WATER QUALITY INDEX FOR THE EVALUATION OF THE WATER QUALITY OF SAGAR LAKE IN MADHYA PRADESH, INDIA

Abstract

Using the Water Quality Index (WQI) method, Sagar Lake's water quality was assessed. Over a
year, from April 2019 to March 2020, water samples were taken at eight specific Sagar Lake
locations. Water quality indicators like temperature, depth, and colour were measured directly
at the sampling site. Water depth was measured with a wooden stick dipped into the lake then
measured with a measuring tape. Water temperature was measured using a centigrade mercuryin-glass thermometer. Total dissolved solids, salinity, dissolved oxygen, pH, electric
conductivity, and total dissolved solids were all directly measured with portable HI 9812,
Hanna equipment. Total alkalinity and chloride were analysed by titration method in the
lab.The Pearson correlation matrix analysis revealed some of the measured values had a strong
correlation. The two-way ANOVA also revealed significant variations in different parameters
according to seasons. WQI values demonstrated the ease of understanding about the water
quality in Sagar Lake. These findings indicate the urgent need for plans to stop water
contamination in Sagar Lake.