Water sample collection and Analysis: Water samples from Kangsabati Reservoir were collected from the three spots viz.
north, south and east point during last week of each month from March, 2010 to February, 2011 at 8 A.M - 9.30 A.M in clean plastic air tight bottles. For Dissolved Oxygen(D.O.) analysis, water sample was collected in clean 100 ml bottles of glass. The water and air temperature were recorded by minimummaximum hydro-thermometer and thermometer respectively; pH by pH meter (Systronics Model – 335); conductivity by conductivity meter (Labtronics model – LT 16); dissolved oxygen by Winkler’s method; photic depth by Secchi disc method; free CO2, alkalinity, Chloride, Phosphorus, total inorganic nitrogen, Calcium, Magnesium and hardness by APHA. Rainfall data of the concerned period was recorded and supplied by the Office of the Sub divisional Officer, Kangsabati left bank subdivision no. II, Mukutmanipur, W.B.