Spatial Analysis of Fluoride concentration with respect to Lithology of the part of Chandrapur District

Abstract

Fluoride contamination is major issue in the Chandrapur area. Chandrapur district has a diverse geological set up, as all the lithologies are found here from Archean’s to Recent Alluvium. Contamination of Fluoride is mainly from geogenic sources. From the chemical data collected from the observation wells, zonation of Fluoride contamination is carried out in the present study with the help of Inverse Distance Weight (IDW) interpolation technique of Arc GIS Map software. Geology map of the area is prepared with different lithounits and logs are also prepared existing Bore wells. Co-relation has been done with geology of the area and Fluoride contamination at various locations within the study area using the zonation map. With this study differential coefficient of co-relation is observed at different Formation/Lithounits. Study further concludes that the fluoride contamination varies spatially and with the depth aspect with the change in mineral composition with depth in different lithologies. The study also highlights the inevitability of representing the variation in pollution level in spatial domain to understand the pattern of contamination.