Study of evaluation of groundwater in Gadilam basin using hydrogeochemical and isotope data

Gadilam river basin has gained its importance due to the presence of Neyveli Lignite open cast mines and other industrial complexes. It is also due to extensive depressurization of Cuddalore aquifer, and bore wells for New Veeranam Scheme are constructed downstream of the basin. Geochemical indicators of groundwater were used to identify the chemical processes that control hydrogeochemistry. Chemical parameters of groundwater such as pH, electrical conductivity, total dissolved solids, sodium (Na+), potassium (K+), calcium (Ca+), magnesium (Mg+), bicarbonate (HCO-3 ), sulfate (SO-4 ),phosphate (PO-4 ), and silica (H4SiO4) were determined. Interpretation of hydrogeochemical data suggests that leaching of ions followed by weathering and anthropogenic impact controls the chemistry of the groundwater. Isotopic study reveals that recharge from meteoric source in sedimentary terrain and rock-water interaction with significant evaporation prevails in hard rock region

Liquid Waste Dumping Site Suitability Analysis for Chengalpattu Taluk Using GIS

Abstract: The management of the waste is the main problem faced by all community. Proper management of the waste helps in safe and clean environment. The study area includes one of the developing community which lacks waste management. The objective of the study involves in selecting suitable site for construction of waste water treatment plant for proper waste disposal. The process involves in preparing various thematic maps and providing it with rank and weightage. These various thematic maps are analyzed by interpretation and by overlaying using GIS software. The overlaid map is classified into four category representing unsuitable, less suitable, moderately suitable and most suitable from which the best site for treatment plant is selected