GROUNDWATER QUALITY MAPPING USING REMOTE SENSING AND GIS – A CASE STUDY FOR NAGONDAPALLI PANCHAYAT, HOSUR BLOCK, KRISHNAGIRI (DT), TAMILNADU, INDIA.

Abstract

Water is an elixir of life. It is an indispensable natural resource of this  planet.Water availability and its quality has a profound impact on the overall well-being of people in a country and its development. Ground water is the major source in India not only for domestic use, but also for agricultural and industrial sector. The present investigations orient towards assessing the groundwater quality in Nagondapalli Panchayat of Hosur block and to map the groundwater quality using GIS. Groundwater samples were collected from different location in and around the study area. The physico-chemical parameter such as pH, EC, TH, TDS, TA, Ca, Mg, Na, K, Cl, F, SO4, NO3, HCO3were analyzed and results were compared with WHO standards. ArcGIS software tools were used for analyzing and displaying the spatial data for investigations ground water quality. The results showed that most of the parameters were within permissible limits,except in some areas theEC, TH, TDS, TA, Ca, Mg, HCO3 wasslightly high.Using overlay and thematic map interpretation for the selected critical parameters spatial distribution of drinking water is mapped through GIS software