Assessment of Water Quality Trends of Khadakwasla Reservoir Using CCME-WQI

摘要

The present paper is based on the water quality studies in Khadakwasla Reservoir done from November 2003 to May 2012. Twenty water quality parameters were analyzed for samples collected from five locations. The analyzed data were subjected to the formulation by Candian Council of Ministers of Environment (CCME) Water Quality Index (WQI). Such assessment by calculation makes it simple, to know the trend of water quality. The physicochemical water quality parameters used for this Index are pH, EC, DO,BOD, COD, Na, K, Ca, Mg, TH, C0_3, HCO3, TAlk, CI, S04, NO3-N, PO4-P, Fe, Si02, TDS. The first component of this index F_1 (Scope), i.e., the percentage of Variables (parameters) exceeding the standard(std) permissible limits, ranged from 10 to 30%. Thesecond component, F_2 (Frequency), i.e., percentage failed tests under each failed Variables ranged from 2 to 13%. The third component F_3 (Amplitude) of failed tests ranged from 1 to 32. The values of F_1 F_2, and F_3 showed an increase from 2003 to 2012. Water quality grade ranged from 76 to 94, depicting 2% fair and 98% good water quality samples.