Vol. 11 | No. 2 |735 - 742 | April - June | 2018 ISSN: 0974-1496 | e-ISSN: 0976-0083 | CODEN: RJCABP http://www.rasayanjournal.com http://www.rasayanjournal.co.in GROUNDWATER QUALITY MAPPING OF NANDIARU SUB- BASIN, TAMILNADU, INDIA BY USING GEO SPATIAL TECHNOLOGY K. Prabhu 1, 2,* and R. Sivakumar 1 1Department of Civil Engineering, SRM Institute of Science and Technology, Kattankulathur-603 203, Tamilnadu, India. 2Department of Civil Engineering, GRT Institute of Engineering & Technology, Tiruttani-631 209, Tamilnadu, India. *E-mail :
[email protected] ABSTRACT The surface and Groundwater are the most important natural resources of human life. Now a day’s Groundwater has become an essential resource due to an increase of its need for domestic, agricultural and industrial uses etc., consequently groundwater quality is very important as its quantity. The present study has shown the spatial variability of groundwater quality mapping for NandiAru sub-basin, Tamilnadu, India using geo-spatial technology. The borehole water samples were collected randomly at 50 sampling locations of the entire study area. The most important parameters of water quality such as pH, TDS, EC, Ca, Na, Mg, Cl, K, SO4, PO 4, NO 3, F and H2SiO4 has been tested for all the water samples in order to understand the hydro geochemistry of the groundwater. Based on the water quality parameter results were compared with standard parameter values suggested by the Bureau of Indian Standards (IS 10500:2012) for drinking water suitability. The spatial contour map of these groundwater quality parameters was derived in GIS software using an interpolation technique. The overlay analysis was carried out for different spatial contour maps to prepare the groundwater quality map of the study area.