parameters (tested by West Bengal Pollution Control Board, Siliguri laboratory) were studied on the monthly basis for a period of five years between June 2011 to May 2016. There were seven physical parameters , interalia, Temperature, pH, Total Dissolved Solid (TDS), Total Suspended Solid (TSS), Total Fixed Solids (TFS), Turbidity, and Electrical Conductivity (EC); thirteen chemical parameters, interalia, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Alkalinity (TA), calcium, magnesium, chloride, sulphate, sodium, phosphate, nitrate-N, potassium, Total Hardness (TH) and two bacteriological parameters, Total Coliform(TC) and Fecal Coliform(FC). The present work provides baseline information on changing trends of bio-physico-chemical status of Sagardighi. This would facilitate sustainable management and conservation of ecosystem of this lake. The data obtained from this study reveals that the bio-physico-chemical parameters of Sagardighi of Cooch Behar are comparatively in moderate condition but almost all the parameters are prone to cross the critical pollution level, if necessary action is not taken in time.
Keywords: Bacteriological Parameters, Changing Trends, Chemical Parameters, Physical Parameters, Sagardighi.