Assessment of Water Quality Parameters and Determination of Water Quality Index of Tube Well Water in Vengalacheddikulam DS Division,Vavuniya District, Sri Lanka
Keywords:
Geographical Information System (GIS), Inverse Distance Weighted interpolation (IDW), Water Quality Index (WQI), Water quality parameters.Abstract
An attempt was made to analyze the distribution pattern of selected water quality parameters in tube wells and to explore the water quality index of Vengalacheddikulam DS (Divisional Secretariat) division in Vavuniya district. Secondary data of water quality parameters in 60 tube wells were collected from Cheddikulam Pradeshiya Sabha (PS) and Water board of Vavuniya. Nine parameters such as pH, EC, TDS (Total Dissolved Solids), Alkalinity, Total Hardness, Sulphates, Chlorides, Fluorides, and Nitrates were analyzed for this study. WQI was calculated and analyzed based on the existing literatures. IDW technique was deployed to analyze the distribution pattern of this parameters including WQI in the study area. Water quality parameters except TDS and Sulphate were in greater than the acceptable level for human consumption in considerable parts of the study area. Nearly 44% of study area were falls in to above maximum permissible level of alkalinity. The WQI result reveals that nearly 21.5% of area is not suitable for human consumption. Remedial actions to be undertaken to overcome the prevailing water pollution issues in the region.
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