The study presents the spatial analysis of groundwater levels and its quality for the year 1998 for Kakinada town in coastal Andhra Pradesh. The Deltaic Regional Centre of NIH has been monitoring groundwater levels and its quality in and around Kakinada town since 1994. Groundwater samples have been analyzed for physical and chemical parameters. The variation in each parameter is discussed in the report.
A total of 164 samples were collected from 41 observation wells during the months of February, May, August and November 1998. The area covered by these observation wells is around 82 sqkms. The groundwater table contours were plotted for pre-monsoon (May 98) and post monsoon (November 98) periods and the approximate flow direction had been demarcated.
Further, samples have been classified according to Stiff, Piper’s and US Salinity laboratory classifications and their seasonal changes observed. The groundwater quality maps of total dissolved solids (TDS), total hardness, chloride and Sodium Absorption Ratio (SAR) have been prepared for pre monsoon (May 98) and post monsoon (Nov 98) periods and the change in spatial distribution observed.
More studies are necessary to understand the vertical variation of groundwater quality in the study area.
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