The evolution of groundwater quality at a wet zone in Sri Lanka was made clear using field investigation, chemical and isotopic analyses methods. In the wet zone, the concentrations of major ions and electrical conductivity (EC) in the groundwater are low with small seasonal change. Except for sodium, silica and chloride, the EC and other major ion concentrations increase along the groundwater flow direction. The contributions of bicarbonate and calcium ions to the increase in EC are the largest among the major ions.

The residents of Kuil Thothom, a slum tenement in Santhome, Chennai, have a lot to be thankful to the Rotary Club of Madras Central, especially R Jeyakumar, its chair

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