A study on Physico-chemical parameters and correlation analysis of surface water of Nawabganj lake

A study of the physico-chemical parameters on surface water of Nawabganj Lake was conducted from summer and winter. Surface water was collected from twenty different stations along the Lake. Water samples were collected and analysed for physico-chemical variables. The average value of surface water on winter-summer the pH was 7-7.042105; EC (Electrical Conductivity) 524.8-492.5µs/cm, Tub. (Turbidity) 4.9-5.5NTU, DO (Dissolve Oxygen) 6.65-6.61Mg/L, BOD (Biological Oxygen Demand) 3.55-3.3Mg/L, TDS (Total Dissolve Solids) 322.95-300.7Mg/L, TS (Total Solids) 459.95-422.3Mg/L, Cl (Chloride) 50.9-43.15Mg/L, SO4 (Sulphate) 25.5-26.25Mg/L, N (Nitrate) 5.95-5.35Mg/L, Na (Sodium) 30.25-29.85Mg/L, K (Potassium) 3.835-3.76Mg/L, Mg (Magnesium Hardness) 73.7-72.25Mg/L, PO4 (Total Phosphorus) 0.134-0.124Mg/L, COD (Chemical Oxygen Demand) 12.3-13.1Mg/L, T.C.(Total Coliform) 376-347.5MPN/100ml, F.C.(Feacal Coliform) 191.5-142.95MPN/100ml, F (Fluoride) 0.595-0.645Mg/L, Fe (Iron) 0.3545-0.3345Mg/L, Zn (Zinc) 0.0975-0.07Mg/L. The databases obtained were subjected to Pearson correlation matrix. Correlation coefficients revealed positive and significant correlations between the pairs of parameters and metals in surface water. The major variations are related to anthropogenic activities (irrigation agricultural, construction activities, clearing of land, and domestic waste disposal). The present study, however, makes several is believed to serve as a baseline data for further studies. Future research should therefore noteworthy contributions to the existing knowledge on the spatial variations of surface water quality and concentrate on the investigation of temporal variations of water quality in the lake. The lake is gradually tending towards eutrophication.