Abstract

                                In Tamil Nadu, surface water flows are diminishing due to monsoon failures, decline in storage capacities of tanks due to encroachment, silting etc., leading to over exploitation of ground water. This led to lowering of groundwater table, increasing the pumping costs and change of water quality. A survey was made to assess the suitability of underground water both from open and bore wells at every revenue village of Thiruchirapalli district. Thiruchirappalli district with an area of 4,40,412 ha has been subdivided in to eight taluks comprising 483 revenue villages. The water samples, collection from all the revenue villages were analysed for pH, EC and cationic and anionic composition and the quality parameters like Residual Sodium Carbonate (RSC) and Sodium Adsorption Ratio (SAR) were computed.

Key words : Trichy, groundwater, water quality, alkali