Assessment of surface water quality by evaluating the physico-chemical parameters and by checking the water quality index of Nigeen Basin and Brari Nambal Lagoon of Dal Lake,Kashmir

This work evaluates the surface water quality in terms of physio-chemical parameters of the nigeen basin and brari nambal lagoon of the dal lake kashmir. besides this,the work also highlights and draws attention towards the water quality index in a simplified format which may be used at large and could represent the reliable picture of water quality. some parameters were measured at the sampling sites while other were put for laboratory analysis. water quality was surveyed from may 2013 to august 2013 at three different sites which were located on the nigeen basin. average values of the water quality parameters were obtained over a period of four months from may 2013 to august 2013 for brari nambal lagoon. a total of seven water quality parameters namely ph,electrical conductivity (ec),salinity,dissolved oxygen (do),turbidity,air temperature and water temperature were measured at the sampling sites. while for laboratory analysis,there were fourteen parameters namely chemical oxygen demand (cod),biochemical oxygen demand (bod),total dissolved salts (tds),free carbon-dioxide,acidity,nitrite,phosphate,sulphate,colour,total hardness,alkalinity,chloride,calcium and magnesium ion concentration. monthly changes in various physical and chemical parameters were analysed.