Groundwater Quality Mapping of Nandiaru Subbasin, Tamilnadu, India by Using Geo Spatial Technology

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, PO4, NO3, 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.

Evaluation of Groundwater Quality in Premonsoon and Post-Monsoon Seasons of a Year Using Water Quality Index (Wqi)

“…The sodium (Na + ) ion is highly soluble in groundwater and it is a normal constituent of the body and adequate levels of Na + are wanted for better health. 18 Potassium (K + ) ion is an essential constituent in humans. It is a fundamental supplement; however, if it is excess, might act as a laxative.…”