Abstract
SPATIAL DISTRIBUTION OF TOTAL DISSOLVED SOLIDS IN THE GROUNDWATERS OF BANGALORE CITY, KARNATAKA, INDIA.
Shankar B. S.
ABSTRACT
Enhanced level of TDS in drinking water produces harmful effects on human health and aquatic ecology. The present study deals with the spatial assessment of Total dissolved solids (TDS) levels in the ground waters of the industrial zones of Bangalore urban. Three major industrial zones comprising of 8 areas were selected for the study. 30 groundwater samples from each of these areas (total of 240 samples), were analyzed for TDS during the pre-monsoon and post-monsoon periods of 2015. Thus, overall 480 samples in the two seasons were analyzed as per the Standard methods for the examination of water and waste water (APHA, 2002) and the analyses results interpreted as per the Bureau of Indian standards (BIS 10,500: 2003). Based on the analyses results, 20% of the waters from the entire study area have recorded excess TDS concentration (>2000 mg/L) as per the upper limit of BIS, with the Tannery area of Bangalore North being worst affected, with 60% of the samples exceeding the TDS limits. The north, east and south zones recorded 40%, 11% and 16% non-potability due to excess TDS. TDS contours depicting the same have also been presented.
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