Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Hydrogeological and environmental studies with special reference to fluoride occurrence in Peddavanka Halla Hirehalla basin Bellary district Karnataka state India

Auteur : Sreenivasan, Garimella

Université de soutenance : Karnatak University

Grade : Doctor of Philosophy (PhD) 1998

Objectifs
The further studies in PHB were taken up with the following aims and objectives : 1. To study in detail the geology covering the mineral chemistry and petrochemistry of the rock forming minerals and rocks of PHB and to assess the various primary sources for groundwater fluoride in PHB. 2. Soil studies including soil chemistry and soil leachate experiments to know the leachability offluoride by percolating waters. 3. Detailed geomorphologic studies covering drainage characteristics and drainage morphometry, geomorphic units, lineaments and hydrogeomorphology ; and to assess the control of the geomorphologic set up of PHB on the groundwater prospects and also the groundwater quality, mainly with respect to fluoride. 4. The climate ofthe area and its control on the groundwater quality. 5. The detailed hydrogeochemistry of PHB covering various standard hydrogeochemical classifications, statistical analysis, etc., to characterize the geochemical nature of the groundwaters and its control on the high fluoride content of the groundwaters. Also, comparative studies of deep and shallow aquifers of PHB with respect to general chemistry and also with respect to fluoride. 6. Detailed geoelectrical studies with main emphasis on vertical electrical soundings and radial vertical electrical soundings, to assess the subsurface electrical character and subsurface anisotropy conditions existing in PHB, and its control on the fluoride content in groundwaters ofPHB. 7. The study of the other environmental factors responsible for high fluoride incidence in groundwaters ofPHB. 8. The environmental impact of high fluoride bearing waters on the biological environment of the area and the various factors controlling the toxicity of fluoride on the human beings residing in the area. 9. An attempt on the bio-defluoridation methods to defluaridate the high fluoride bearing groundwaters

Présentation et version intégrale (Shodhganga)